desktop/source/lib/init.cxx                  |    4 
 sc/CppunitTest_sc_subsequent_export_test5.mk |   12 
 sc/Module_sc.mk                              |    1 
 sc/qa/unit/subsequent_export_test5.cxx       |  599 +++++++++++++++++++++++++++
 sc/source/ui/docshell/docsh.cxx              |  248 ++++++++++-
 5 files changed, 853 insertions(+), 11 deletions(-)

New commits:
commit da890cd46f182045e047ada281e26f0cbae725da
Author:     Andras Timar <[email protected]>
AuthorDate: Mon Mar 2 19:08:15 2026 +0100
Commit:     Miklos Vajna <[email protected]>
CommitDate: Tue Mar 3 08:24:34 2026 +0100

    CSV import/export: support JSON filter options in convert-to API
    
    Accept JSON-formatted filter options for CSV export and import,
    following the same {"Name":{"type":"...","value":"..."}} convention
    already used for PDF export. This provides a friendlier alternative
    to the positional comma-separated token format.
    
    Export supported properties: FieldSeparator, TextDelimiter,
    CharacterSet, QuoteAllText, SaveAsShown, SaveNumberAsSuch,
    SaveFormulas, RemoveSpace, EvaluateFormulas, IncludeBOM, Sheet.
    
    The Sheet property accepts either a string (sheet name, resolved
    via ScDocument::GetTable()) or a long (1-based sheet number).
    
    Import supported properties: FieldSeparator, TextDelimiter,
    CharacterSet, MergeDelimiters, RemoveSpace, QuotedFieldAsText,
    DetectSpecialNumber, DetectScientificNumber, EvaluateFormulas,
    SkipEmptyCells, StartRow, Language, FixedWidth, ColumnFormat.
    
    The ColumnFormat property accepts slash-separated column/format
    pairs (e.g. "1/2/2/1/3/10"), using the same format codes as the
    legacy token string (1=Standard, 2=Text, 3=MDY, 4=DMY, 5=YMD,
    9=Skip, 10=English). FixedWidth enables fixed-width column mode
    where ColumnFormat positions are character offsets.
    
    The legacy comma-separated format continues to work unchanged.
    
    In doc_saveAs(), skip the keyword token iteration when filter
    options start with "{" to avoid needlessly splitting JSON on
    commas.
    
    Includes unit tests covering all JSON filter options for both
    import and export paths.
    
    Change-Id: I844f95d632e7150ce902c5587b0f0157f53f5af6
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/200853
    Reviewed-by: Miklos Vajna <[email protected]>
    Tested-by: Jenkins CollaboraOffice <[email protected]>

diff --git a/desktop/source/lib/init.cxx b/desktop/source/lib/init.cxx
index 6a6b3751b986..f0ba6592bc90 100644
--- a/desktop/source/lib/init.cxx
+++ b/desktop/source/lib/init.cxx
@@ -3877,7 +3877,11 @@ static int doc_saveAs(LibreOfficeKitDocument* pThis, 
const char* sUrl, const cha
         bool bTakeOwnership = false;
         bool bCreateFromTemplate = false;
         MediaDescriptor aSaveMediaDescriptor;
+        if (!aFilterOptions.startsWith("{"))
         {
+            // Token-based filter options: scan for and remove special 
keywords.
+            // JSON options pass through unchanged — no keywords expected, and
+            // splitting on commas would needlessly mangle the JSON string.
             OUStringBuffer aFilteredBuf;
             sal_Int32 nIndex = 0;
             bool bFirst = true;
diff --git a/sc/CppunitTest_sc_subsequent_export_test5.mk 
b/sc/CppunitTest_sc_subsequent_export_test5.mk
new file mode 100644
index 000000000000..a494402dbbcd
--- /dev/null
+++ b/sc/CppunitTest_sc_subsequent_export_test5.mk
@@ -0,0 +1,12 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+$(eval $(call sc_subsequent_test,export_test5))
+
+# vim: set noet sw=4 ts=4:
diff --git a/sc/Module_sc.mk b/sc/Module_sc.mk
index 7046e10e2918..2d1abc9d6ae1 100644
--- a/sc/Module_sc.mk
+++ b/sc/Module_sc.mk
@@ -101,6 +101,7 @@ $(eval $(call gb_Module_add_slowcheck_targets,sc, \
        CppunitTest_sc_subsequent_export_test2 \
        CppunitTest_sc_subsequent_export_test3 \
        CppunitTest_sc_subsequent_export_test4 \
+       CppunitTest_sc_subsequent_export_test5 \
        CppunitTest_sc_uicalc \
        CppunitTest_sc_uicalc2 \
        CppunitTest_sc_vba_macro_test \
diff --git a/sc/qa/unit/subsequent_export_test5.cxx 
b/sc/qa/unit/subsequent_export_test5.cxx
new file mode 100644
index 000000000000..60196628530e
--- /dev/null
+++ b/sc/qa/unit/subsequent_export_test5.cxx
@@ -0,0 +1,599 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// Tests for JSON filter options in CSV import/export (convert-to API)
+
+#include "helper/qahelper.hxx"
+
+#include <docsh.hxx>
+#include <formulacell.hxx>
+
+#include <svtools/sfxecode.hxx>
+#include <svl/intitem.hxx>
+#include <sfx2/docfile.hxx>
+
+using namespace ::com::sun::star;
+
+class ScCsvJsonFilterTest : public ScModelTestBase
+{
+public:
+    ScCsvJsonFilterTest()
+        : ScModelTestBase(u"sc/qa/unit/data"_ustr)
+    {
+    }
+
+protected:
+    OString readExportedFile()
+    {
+        SvMemoryStream aMemoryStream;
+        SvFileStream aStream(maTempFile.GetURL(), StreamMode::READ);
+        aStream.ReadStream(aMemoryStream);
+        const char* pData = static_cast<const char*>(aMemoryStream.GetData());
+        int offset = 0;
+        // Skip BOM if present
+        if (aMemoryStream.GetSize() > 2 && pData[0] == '\xEF' && pData[1] == 
'\xBB'
+            && pData[2] == '\xBF')
+            offset = 3;
+        return OString(pData + offset, aMemoryStream.GetSize() - offset);
+    }
+};
+
+// --- CSV Export Tests ---
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonFieldSeparator)
+{
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"A"_ustr);
+    pDoc->SetString(ScAddress(1, 0, 0), u"B"_ustr);
+    pDoc->SetString(ScAddress(2, 0, 0), u"C"_ustr);
+
+    
setFilterOptions(u"{\"FieldSeparator\":{\"type\":\"string\",\"value\":\"\t\"}}"_ustr);
+    save(TestFilter::CSV);
+    OString aData = readExportedFile();
+    CPPUNIT_ASSERT_MESSAGE("Tab separator should be used", aData.indexOf("A    
B       C") >= 0);
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonTextDelimiter)
+{
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    // Text containing the separator character (comma) requires quoting
+    pDoc->SetString(ScAddress(0, 0, 0), u"hello,world"_ustr);
+    pDoc->SetString(ScAddress(1, 0, 0), u"plain"_ustr);
+
+    // Use single quote as text delimiter
+    
setFilterOptions(u"{\"TextDelimiter\":{\"type\":\"string\",\"value\":\"'\"},"
+                     
"\"QuoteAllText\":{\"type\":\"boolean\",\"value\":true}}"_ustr);
+    save(TestFilter::CSV);
+    OString aData = readExportedFile();
+    // Fields should be quoted with single quotes
+    CPPUNIT_ASSERT_MESSAGE("Single quote delimiter expected", 
aData.indexOf("'hello,world'") >= 0);
+    CPPUNIT_ASSERT_MESSAGE("QuoteAllText should quote plain text too",
+                           aData.indexOf("'plain'") >= 0);
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonSaveAsShown)
+{
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetValue(ScAddress(0, 0, 0), 1.23456789);
+
+    // SaveAsShown=false means the full precision value is exported
+    
setFilterOptions(u"{\"SaveAsShown\":{\"type\":\"boolean\",\"value\":false}}"_ustr);
+    save(TestFilter::CSV);
+    OString aData = readExportedFile();
+    // Should contain the full precision number
+    CPPUNIT_ASSERT_MESSAGE("Full precision expected", 
aData.indexOf("1.23456789") >= 0);
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonSaveFormulas)
+{
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetValue(ScAddress(0, 0, 0), 10.0);
+    pDoc->SetValue(ScAddress(1, 0, 0), 20.0);
+    pDoc->SetString(ScAddress(2, 0, 0), u"=A1+B1"_ustr);
+
+    
setFilterOptions(u"{\"SaveFormulas\":{\"type\":\"boolean\",\"value\":true}}"_ustr);
+    save(TestFilter::CSV);
+    OString aData = readExportedFile();
+    // The formula should appear in the output, not the computed value 30
+    CPPUNIT_ASSERT_MESSAGE("Formula should be exported", 
aData.indexOf("=A1+B1") >= 0);
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonSaveNumberAsSuch)
+{
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetValue(ScAddress(0, 0, 0), 42.0);
+
+    // SaveNumberAsSuch=true (default) saves numbers without quoting
+    
setFilterOptions(u"{\"SaveNumberAsSuch\":{\"type\":\"boolean\",\"value\":true},"
+                     
"\"QuoteAllText\":{\"type\":\"boolean\",\"value\":true}}"_ustr);
+    save(TestFilter::CSV);
+    OString aData = readExportedFile();
+    // Number should NOT be quoted even when QuoteAllText is true
+    CPPUNIT_ASSERT_MESSAGE("Number should not be quoted", 
aData.indexOf("\"42\"") < 0);
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonIncludeBOM)
+{
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"test"_ustr);
+
+    
setFilterOptions(u"{\"IncludeBOM\":{\"type\":\"boolean\",\"value\":true}}"_ustr);
+    save(TestFilter::CSV);
+
+    SvFileStream aStream(maTempFile.GetURL(), StreamMode::READ);
+    char buf[3] = {};
+    aStream.ReadBytes(buf, 3);
+    // UTF-8 BOM: EF BB BF
+    CPPUNIT_ASSERT_EQUAL('\xEF', buf[0]);
+    CPPUNIT_ASSERT_EQUAL('\xBB', buf[1]);
+    CPPUNIT_ASSERT_EQUAL('\xBF', buf[2]);
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonNoBOM)
+{
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"test"_ustr);
+
+    
setFilterOptions(u"{\"IncludeBOM\":{\"type\":\"boolean\",\"value\":false}}"_ustr);
+    save(TestFilter::CSV);
+
+    SvFileStream aStream(maTempFile.GetURL(), StreamMode::READ);
+    char buf[4] = {};
+    aStream.ReadBytes(buf, 4);
+    // Should start with "test", not BOM
+    CPPUNIT_ASSERT_EQUAL("test"_ostr, OString(buf, 4));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonSheet)
+{
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->InsertTab(1, u"Second"_ustr);
+    pDoc->SetString(ScAddress(0, 0, 0), u"first_sheet"_ustr);
+    pDoc->SetString(ScAddress(0, 0, 1), u"second_sheet"_ustr);
+
+    // Export the second sheet by number (1-based)
+    setFilterOptions(u"{\"Sheet\":{\"type\":\"long\",\"value\":2}}"_ustr);
+    save(TestFilter::CSV);
+    OString aData = readExportedFile();
+    CPPUNIT_ASSERT_MESSAGE("Should contain second sheet data", 
aData.indexOf("second_sheet") >= 0);
+    CPPUNIT_ASSERT_MESSAGE("Should not contain first sheet data", 
aData.indexOf("first_sheet") < 0);
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonSheetByName)
+{
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->InsertTab(1, u"MySheet"_ustr);
+    pDoc->SetString(ScAddress(0, 0, 0), u"first_sheet"_ustr);
+    pDoc->SetString(ScAddress(0, 0, 1), u"named_sheet"_ustr);
+
+    // Export sheet by name
+    
setFilterOptions(u"{\"Sheet\":{\"type\":\"string\",\"value\":\"MySheet\"}}"_ustr);
+    save(TestFilter::CSV);
+    OString aData = readExportedFile();
+    CPPUNIT_ASSERT_MESSAGE("Should contain named sheet data", 
aData.indexOf("named_sheet") >= 0);
+    CPPUNIT_ASSERT_MESSAGE("Should not contain first sheet data", 
aData.indexOf("first_sheet") < 0);
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonDefaults)
+{
+    // When JSON is used but no options specified, defaults should apply:
+    // UTF-8, comma separator, double-quote delimiter
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"hello"_ustr);
+    pDoc->SetString(ScAddress(1, 0, 0), u"world"_ustr);
+
+    // Empty JSON object - all defaults
+    setFilterOptions(u"{}"_ustr);
+    save(TestFilter::CSV);
+    OString aData = readExportedFile();
+    CPPUNIT_ASSERT_MESSAGE("Comma separator by default", 
aData.indexOf("hello,world") >= 0);
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonMultipleOptions)
+{
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"text"_ustr);
+    pDoc->SetValue(ScAddress(1, 0, 0), 42.0);
+    pDoc->SetString(ScAddress(2, 0, 0), u"=B1*2"_ustr);
+
+    
setFilterOptions(u"{\"FieldSeparator\":{\"type\":\"string\",\"value\":\";\"},"
+                     "\"SaveFormulas\":{\"type\":\"boolean\",\"value\":true},"
+                     
"\"IncludeBOM\":{\"type\":\"boolean\",\"value\":false}}"_ustr);
+    save(TestFilter::CSV);
+    OString aData = readExportedFile();
+    CPPUNIT_ASSERT_MESSAGE("Semicolon separator expected", aData.indexOf(';') 
>= 0);
+    CPPUNIT_ASSERT_MESSAGE("Formula should be present", aData.indexOf("=B1*2") 
>= 0);
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvExportJsonLegacyFallback)
+{
+    // Non-JSON filter options should still work (legacy format)
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"A"_ustr);
+    pDoc->SetString(ScAddress(1, 0, 0), u"B"_ustr);
+
+    // Legacy format: field_sep, text_sep, charset
+    setFilterOptions(u"9,34,UTF-8"_ustr);
+    save(TestFilter::CSV);
+    OString aData = readExportedFile();
+    CPPUNIT_ASSERT_MESSAGE("Tab separator (legacy format)", aData.indexOf("A   
B") >= 0);
+}
+
+// --- CSV Import Tests ---
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportJsonFieldSeparator)
+{
+    // Create a document, export with semicolons, then reimport with JSON 
options
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"Col1"_ustr);
+    pDoc->SetString(ScAddress(1, 0, 0), u"Col2"_ustr);
+    pDoc->SetString(ScAddress(2, 0, 0), u"Col3"_ustr);
+    pDoc->SetValue(ScAddress(0, 1, 0), 10.0);
+    pDoc->SetValue(ScAddress(1, 1, 0), 20.0);
+    pDoc->SetValue(ScAddress(2, 1, 0), 30.0);
+
+    // Export with semicolon separator
+    
setFilterOptions(u"{\"FieldSeparator\":{\"type\":\"string\",\"value\":\";\"}}"_ustr);
+    save(TestFilter::CSV);
+
+    // Now reimport with JSON options specifying semicolon
+    setImportFilterName(TestFilter::CSV);
+    
setImportFilterOptions(u"{\"FieldSeparator\":{\"type\":\"string\",\"value\":\";\"}}"_ustr);
+    loadFromURL(maTempFile.GetURL());
+    pDoc = getScDoc();
+
+    CPPUNIT_ASSERT_EQUAL(u"Col1"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"Col2"_ustr, pDoc->GetString(ScAddress(1, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"Col3"_ustr, pDoc->GetString(ScAddress(2, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(10.0, pDoc->GetValue(ScAddress(0, 1, 0)));
+    CPPUNIT_ASSERT_EQUAL(20.0, pDoc->GetValue(ScAddress(1, 1, 0)));
+    CPPUNIT_ASSERT_EQUAL(30.0, pDoc->GetValue(ScAddress(2, 1, 0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportJsonStartRow)
+{
+    // Create a CSV with header rows we want to skip
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"Header1"_ustr);
+    pDoc->SetString(ScAddress(1, 0, 0), u"Header2"_ustr);
+    pDoc->SetString(ScAddress(0, 1, 0), u"SubHeader1"_ustr);
+    pDoc->SetString(ScAddress(1, 1, 0), u"SubHeader2"_ustr);
+    pDoc->SetString(ScAddress(0, 2, 0), u"Data1"_ustr);
+    pDoc->SetValue(ScAddress(1, 2, 0), 100.0);
+
+    setFilterOptions(u"{}"_ustr);
+    save(TestFilter::CSV);
+
+    // Reimport starting from row 3 (skip two header rows)
+    setImportFilterName(TestFilter::CSV);
+    
setImportFilterOptions(u"{\"StartRow\":{\"type\":\"long\",\"value\":3}}"_ustr);
+    loadFromURL(maTempFile.GetURL());
+    pDoc = getScDoc();
+
+    // First row should be "Data1", not "Header1"
+    CPPUNIT_ASSERT_EQUAL(u"Data1"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(100.0, pDoc->GetValue(ScAddress(1, 0, 0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportJsonQuotedFieldAsText)
+{
+    // Write a CSV file with a quoted number
+    utl::TempFileNamed aTempFile;
+    aTempFile.EnableKillingFile();
+    {
+        SvFileStream aStream(aTempFile.GetURL(), StreamMode::WRITE);
+        // "12345" is a number wrapped in quotes
+        aStream.WriteOString("\"12345\",plain
");
+        aStream.Flush();
+    }
+
+    // Import with QuotedFieldAsText=true - quoted numbers should become text
+    setImportFilterName(TestFilter::CSV);
+    
setImportFilterOptions(u"{\"QuotedFieldAsText\":{\"type\":\"boolean\",\"value\":true}}"_ustr);
+    loadFromURL(aTempFile.GetURL());
+    ScDocument* pDoc = getScDoc();
+
+    // The quoted number should be imported as text, not number
+    CPPUNIT_ASSERT_MESSAGE("Should be text, not number", 
pDoc->HasStringData(0, 0, 0));
+    CPPUNIT_ASSERT_EQUAL(u"12345"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportJsonDetectSpecialNumber)
+{
+    // Create CSV with a date-like string
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"text"_ustr);
+    pDoc->SetString(ScAddress(1, 0, 0), u"12/31/2025"_ustr);
+
+    // Export without quoting to get raw text in CSV
+    setFilterOptions(u"{}"_ustr);
+    save(TestFilter::CSV);
+
+    // Import with DetectSpecialNumber=false - date should be kept as text
+    setImportFilterName(TestFilter::CSV);
+    setImportFilterOptions(
+        
u"{\"DetectSpecialNumber\":{\"type\":\"boolean\",\"value\":false}}"_ustr);
+    loadFromURL(maTempFile.GetURL());
+    pDoc = getScDoc();
+
+    CPPUNIT_ASSERT_EQUAL(u"text"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+    // With DetectSpecialNumber=false, the date string should stay as text
+    CPPUNIT_ASSERT_MESSAGE("Date should be imported as text", 
pDoc->HasStringData(1, 0, 0));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportJsonEvaluateFormulas)
+{
+    // Create CSV with a formula
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetValue(ScAddress(0, 0, 0), 10.0);
+    pDoc->SetString(ScAddress(1, 0, 0), u"=A1*2"_ustr);
+
+    // Export formulas as text
+    
setFilterOptions(u"{\"SaveFormulas\":{\"type\":\"boolean\",\"value\":true}}"_ustr);
+    save(TestFilter::CSV);
+
+    // Import with EvaluateFormulas=false - formula should be text
+    setImportFilterName(TestFilter::CSV);
+    
setImportFilterOptions(u"{\"EvaluateFormulas\":{\"type\":\"boolean\",\"value\":false}}"_ustr);
+    loadFromURL(maTempFile.GetURL());
+    pDoc = getScDoc();
+
+    // The formula text should be imported as a string, not evaluated
+    CPPUNIT_ASSERT_MESSAGE("Formula should be imported as text", 
pDoc->HasStringData(1, 0, 0));
+    CPPUNIT_ASSERT_EQUAL(u"=A1*2"_ustr, pDoc->GetString(ScAddress(1, 0, 0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, 
testCsvImportJsonEvaluateFormulasTrue)
+{
+    // Create CSV with a formula
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetValue(ScAddress(0, 0, 0), 10.0);
+    pDoc->SetString(ScAddress(1, 0, 0), u"=A1*2"_ustr);
+
+    // Export formulas
+    
setFilterOptions(u"{\"SaveFormulas\":{\"type\":\"boolean\",\"value\":true}}"_ustr);
+    save(TestFilter::CSV);
+
+    // Import with EvaluateFormulas=true - formula should be evaluated
+    setImportFilterName(TestFilter::CSV);
+    
setImportFilterOptions(u"{\"EvaluateFormulas\":{\"type\":\"boolean\",\"value\":true}}"_ustr);
+    loadFromURL(maTempFile.GetURL());
+    pDoc = getScDoc();
+
+    // The formula should be evaluated
+    CPPUNIT_ASSERT_EQUAL(10.0, pDoc->GetValue(ScAddress(0, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(20.0, pDoc->GetValue(ScAddress(1, 0, 0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportJsonRemoveSpace)
+{
+    // Write a CSV file with spaces around values manually
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"  hello  "_ustr);
+    pDoc->SetString(ScAddress(1, 0, 0), u"  world  "_ustr);
+
+    setFilterOptions(u"{}"_ustr);
+    save(TestFilter::CSV);
+
+    // Import with RemoveSpace=true
+    setImportFilterName(TestFilter::CSV);
+    
setImportFilterOptions(u"{\"RemoveSpace\":{\"type\":\"boolean\",\"value\":true}}"_ustr);
+    loadFromURL(maTempFile.GetURL());
+    pDoc = getScDoc();
+
+    // Spaces should be trimmed
+    CPPUNIT_ASSERT_EQUAL(u"hello"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"world"_ustr, pDoc->GetString(ScAddress(1, 0, 0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportJsonColumnFormat)
+{
+    // Write a CSV file with values that could be interpreted as numbers
+    utl::TempFileNamed aTempFile;
+    aTempFile.EnableKillingFile();
+    {
+        SvFileStream aStream(aTempFile.GetURL(), StreamMode::WRITE);
+        // "00123" has leading zeros - only preserved with Text format
+        aStream.WriteOString("00123,text,456
");
+        aStream.Flush();
+    }
+
+    // Import with column formats: col 1 as Text (2), col 2 as Standard (1), 
col 3 as Text (2)
+    setImportFilterName(TestFilter::CSV);
+    setImportFilterOptions(
+        
u"{\"ColumnFormat\":{\"type\":\"string\",\"value\":\"1/2/2/1/3/2\"}}"_ustr);
+    loadFromURL(aTempFile.GetURL());
+    ScDocument* pDoc = getScDoc();
+
+    // Column 1 (format=Text): "00123" should be kept as text with leading 
zeros
+    CPPUNIT_ASSERT_MESSAGE("Col1 should be text (ColumnFormat=2)", 
pDoc->HasStringData(0, 0, 0));
+    CPPUNIT_ASSERT_EQUAL(u"00123"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+
+    // Column 2 (format=Standard): "text" stays text
+    CPPUNIT_ASSERT_EQUAL(u"text"_ustr, pDoc->GetString(ScAddress(1, 0, 0)));
+
+    // Column 3 (format=Text): "456" should be text, not number
+    CPPUNIT_ASSERT_MESSAGE("Col3 should be text (ColumnFormat=2)", 
pDoc->HasStringData(2, 0, 0));
+    CPPUNIT_ASSERT_EQUAL(u"456"_ustr, pDoc->GetString(ScAddress(2, 0, 0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportJsonColumnFormatSkip)
+{
+    // Write a CSV file to test Skip column format
+    utl::TempFileNamed aTempFile;
+    aTempFile.EnableKillingFile();
+    {
+        SvFileStream aStream(aTempFile.GetURL(), StreamMode::WRITE);
+        aStream.WriteOString("keep1,skip_me,keep2
");
+        aStream.Flush();
+    }
+
+    // Import: col 1=Standard, col 2=Skip(9), col 3=Standard
+    setImportFilterName(TestFilter::CSV);
+    setImportFilterOptions(
+        
u"{\"ColumnFormat\":{\"type\":\"string\",\"value\":\"1/1/2/9/3/1\"}}"_ustr);
+    loadFromURL(aTempFile.GetURL());
+    ScDocument* pDoc = getScDoc();
+
+    CPPUNIT_ASSERT_EQUAL(u"keep1"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+    // Column 2 was skipped, so "keep2" should be in column B (index 1)
+    CPPUNIT_ASSERT_EQUAL(u"keep2"_ustr, pDoc->GetString(ScAddress(1, 0, 0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportJsonMergeDelimiters)
+{
+    // Create CSV with multiple consecutive separators
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"A"_ustr);
+    pDoc->SetString(ScAddress(1, 0, 0), u"B"_ustr);
+
+    // Export with tab separator
+    
setFilterOptions(u"{\"FieldSeparator\":{\"type\":\"string\",\"value\":\"\t\"}}"_ustr);
+    save(TestFilter::CSV);
+
+    // Manually we can't easily create double-tabs via export, but we can
+    // test that MergeDelimiters option is accepted without error
+    setImportFilterName(TestFilter::CSV);
+    
setImportFilterOptions(u"{\"FieldSeparator\":{\"type\":\"string\",\"value\":\"\t\"},"
+                           
"\"MergeDelimiters\":{\"type\":\"boolean\",\"value\":true}}"_ustr);
+    loadFromURL(maTempFile.GetURL());
+    pDoc = getScDoc();
+
+    CPPUNIT_ASSERT_EQUAL(u"A"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"B"_ustr, pDoc->GetString(ScAddress(1, 0, 0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportJsonFixedWidth)
+{
+    // Write a fixed-width text file manually
+    utl::TempFileNamed aTempFile;
+    aTempFile.EnableKillingFile();
+    {
+        SvFileStream aStream(aTempFile.GetURL(), StreamMode::WRITE);
+        // Fixed width: col1=5chars, col2=5chars, col3=rest
+        OString aLine("ABCDE12345Hello
"_ostr);
+        aStream.WriteOString(aLine);
+        aStream.Flush();
+    }
+
+    // Import as fixed-width with column positions at 0, 5, 10
+    setImportFilterName(TestFilter::CSV);
+    setImportFilterOptions(
+        u"{\"FixedWidth\":{\"type\":\"boolean\",\"value\":true},"
+        
"\"ColumnFormat\":{\"type\":\"string\",\"value\":\"0/1/5/1/10/1\"}}"_ustr);
+    loadFromURL(aTempFile.GetURL());
+    ScDocument* pDoc = getScDoc();
+
+    CPPUNIT_ASSERT_EQUAL(u"ABCDE"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(12345.0, pDoc->GetValue(ScAddress(1, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"Hello"_ustr, pDoc->GetString(ScAddress(2, 0, 0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, 
testCsvImportJsonFixedWidthTextFormat)
+{
+    // Write a fixed-width text file with numbers that should be kept as text
+    utl::TempFileNamed aTempFile;
+    aTempFile.EnableKillingFile();
+    {
+        SvFileStream aStream(aTempFile.GetURL(), StreamMode::WRITE);
+        // Fixed width: col1=5chars (zip code), col2=10chars (phone)
+        OString aLine("0712305551234567
"_ostr);
+        aStream.WriteOString(aLine);
+        aStream.Flush();
+    }
+
+    // Import as fixed-width: col1 as Text(2), col2 as Text(2)
+    setImportFilterName(TestFilter::CSV);
+    
setImportFilterOptions(u"{\"FixedWidth\":{\"type\":\"boolean\",\"value\":true},"
+                           
"\"ColumnFormat\":{\"type\":\"string\",\"value\":\"0/2/5/2\"}}"_ustr);
+    loadFromURL(aTempFile.GetURL());
+    ScDocument* pDoc = getScDoc();
+
+    // Should preserve leading zeros as text
+    CPPUNIT_ASSERT_MESSAGE("Zip code should be text", pDoc->HasStringData(0, 
0, 0));
+    CPPUNIT_ASSERT_EQUAL(u"07123"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+    CPPUNIT_ASSERT_MESSAGE("Phone should be text", pDoc->HasStringData(1, 0, 
0));
+    CPPUNIT_ASSERT_EQUAL(u"05551234567"_ustr, pDoc->GetString(ScAddress(1, 0, 
0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportJsonLegacyFallback)
+{
+    // Non-JSON import filter options should still work (legacy format)
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"X"_ustr);
+    pDoc->SetString(ScAddress(1, 0, 0), u"Y"_ustr);
+
+    // Export with tabs
+    setFilterOptions(u"9,34,UTF-8"_ustr);
+    save(TestFilter::CSV);
+
+    // Reimport with legacy options (tab separator)
+    setImportFilterName(TestFilter::CSV);
+    setImportFilterOptions(u"9,34,UTF-8"_ustr);
+    loadFromURL(maTempFile.GetURL());
+    pDoc = getScDoc();
+
+    CPPUNIT_ASSERT_EQUAL(u"X"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"Y"_ustr, pDoc->GetString(ScAddress(1, 0, 0)));
+}
+
+CPPUNIT_TEST_FIXTURE(ScCsvJsonFilterTest, testCsvImportExportJsonRoundTrip)
+{
+    // Full round-trip: create doc, export with JSON options, reimport with 
JSON options
+    createScDoc();
+    ScDocument* pDoc = getScDoc();
+    pDoc->SetString(ScAddress(0, 0, 0), u"Name"_ustr);
+    pDoc->SetString(ScAddress(1, 0, 0), u"Value"_ustr);
+    pDoc->SetString(ScAddress(2, 0, 0), u"Note"_ustr);
+    pDoc->SetString(ScAddress(0, 1, 0), u"Item;One"_ustr); // contains 
semicolon
+    pDoc->SetValue(ScAddress(1, 1, 0), 3.14);
+    pDoc->SetString(ScAddress(2, 1, 0), u"a \"quoted\" note"_ustr); // 
contains quotes
+
+    // Export with semicolon separator
+    
setFilterOptions(u"{\"FieldSeparator\":{\"type\":\"string\",\"value\":\";\"},"
+                     
"\"IncludeBOM\":{\"type\":\"boolean\",\"value\":false}}"_ustr);
+    save(TestFilter::CSV);
+
+    // Reimport with matching options
+    setImportFilterName(TestFilter::CSV);
+    
setImportFilterOptions(u"{\"FieldSeparator\":{\"type\":\"string\",\"value\":\";\"}}"_ustr);
+    loadFromURL(maTempFile.GetURL());
+    pDoc = getScDoc();
+
+    CPPUNIT_ASSERT_EQUAL(u"Name"_ustr, pDoc->GetString(ScAddress(0, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"Value"_ustr, pDoc->GetString(ScAddress(1, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"Note"_ustr, pDoc->GetString(ScAddress(2, 0, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"Item;One"_ustr, pDoc->GetString(ScAddress(0, 1, 
0)));
+    CPPUNIT_ASSERT_EQUAL(3.14, pDoc->GetValue(ScAddress(1, 1, 0)));
+    CPPUNIT_ASSERT_EQUAL(u"a \"quoted\" note"_ustr, 
pDoc->GetString(ScAddress(2, 1, 0)));
+}
+
+CPPUNIT_PLUGIN_IMPLEMENT();
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sc/source/ui/docshell/docsh.cxx b/sc/source/ui/docshell/docsh.cxx
index 3eaeaad31b06..6978726d4e3e 100644
--- a/sc/source/ui/docshell/docsh.cxx
+++ b/sc/source/ui/docshell/docsh.cxx
@@ -28,6 +28,9 @@
 #include <editeng/justifyitem.hxx>
 #include <comphelper/fileformat.h>
 #include <comphelper/classids.hxx>
+#include <comphelper/propertysequence.hxx>
+#include <i18nlangtag/languagetag.hxx>
+#include <o3tl/string_view.hxx>
 #include <comphelper/propertyvalue.hxx>
 #include <formula/errorcodes.hxx>
 #include <vcl/stdtext.hxx>
@@ -1356,8 +1359,137 @@ bool ScDocShell::ConvertFrom( SfxMedium& rMedium )
 
             if ( const SfxStringItem* pOptionsItem = 
rMedium.GetItemSet().GetItemIfSet( SID_FILE_FILTEROPTIONS ) )
             {
-                aOptions.ReadFromString( pOptionsItem->GetValue(), 
rMedium.GetInStream() );
-                bOptInit = true;
+                OUString sFilterOptions = pOptionsItem->GetValue();
+
+                if (!sFilterOptions.isEmpty() && 
sFilterOptions.startsWith("{"))
+                {
+                    // JSON filter options (e.g. from convert-to API)
+                    // Start with sensible defaults, then override from JSON
+                    aOptions.SetCharSet(RTL_TEXTENCODING_UTF8);
+                    aOptions.SetFieldSeps( OUString(',') );
+                    aOptions.SetTextSep( '"' );
+
+                    try
+                    {
+                        std::vector<css::beans::PropertyValue> aProps
+                            = 
comphelper::JsonToPropertyValues(sFilterOptions.toUtf8());
+                        for (const auto& rProp : aProps)
+                        {
+                            if (rProp.Name == "FieldSeparator")
+                            {
+                                OUString sVal;
+                                rProp.Value >>= sVal;
+                                if (!sVal.isEmpty())
+                                    aOptions.SetFieldSeps( OUString(sVal[0]) );
+                            }
+                            else if (rProp.Name == "TextDelimiter")
+                            {
+                                OUString sVal;
+                                rProp.Value >>= sVal;
+                                aOptions.SetTextSep( sVal.isEmpty() ? 0 : 
sVal[0] );
+                            }
+                            else if (rProp.Name == "CharacterSet")
+                            {
+                                OUString sVal;
+                                rProp.Value >>= sVal;
+                                
aOptions.SetCharSet(ScGlobal::GetCharsetValue(sVal));
+                            }
+                            else if (rProp.Name == "MergeDelimiters")
+                            {
+                                bool bVal = false;
+                                rProp.Value >>= bVal;
+                                aOptions.SetMergeSeps(bVal);
+                            }
+                            else if (rProp.Name == "RemoveSpace")
+                            {
+                                bool bVal = false;
+                                rProp.Value >>= bVal;
+                                aOptions.SetRemoveSpace(bVal);
+                            }
+                            else if (rProp.Name == "QuotedFieldAsText")
+                            {
+                                bool bVal = false;
+                                rProp.Value >>= bVal;
+                                aOptions.SetQuotedAsText(bVal);
+                            }
+                            else if (rProp.Name == "DetectSpecialNumber")
+                            {
+                                bool bVal = false;
+                                rProp.Value >>= bVal;
+                                aOptions.SetDetectSpecialNumber(bVal);
+                            }
+                            else if (rProp.Name == "DetectScientificNumber")
+                            {
+                                bool bVal = false;
+                                rProp.Value >>= bVal;
+                                aOptions.SetDetectScientificNumber(bVal);
+                            }
+                            else if (rProp.Name == "EvaluateFormulas")
+                            {
+                                bool bVal = false;
+                                rProp.Value >>= bVal;
+                                aOptions.SetEvaluateFormulas(bVal);
+                            }
+                            else if (rProp.Name == "SkipEmptyCells")
+                            {
+                                bool bVal = false;
+                                rProp.Value >>= bVal;
+                                aOptions.SetSkipEmptyCells(bVal);
+                            }
+                            else if (rProp.Name == "StartRow")
+                            {
+                                sal_Int32 nVal = 1;
+                                rProp.Value >>= nVal;
+                                aOptions.SetStartRow(nVal);
+                            }
+                            else if (rProp.Name == "FixedWidth")
+                            {
+                                bool bVal = false;
+                                rProp.Value >>= bVal;
+                                aOptions.SetFixedLen(bVal);
+                            }
+                            else if (rProp.Name == "ColumnFormat")
+                            {
+                                // Slash-separated column/format pairs, e.g. 
"1/5/2/1/3/10"
+                                // Format codes: 1=Standard 2=Text 3=MDY 4=DMY 
5=YMD 9=Skip 10=English
+                                OUString sVal;
+                                rProp.Value >>= sVal;
+                                if (!sVal.isEmpty())
+                                {
+                                    ScCsvExpDataVec aDataVec;
+                                    const sal_Int32 nInfoCount
+                                        = 
comphelper::string::getTokenCount(sVal, '/') / 2;
+                                    sal_Int32 nP = 0;
+                                    for (sal_Int32 nInfo = 0; nInfo < 
nInfoCount; ++nInfo)
+                                    {
+                                        sal_Int32 nStart = 
o3tl::toInt32(o3tl::getToken(sVal, 0, '/', nP));
+                                        sal_uInt8 nFmt = 
static_cast<sal_uInt8>(o3tl::toInt32(o3tl::getToken(sVal, 0, '/', nP)));
+                                        aDataVec.emplace_back(nStart, nFmt);
+                                    }
+                                    if (!aDataVec.empty())
+                                        aOptions.SetColumnInfo(aDataVec);
+                                }
+                            }
+                            else if (rProp.Name == "Language")
+                            {
+                                OUString sVal;
+                                rProp.Value >>= sVal;
+                                if (!sVal.isEmpty())
+                                    
aOptions.SetLanguage(LanguageTag::convertToLanguageType(sVal));
+                            }
+                        }
+                    }
+                    catch (const std::exception& e)
+                    {
+                        SAL_WARN("sc.filter", "CSV JSON import filter options 
parse error: " << e.what());
+                    }
+                    bOptInit = true;
+                }
+                else
+                {
+                    aOptions.ReadFromString( sFilterOptions, 
rMedium.GetInStream() );
+                    bOptInit = true;
+                }
             }
 
             if ( !bOptInit )
@@ -2528,17 +2660,111 @@ bool ScDocShell::ConvertTo( SfxMedium &rMed )
             sItStr = pOptionsItem->GetValue();
         }
 
-        if ( sItStr.isEmpty() )
-        {
-            //  default for ascii export (from API without options):
-            //  UTF-8 encoding, comma, double quotes
+        weld::WaitObject aWait( GetActiveDialogParent() );
+        ScImportOptions aOptions(',', '"', RTL_TEXTENCODING_UTF8);
 
-            ScImportOptions aDefOptions(',', '"', RTL_TEXTENCODING_UTF8);
-            sItStr = aDefOptions.BuildString();
+        if (!sItStr.isEmpty() && sItStr.startsWith("{"))
+        {
+            // JSON filter options (e.g. from convert-to API)
+            try
+            {
+                std::vector<css::beans::PropertyValue> aProps
+                    = comphelper::JsonToPropertyValues(sItStr.toUtf8());
+                for (const auto& rProp : aProps)
+                {
+                    if (rProp.Name == "FieldSeparator")
+                    {
+                        OUString sVal;
+                        rProp.Value >>= sVal;
+                        if (!sVal.isEmpty())
+                            aOptions.nFieldSepCode = sVal[0];
+                    }
+                    else if (rProp.Name == "TextDelimiter")
+                    {
+                        OUString sVal;
+                        rProp.Value >>= sVal;
+                        aOptions.nTextSepCode = sVal.isEmpty() ? 0 : sVal[0];
+                    }
+                    else if (rProp.Name == "CharacterSet")
+                    {
+                        OUString sVal;
+                        rProp.Value >>= sVal;
+                        
aOptions.SetTextEncoding(ScGlobal::GetCharsetValue(sVal));
+                    }
+                    else if (rProp.Name == "QuoteAllText")
+                    {
+                        bool bVal = false;
+                        rProp.Value >>= bVal;
+                        aOptions.bQuoteAllText = bVal;
+                    }
+                    else if (rProp.Name == "SaveAsShown")
+                    {
+                        bool bVal = false;
+                        rProp.Value >>= bVal;
+                        aOptions.bSaveAsShown = bVal;
+                    }
+                    else if (rProp.Name == "SaveNumberAsSuch")
+                    {
+                        bool bVal = false;
+                        rProp.Value >>= bVal;
+                        aOptions.bSaveNumberAsSuch = bVal;
+                    }
+                    else if (rProp.Name == "SaveFormulas")
+                    {
+                        bool bVal = false;
+                        rProp.Value >>= bVal;
+                        aOptions.bSaveFormulas = bVal;
+                    }
+                    else if (rProp.Name == "RemoveSpace")
+                    {
+                        bool bVal = false;
+                        rProp.Value >>= bVal;
+                        aOptions.bRemoveSpace = bVal;
+                    }
+                    else if (rProp.Name == "EvaluateFormulas")
+                    {
+                        bool bVal = false;
+                        rProp.Value >>= bVal;
+                        aOptions.bEvaluateFormulas = bVal;
+                    }
+                    else if (rProp.Name == "IncludeBOM")
+                    {
+                        bool bVal = false;
+                        rProp.Value >>= bVal;
+                        aOptions.bIncludeBOM = bVal;
+                    }
+                    else if (rProp.Name == "Sheet")
+                    {
+                        // Accept string (sheet name) or long (1-based number)
+                        OUString sVal;
+                        sal_Int32 nVal = 0;
+                        if (rProp.Value >>= sVal)
+                        {
+                            // Resolve sheet name to 1-based index
+                            SCTAB nTab;
+                            if (m_pDocument->GetTable(sVal, nTab))
+                                aOptions.nSheetToExport = nTab + 1;
+                            else
+                                SetError(SCERR_EXPORT_DATA);
+                        }
+                        else if (rProp.Value >>= nVal)
+                        {
+                            aOptions.nSheetToExport = nVal;
+                        }
+                    }
+                }
+            }
+            catch (const std::exception& e)
+            {
+                SAL_WARN("sc.filter", "CSV JSON filter options parse error: " 
<< e.what());
+            }
         }
-
-        weld::WaitObject aWait( GetActiveDialogParent() );
-        ScImportOptions aOptions( sItStr );
+        else if (!sItStr.isEmpty())
+        {
+            // Legacy comma-separated token filter options
+            aOptions = ScImportOptions(sItStr);
+        }
+        // else: keep defaults (UTF-8, comma, double-quote)
 
         if (aOptions.nSheetToExport)
         {

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