THE FEUTEX TOOLKIT
CSV Tools
Find browser tools for CSV validation, duplicate handling, table comparison, JSON conversion and spreadsheet export.
Apply your own description rules to local CSV transactions and total each spending category.
Delimiter detection Header handling Ragged rows Strict quoting Trim/blank policies
Inspect column emptiness, unique values, numeric counts and numeric ranges.
Select and reorder named CSV columns.
Split a named column into two fields at the first separator.
CSV Delimiter Fixer with local processing, explicit controls and downloadable results.
Full-row/keyed duplicates Keep first/last Unique/duplicate output Trim/case comparison
Drop columns whose data cells are all blank or whitespace.
CSV Encoding to UTF-8 Converter with local processing, explicit controls and downloadable results.
Output delimiter Quoting policy LF/CRLF CSV download
CSV formatting Quote modes Custom delimiter C# code generation
CSV normalization Ragged-row padding Table preview Python code generation
Prefix potentially formula-interpreted cells with an apostrophe.
Sum a numeric column grouped by a categorical column.
Rename CSV headers using a JSON mapping without changing cell values.
Join CSV tables on a key, preserving unmatched left rows.
Pivot identifier, variable and value columns into a wide table.
Sort CSV records ascending by a finite numeric column.
Report rows present only in one of two same-schema tables.
Filter a CSV column by text, empty values or numeric comparisons.
Append rows from a second table, aligning columns by header name.
Swap rows and columns of a rectangular CSV table.
File input CSV normalize JSON/TSV conversion CRLF output
Turn value columns into variable/value rows while keeping an identifier.
Convert quoted CSV data to JSON objects using its first row as headers.
Render rectangular CSV data as an escaped Markdown table.
Change comma-separated data into tab-separated data with quoted-field handling.
Create a real Excel workbook from CSV, preserving identifiers and storing values safely as text.
Keyed or row-index matching Ignore order Trim/case options Difference report
CSV field mapping M3U8 PLS JSON playlist XSPF Durations
File loading Validate/clean Deduplicate Sort Select columns Download
Extract event definitions, timestamps, locations and recurrence rules from an exported calendar.
Convert an array of objects to CSV with quoted fields and a combined header.
Build nested JSON objects from CSV headers such as person.name and address.city.
Input/output delimiter CSV/TSV/Markdown/aligned text Ragged padding Line endings
CSV JSON bidirectional TSV pipe Markdown NDJSON delimiter detection headers and trim
JSON column specifications seeded synthetic rows sequence dates UUID email CSV quoting/newline controls
DSL column specifications seeded data typed random values header delimiter quoting controls
JSON to delimited table nested flatten root wrappers quote/null/header options
delimited table to XML header-derived tags tag sanitization root/row names
Convert tab-separated tables to comma-separated values.
Export names, email addresses, phone numbers and organizations from a vCard contact list to a spreadsheet.
XML row inference attributes/nested flattening CSV TSV HTML SpreadsheetML XML
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