Turn messy client CSV and Excel sheets into clean JSON arrays or keyed objects with column mapping. Developers convert 50 exports without hand-editing — local SheetJS work, 2 free batches a day.
Runs on SheetJS
Convert between XLSX workbooks and CSV files preserving sheets and encoding. Move data across Excel and pipelines — local SheetJS work, unlimited saves.
Convert INI files to JSON objects and back — legacy configs to modern tooling. Migrate .ini without hand-editing — local parsing, free, no signup.
Convert CSV files into queryable SQLite databases in your browser. Turn 100k-row exports into SELECT-able tables — local sql.js work, unlimited saves.
Strip or swap backgrounds on whole photo batches with color-key sampling and tolerance control. Sellers turn 40 supplier shots into clean white listings in one run — local Canvas work, 2 free batches a day.
Pull tables, form fields, and key-value pairs from stacks of PDFs into one clean CSV. Accountants turn 60 invoices into a spreadsheet in an afternoon — local pdf-lib parsing, 2 free batches a day.
Array-of-objects for APIs and databases; keyed-by-ID objects for lookups and configs. Convert once per shape: a 50-file client dump becomes one merged array or 50 keyed files, your choice per batch.
The tool unions all headers; missing cells become null. Standardize supplier exports first — renaming Date, Vender, AMT to date, vendor, amount before upload saves an hour of post-cleanup.
Tens of thousands of rows per file convert in seconds locally. Past ~100k rows, split by month or region — browsers slow on giant single sheets, and smaller files validate faster.
No — parsing runs locally in your browser with SheetJS; client data never leaves your device. Only the final JSON save counts as one Pro download.
JSON Formatter
Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
CSV Analyzer
Analyze CSV structure — column types, counts, unique values, and empty cells. Spot malformed rows and mixed types before import.
CSV to SQL INSERT
Convert CSV data into SQL INSERT statements with inferred column types. Seed test databases in minutes — local conversion, free, no signup.
CSV Row / JSON Generator
Generate random CSV rows or JSON lines for fixtures and tests — pick a format and row count. Seed mock data fast — local generation, free, no signup.
CSV Output Tools
Format and validate CSV files — consistent delimiters, quoting, and line endings. Fix files Excel mangles on export — local processing, free, no signup.
Last updated October 2026