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Format converter

Convert between JSON, CSV, YAML, and XML in your browser. Paste text or drop a file.

Drop a data file

Tool guide

Convert JSON, CSV, YAML, and XML locally

Transform structured data and inspect spreadsheets without desktop apps.

  • ConverterJSON, CSV, YAML, and XML with inline parsers.
  • SpreadsheetOpen XLSX and CSV with SheetJS; export CSV or XLSX.
  • Config cleanupIdeal for quick transforms and data inspection.

Pasted and uploaded data stays in your browser session.

How it works

  1. Pick subview Use Converter for format transforms or Spreadsheet for XLSX/CSV.
  2. Paste or upload Load structured data from clipboard or file.
  3. Export Copy converted output or download CSV/XLSX from the browser.

FAQ

Is my data uploaded?

Converter and spreadsheet views parse files locally with in-browser libraries.

Which formats can I convert?

JSON, CSV, YAML, and XML in the Converter subview with paste or file upload.

How does the spreadsheet view work?

Open XLSX or CSV with SheetJS, inspect cells, and export CSV or XLSX from your browser.

Are large spreadsheets supported?

Big files depend on browser memory. Very wide or long sheets may be slow on mobile devices.

What if conversion output looks wrong?

Check delimiters in CSV, quoting rules, and whether the source JSON is valid. Invalid input shows an error in the status bar.

Can I edit cells before export?

The spreadsheet subview supports basic inspection and export. Heavy editing may be better in a desktop spreadsheet app.

Do you validate XML schemas?

Conversion focuses on structure transforms, not XSD validation against external schemas.

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WARNING! Unsaved work

If you navigate away without saving, you will lose progress since your last save.