JSON · CSV · YAML Formatter
Paste data and format it instantly. JSON uses the native parser; CSV keeps quoted fields; YAML uses vendored js-yaml. Diff highlights added/removed lines. Your input never leaves the browser.
What you can do
- Format · Minify · Validate JSON
- CSV format · CSV→JSON · JSON→CSV
- YAML format · YAML→JSON · JSON→YAML
- Line diff
Privacy
All processing is local. Optional localStorage keeps your last paste on this device only.
Limits
- No auto-repair of broken JSON
- No Excel .xlsx
- Diff capped at 4000 lines
- YAML: js-yaml DEFAULT schema
FAQ
Is my data uploaded?
No.
CSV quoting rules?
RFC 4180-style quotes and "" escapes.
Ads?
None running right now. We may add ads or packs later and will update the footer.
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