Input
Paste JSON — processed locally
Indent:
Output
Format, validate, and convert JSON without sending it anywhere.
Your JSON stays on your device during normal use.
No signup, no paywall, no surprise limits.
Instant formatting and conversions with a predictable UI.
When you paste JSON here, it’s processed locally in your browser. Your JSON is not uploaded, stored, or logged by ser-json during normal use.
Want details? See the Privacy Policy.
Privacy-first: works in-browser, no server-side upload.
Simple, predictable workflow: paste → format/validate/convert.
No account required: no sign-in, no personal data needed.
Useful for sensitive payload inspection on your own device.
Quick conversions: JSON ↔ YAML/XML/CSV in one place.
Built by a developer. Designed to be fast, private, and predictable.
Paste JSON to beautify or minify it in seconds. ser-json runs entirely in your browser, so your data stays on your device.
How to use: paste your JSON in the input panel, click Beautify (or Minify), and copy the formatted output.