🛠Developer • Formatter • Validator
Free Online JSON Formatter, Validator, and Minifier
Use this free online JSON formatter and validator to prettify, validate, minify, sort, and clean JSON data instantly in your browser. Everything runs locally, so your files stay private and secure.
Compare / Diff Mode
Compare mode coming soon. You can still use the formatter, validator, and transform tools right away.
Why developers use this tool
- Pretty print JSON quickly for logs, APIs, and configs.
- Validate JSON syntax instantly and catch errors early.
- Minify JSON for compact payloads and faster transfers.
- Sort keys, remove null values, and format YAML from JSON.
- Works entirely in the browser with no uploads or data sharing.