JSON Formatter
Format, validate, and minify JSON with clear, instant error messages if something's wrong.
Runs entirely in your browser — your files are never uploaded to a server.
This tool runs entirely in your browser. Your JSON data is never uploaded to our servers.
How It Works
1. Choose Your File
Drag & drop or select the file you want to work with.
2. Processed in Your Browser
Everything happens locally on your device — your file is never uploaded anywhere.
3. Download Your Result
Get your finished file instantly, ready to save or share.
Frequently Asked Questions
Does this tool validate my JSON?
Yes — "Format & Validate" checks your JSON is syntactically correct and shows a clear error message if it isn't.
Can I minify JSON instead of formatting it?
Yes, use the "Minify" button to compress your JSON onto a single line.
Is my JSON data sent to a server?
No — all parsing and formatting happens locally in your browser.