JSON formatter
Format, validate and minify JSON right in your browser, without sending data to a server.
10 free runs/dayv1.0.0
The JSON formatter pretty-prints hard-to-read JSON, reports syntax errors with their line and column, or minifies JSON before you send it to an API.
Everything runs in your browser, so it is safe for internal data too.
How to use
- Paste your JSON into the input box.
- Choose Format to pretty-print or Minify to strip whitespace.
- Copy the result or download it as a .json file.
Features
- Pretty-print JSON with 2 or 4 space indentation.
- Syntax errors with line and column.
- One-click minify.
- Copy or download the result.
Frequently asked questions
Changelog
v1.0.0 · 2026-10-31
First release.