JSON Beautifier
Format, validate, and beautify JSON with syntax highlighting. Minify or pretty-print with customizable indentation. 100% in your browser.
Drop a .json file here or click to browse
.json, .txt files supported
Private, instant, no limits
Paste or drop JSON, see the formatted output instantly with syntax highlighting — all without leaving your browser.
| Feature | jsonformatter.org | jsonlint.com | codebeautify.org | jsoneditoronline | Ours |
|---|---|---|---|---|---|
| Free & unlimited | ✓ | ✓ | ✓ | ✗ Limit | ✓ |
| No account needed | ✓ | ✓ | ✓ | ✓ | ✓ |
| Data stays in browser | ✗ | ✗ | ✗ | ✓ | ✓ |
| Syntax highlighting | ✓ | ✗ | ✓ | ✓ | ✓ |
| Minify option | ✓ | ✗ | ✓ | ✓ | ✓ |
| Custom indentation | ✓ | ✗ | ✗ | ✓ | ✓ |
| No ads | ✗ | ✗ | ✗ | ✓ | ✓ |
| File upload | ✓ | ✗ | ✓ | ✓ | ✓ |
Competitor information was accurate at time of publication and may have changed.
Guides & tutorials
How to Beautify and Format JSON Online for Free
Beautify, format, and validate JSON instantly in your browser. Pretty print with customizable indentation, convert to YAML/XML/CSV — no upload required.
How to Compare JSON Files Online for Free
Compare two JSON files side by side with a structural diff. See additions, deletions, and modifications highlighted in a collapsible tree — 100% in your browser.
Compare Two JSON API Responses
Paste two JSON API responses side by side and instantly see every structural difference. Perfect for debugging staging vs production, before/after deploys, and regression testing.
Diff JSON Config Files Between Environments
Compare JSON configuration files between dev, staging, and production to catch config drift. Structural diff highlights every missing key, changed value, and new addition.