BurnerTools
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JSON Formatter & Validator
Validate & prettify JSON with precise error reporting.
Paste any JSON and instantly pretty-print, validate, or minify it. Errors point to the exact line and column — much faster than scrolling through chrome devtools output. Runs entirely in your browser, so API responses and credentials never leave your machine.
- Category
- Developer & Data
- Privacy
- Runs in your browser
- Uploads
- No server upload
- Access
- Free, no signup
Input
100% Private. Processed locally on your device. Your data never touches a server.
Output
Formatted JSON will appear here…How to use
- 1Paste JSON (or a JSON-ish blob with extra commas) into the editor.
- 2The tool auto-validates and reports line + column of any error.
- 3Click prettify for indented output or minify for a single-line payload.
- 4Copy the result to your clipboard.
Popular use cases
- →Debug API responses without piping through `jq` in a terminal.
- →Format webhook payloads pasted from CloudWatch or Stripe logs.
- →Validate a JSON config file before committing it.
Frequently asked questions
Is my JSON sent to a server?+
No. Parsing uses the native `JSON.parse` running in your browser.
Does it support JSON5 or comments?+
Standard JSON only. Strip comments before pasting, or use a JSON5-aware tool if you need them.