JSON Formatter & Validator
Pretty-print, validate, or minify JSON. Errors are reported with the reason.
Paste messy or minified JSON and instantly pretty-print, validate, or minify it. Syntax errors are pinpointed, and your data never leaves your browser.
How to use JSON Formatter
- Paste your JSON into the editor.
- Choose Beautify to indent it, or Minify to compact it.
- If the JSON is invalid, the error and its location are shown.
- Copy the cleaned-up result.
Frequently asked questions
Is my JSON sent to a server?
No. All parsing and formatting happens locally in your browser, which makes it safe for sensitive or proprietary data.
What indentation does it use?
It pretty-prints with standard 2-space indentation, the most common convention for readable JSON.
Why does it say my JSON is invalid?
Common causes are trailing commas, single quotes instead of double quotes, or a missing bracket. The error message points to the position so you can fix it quickly.
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