JSON Formatter & Validator
Paste JSON to pretty-print, minify, inspect, and validate its syntax. Processing stays in the browser and input is never sent to an API by this tool.
Live preview
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What this generator does
- Pretty-print with 2 or 4 spaces.
- Minify JSON.
- Parse-error line/column display.
- Expandable tree view and path copy.
- 2 MB default input guard to protect the page.
How to use
- Paste JSON.
- Choose Format, Minify, or Validate.
- Fix any parse error shown by the editor.
- Use tree view for deeply nested data.
- Copy or download the result.
Best practices
- Do not paste secrets into tools you do not trust; this implementation is deliberately client-side.
- Preserve numeric and string values exactly when formatting.
Frequently asked questions
Does formatting change JSON values?
No. It changes whitespace only.
Can it repair invalid JSON automatically?
No. It explains the parse location rather than guessing what the data should mean.
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