✍️ Text & Writing
JSON Formatter / Validator
Format JSON with two-space indentation, minify it into a compact string, or validate syntax with the browser native JSON parser. Errors are shown clearly in the output area.
How to use
- Paste JSON into the input area.
- Press Format to pretty-print with two-space indentation.
- Press Minify to produce compact one-line JSON.
- Press Validate to check syntax without changing the original input.
Use cases
- Make API responses easier to read during debugging.
- Minify configuration JSON before pasting it into a compact field.
- Check sample JSON in docs, lessons, or test fixtures.
Privacy & local processing
This tool runs mainly in your browser. The content you enter is not sent to Free Tools Hub servers.
FAQ
- Does this repair invalid JSON?
- No. It uses the standard JSON parser and reports errors instead of guessing how to fix them.
- Are comments or trailing commas supported?
- No. Standard JSON does not allow comments or trailing commas, so the validator reports them as errors.
- Is my JSON uploaded?
- No. Parsing and formatting run locally in your browser.
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