JSON Formatter
Beautify, minify and validate JSON locally in your browser.
Processing runs locally in your browser. Toolexa does not upload or permanently store your input.
About JSON Formatter
JSON Formatter is a free developer tool for cleaning, validating and compressing JSON without uploading your data. Paste a JSON object, array, API response, configuration snippet or test payload into the editor, then choose Beautify JSON to create readable indentation or Minify JSON to remove extra spaces for compact storage and transport. The same page can validate JSON and show a clear error message with an approximate line number when parsing fails. This makes it useful for debugging API responses, preparing documentation examples, checking webhook payloads, reviewing app settings and cleaning copied data before sharing it with teammates. All processing happens in your browser with JavaScript, so Toolexa does not permanently store the JSON you enter. The output can be copied or downloaded as a .json file, and Clear resets both panels for another payload. The layout follows Toolexa’s standard responsive tool design, so it is comfortable on desktop screens while still usable on mobile when you need a quick formatting check.
How to use JSON Formatter?
- Paste JSON into the input editor.
- Click Beautify JSON, Minify JSON or Validate JSON.
- Review the formatted output or validation message.
- Use Copy Result or Download .json when you need the output.
- Click Clear before working with another JSON payload.
- Open the tool page and read the input labels carefully.
JSON Formatter Features
- Beautify JSON with readable indentation
- Minify JSON for compact output
- Validate JSON before using it
- Show error line number for invalid JSON
- Copy formatted or minified output
- Download output as a .json file
- Clear input and output instantly
JSON Formatter FAQs
Does JSON Formatter upload my JSON?
No, formatting and validation run locally in your browser.
Can it minify JSON?
Yes, click Minify JSON to remove unnecessary whitespace.
Will it show JSON errors?
Yes, invalid JSON displays a parse message and approximate line number.
Can I download the formatted JSON?
Yes, use Download .json after generating valid output.
What JSON inputs are supported?
Objects, arrays, strings, numbers, booleans and null are supported when they follow valid JSON syntax.