JSON Prettier
Format, validate, and minify JSON in your browser. Nothing is uploaded or stored.
About JSON Prettier
Paste raw or minified JSON to instantly format, validate, and beautify it with proper indentation. Catch syntax errors as you type and minify when you need a compact payload — all processed locally in your browser.
Features
- Beautify JSON with configurable indentation
- Validate syntax with clear, line-aware error messages
- Minify JSON into a compact single-line payload
- Copy or download results without uploading anything
How to use
- 1Paste or type your JSON into the input area.
- 2Choose to beautify or minify the output.
- 3Copy the formatted result or download it as a file.
Frequently Asked Questions
Is my JSON uploaded to a server?
No. All formatting and validation happens entirely in your browser, so your data never leaves your device.
Does it work with large JSON files?
Yes. Processing runs locally and handles large documents well, with validation feedback as you edit.
Can I minify JSON too?
Yes. Switch to minify mode to strip whitespace and produce a compact single-line payload.
Related Formatters
- JSON ValidatorValidate JSON syntax and inspect structure.
- JSON ViewerExplore JSON as a collapsible tree.
- SQL FormatterFormat and beautify SQL queries.
- XML/HTML PrettifierFormat and beautify XML or HTML code.