JSON Formatter & Validator – Online Tool
Free JSON formatter and JSON validator. Format, validate, beautify, or minify JSON and JSON5. Real-time validation and syntax highlighting—no sign-up required.
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FAQ
- What is a JSON formatter?
- A JSON formatter (or beautifier) takes minified or compact JSON and outputs it with indentation and line breaks so it's easy to read and edit. This tool formats JSON and JSON5 instantly in your browser.
- What is a JSON validator?
- A JSON validator checks whether a string is valid JSON (or JSON5) and reports syntax errors with line and position. This tool validates in real time as you type and shows clear error messages.
- What is JSON5?
- JSON5 extends JSON with comments, trailing commas, unquoted keys, and other conveniences. This tool validates JSON5 and can convert it to standard JSON for use in APIs and configs.
- Is my JSON stored or sent to a server?
- No. Formatting and validation run entirely in your browser. Nothing is stored or sent to any server.
- Can I minify JSON here?
- Yes. Use the minify option to produce compact, single-line JSON from formatted input—useful for APIs or reducing file size.