The Tool
JSON formatter & validator
Paste JSON and choose an action.
Free Online JSON Formatter, Validator & Minifier
The ToolHavenHub code formatter helps developers clean up and validate JSON in seconds. Paste raw or messy JSON from an API response, log file or config, and instantly beautify it with proper indentation, or minify it into a single compact line for production. The validator tells you exactly where and why parsing fails, so you can fix syntax errors fast.
Everything runs locally in your browser — your data never leaves your device, which makes it safe for sensitive payloads and tokens. It is completely free, works on mobile, and needs no signup.
How to use
- Paste your JSON into the input box.
- Choose an indent size, then click Format, Minify or Validate.
- Copy the clean output with one click.
Frequently Asked Questions
- Does it support minify and beautify?
- Yes. Format adds readable indentation; Minify strips whitespace into one line.
- Is my code uploaded?
- No. All processing runs in your browser — nothing is sent to a server.
- Which formats are supported?
- This tool focuses on JSON formatting, validation and minification.
- Is it free?
- Yes, 100% free with no signup and no limits.