JSON Formatter & Beautifier

Format, beautify and validate JSON online for free. Instant pretty-printing with syntax highlighting and error detection. No signup required.

Your data never leaves your browser

JSON Validator

Check if your JSON is valid with detailed error messages

JSON Minifier & Compressor

Remove whitespace from JSON to reduce its file size

JSON Diff & Compare

Compare two JSON objects and highlight differences

JSON ↔ YAML Converter

Convert between JSON and YAML formats instantly online

Frequently Asked Questions

How do I format JSON online?

Paste your JSON in the input field. ToolHive will instantly format it with proper indentation and syntax highlighting. Click "Format" to apply 2-space or 4-space indentation.

Is my JSON data safe?

Yes. All processing happens in your browser using JavaScript. Your data is never sent to any server.

What is the difference between formatting and minifying JSON?

Formatting (beautifying) adds indentation and line breaks to make JSON human-readable. Minifying removes all whitespace to reduce file size for production use.