JSON Formatter, Minifier & Validator Online

How to use JSON Formatter

• Paste or type raw JSON into the left Input panel.
• Select your preferred indentation (2 spaces or 4 spaces) from the dropdown.
• Click 'Format' to pretty-print the JSON in the Output panel, or click 'Minify' to compress it.
• Real-time validation runs as you type — the status bar shows Valid (green) or Invalid (red) with exact error line.
• Click 'Copy' on the output panel to copy the result to your clipboard.

Edge Cases & Limitations

• Trailing commas are not valid JSON and will be flagged as a syntax error.
• Single-quoted strings are not valid JSON — use double quotes.
• Very large JSON files (50MB+) may slow down formatting due to browser memory limits.

Keyboard Shortcuts

• Ctrl/Cmd + K — Open Command Palette to switch tools instantly.