JSON Formatter
Format, validate, and minify JSON with syntax highlighting. Detect and fix errors automatically.
Input
Output
Ready — paste JSON and click Format
Frequently Asked Questions
What is JSON Formatter used for?
JSON Formatter formats ugly or minified JSON into readable indented output with syntax highlighting. It's essential for debugging API responses, cleaning up configuration files, validating data exports from databases, and learning JSON structure from various sources.
What can I do with this tool?
Three main functions: Format — beautifies JSON with proper indentation for readability; Minify — compresses JSON by removing whitespace for production use; Validate — checks JSON syntax and reports errors with line and column numbers.
Is my data sent to a server?
No. All processing happens locally in your browser using JavaScript. Your JSON never leaves your device — zero server communication. Whether you're handling API keys, customer data, or proprietary information, it stays on your machine.
What keyboard shortcuts are available?
Press
Ctrl + Enter (or Cmd + Enter on Mac) to format JSON instantly. This speeds up workflow when processing multiple JSON snippets.How does error detection work?
When JSON has syntax errors, the tool displays the error message with exact line and column numbers. This makes it easy to locate and fix issues in large JSON files.
Is this free to use?
Yes. JSON Formatter is completely free with no sign-up required, no rate limits, and no ads. Use it as much as you need.