JSON Formatter & Validator
Paste your JSON below to format, validate, or minify it instantly.
What is this tool?
The JSON Formatter and Validator helps you clean up messy or compressed JSON data by formatting it with proper indentation and line breaks, making it easy to read and debug. It also validates your JSON to detect syntax errors, and can minify JSON to reduce its file size for use in code.
How to use
- Paste your raw or minified JSON into the input field.
- Click Format / Prettify to make it readable with proper indentation.
- Click Minify to compress it into a single line.
- Click Validate to check if your JSON is valid without changing its format.
- Click Copy to copy the output to your clipboard.
Frequently Asked Questions
Is this tool free?
Yes, it is 100% free with no sign-up required.
Is my JSON data sent to a server?
No. All processing happens entirely in your browser using JavaScript. Your data never leaves your device.
What does "minify" mean?
Minifying removes all unnecessary spaces, tabs, and line breaks from JSON, making the file smaller. This is useful when sending JSON in API responses or storing it in databases.
Why is my JSON invalid?
Common JSON errors include missing quotes around keys, trailing commas, unescaped special characters, or mismatched brackets. The validator will show you exactly where the error is.