Messy JSON is hard to read and debug. This formatter pretty-prints JSON with clean indentation, can minify it to one line, and validates it so you catch errors fast.
All processing runs in your browser, so your data is never uploaded.
How to use the JSON Formatter
- Paste your JSON.
- Choose beautify, minify or validate.
- Copy the clean result.
Format, validate and debug JSON
Minified JSON from an API is a single unreadable line. Formatting indents it into a readable tree, and validation pinpoints the exact position of syntax errors. The mistakes that break JSON are always the same few: a trailing comma after the last item, single quotes instead of double quotes, unquoted keys, and comments, which JSON does not allow at all.
Debugging faster
When an API call fails with a parse error, paste the payload here: the validator names the line and character where parsing stopped, which is usually one character after the actual mistake. Formatting also makes structural problems visible, like an object that should have been an array or a level of nesting that should not exist. Your data stays in the browser, so tokens and private payloads are never sent anywhere.
Common uses
- Making API responses readable during development
- Finding the exact character breaking a config file
- Minifying JSON before embedding or shipping
- Comparing structures of two payloads visually
Frequently asked questions
Is the JSON formatter free?
Yes, free with no signup.
Is my JSON uploaded?
No. Formatting happens locally in your browser.
Does it validate JSON?
Yes. It tells you if the JSON is valid and highlights errors.
Can it minify JSON?
Yes. You can pretty-print or minify to a single line.