Text tools
100% Client-Side EngineJSON Formatter
Make JSON data easy to read and check it for mistakes. Your files stay on your device and are never uploaded.
Input
0 chars
0 words
0 lines
Output
0 chars
0 lines
How to use JSON Formatter
- Paste your JSON into the left box.
- Click "Prettify" to spread it out so it's easy to read, or "Minify" to squeeze it onto one line.
- If there's a mistake, a message tells you where to look. Otherwise, copy or download the result.
How it works
LayoutsEasy to read (2 or 4 spaces) or squeezed onto one line
Mistake checkTells you if your JSON has an error and where
Save your resultCopy to clipboard or download as a .json file
SpeedInstant
Privacy & Local Execution
Your JSON is formatted inside your browser. Passwords, keys, and settings you paste stay private.
Frequently Asked Questions
Does it check for mistakes?
Yes. If your JSON has an error, a message shows what went wrong and roughly where.
Is it safe to paste private data?
Yes. Everything happens in your browser — your data is never sent over the internet.