JSON Formatter
Use this free online JSON Formatter to format JSON with custom indentation, sorted keys and error highlighting. It works instantly in your browser, and your data never leaves your device.
About the JSON Formatter
A JSON formatter takes raw JSON text and lays it out with consistent spacing. You can choose 2 spaces, 4 spaces or tabs, sort keys alphabetically for easier comparison, and instantly see if the document is valid.
Also known as: format json, json format online, json pretty formatter.
How to use the JSON Formatter
- Paste your input into the box above, upload a file, or click Sample to try an example.
- Pick any options you need. The JSON Formatter processes your input instantly as you type.
- Click Copy to copy the output or Download to save it as a file.
Features
- Free with no signup and no daily limits
- Private: runs entirely in your browser
- Works on mobile, tablet and desktop
- Upload files and download results
- Live results as you type, with clear error messages
- Clean, fast interface with no popups
Frequently asked questions
Is the JSON Formatter free to use?
Yes. The JSON Formatter is completely free with no signup, no limits on normal use and no watermark.
Is my data safe?
Yes. Everything is processed by JavaScript inside your own browser. Your text is never uploaded to our server or stored anywhere.
Why does it say my JSON is invalid?
The most common reasons are single quotes instead of double quotes, a trailing comma after the last item, keys without quotes, or comments. The error message shows the exact line and column so you can fix it quickly.
Can I upload a JSON file?
Yes. Click Upload to open a .json or .txt file from your device, or paste the content directly. You can download the result as a file.
What else is this tool called?
People also search for it as format json, json format online, json pretty formatter. It is the same free tool.