Developer & Text Utilities · Free
JSON Formatter & Validator
Format messy JSON so it is easy to read, minify it for production, and find syntax errors quickly.
Use the JSON Formatter & Validator
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How to use the JSON Formatter & Validator
- Paste your JSON.
- Choose an indentation and whether to sort keys.
- Press Format, Minify or Validate.
- Copy the result or download it as a .json file.
About this tool
The tool uses your browser's built-in JSON parser, so it follows the official JSON standard exactly. Errors show the line and column so you can fix them fast.
Free to use. Your inputs are processed in your browser and are not sent to our servers. Results are for general information; see the disclaimer.
Frequently asked questions
Why does my JSON fail with single quotes?
Standard JSON requires double quotes around keys and text values. Single quotes and trailing commas are common causes of errors.
Is my data sent anywhere?
No. It is processed in your browser and not uploaded to our servers, so it is safe for configuration files.
How large a file can I format?
Several megabytes is fine on most devices. Very large files depend on your device's memory.