JSON formatter
Format, validate and minify JSON data right in your browser. Free, private, no sign-up.
About the JSON formatter
JSON is the most common format for exchanging data between websites, apps and servers. When it arrives as a single long line, it is almost impossible to read, and one missing comma can break a whole program. This free JSON formatter makes your data readable and checks it for mistakes at the same time.
Paste your JSON into the box and click Format to add clean indentation, or click Minify to remove all extra spaces and shrink the size. If the data is not valid, the tool shows a clear error message so you can find and fix the problem quickly. Common errors include trailing commas, single quotes instead of double quotes, and missing quotes around keys. Developers, testers and students use it when working with APIs, configuration files and databases. Your data is processed locally in your browser and is never uploaded, which makes it safe for sensitive information. It is free and needs no sign-up.
How to use
Paste your JSON into the box. Click Format to indent it so it is easy to read, or Minify to remove extra spaces. If the JSON has a mistake, the tool shows an error message so you can fix it.
Frequently asked questions
- What is JSON?
- JSON is a text format for storing and sharing data, widely used by websites and apps.
- Why does my JSON show as invalid?
- Common causes are trailing commas, single quotes instead of double quotes, and keys without quotes.
- Is my data uploaded?
- No. Formatting happens in your browser and your data stays on your device.
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