JSON Formatter & Validator
Format, validate and minify JSON
Runs in your browser Instant results 100% free
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About the JSON Formatter & Validator
Paste JSON from an API, schema markup or a config file to make it readable, check that it is valid, or minify it. If there is an error, you see the message with the line and column so you can fix it quickly.
How to use it
- Paste your JSON.
- Click Format or Minify and choose the indent.
- Copy the result, or fix the error shown.
Frequently asked questions
Why is my JSON invalid?
Common causes are trailing commas, single quotes instead of double quotes and missing brackets.
Is my data sent to a server?
No, everything runs in your browser.
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