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Json validator

World's simplest json tool

Free online JSON validator. Just load your JSON and it will automatically get validated. There are no ads, popups or nonsense, just an awesome JSON validator. Load JSON, validate JSON. Created by developers for developers.
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Json validator tool What is a json validator?
This tool validates JavaScript Object Notation (JSON) file. In case of typos or syntax error this tool will tell you what went wrong. Sometimes it's just so hard to find a tiny missing comma or a missing quote. This tool will help!
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Json validator examples Click to use
Invalid JSON
Invalid JSON file, which displays an error.
{ "foo": 'bar' }<invalid json>
Valid JSON
Valid JSON file without any errors.
{ "foo": "bar" }<valid json>
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Pro tips Master online json tools
You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!
https://onlinejsontools.com/validate-json?input=%7B%0A%20%20%22foo%22%3A%20%27bar%27%0A%7D
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