JSON Validator

What does JSON Validator do?

The JSON Validator checks whether text is valid JSON and points out errors such as missing commas, quotes or brackets.

How to use JSON Validator

1. Paste your JSON into the editor.
2. Press Validate.
3. Fix any reported error and validate again.

When is it useful?

• Check an API request body before sending it
• Find the error in a broken config file
• Validate data exported from another tool

Example

Common mistakes: trailing commas, single quotes instead of double quotes, and unquoted keys.

Good to know

• JSON (JavaScript Object Notation) stores data as objects in curly braces with "key": value pairs, and lists in square brackets. Keys and text values must use double quotes.

Frequently asked questions

Is JSON Validator free?

Yes. You can use it as often as you like without creating an account.

Is my text saved?

No. It is sent to our server only to create the result and is not stored. Like every tool on the site we keep a basic usage record (tool name, time, IP address and country); see our Privacy Policy.

Does it work on my phone?

Yes. It runs in any modern browser on a phone, tablet or computer - there is nothing to install.