JSON Validator
Check if JSON is valid. Find mistakes in JSON before you use it in an app or API.
How to use JSON Validator
- Paste or type your text in the box. You can also upload a file where the tool allows it.
- Press the main button of the tool.
- Read the result below, then copy or download it.
Features
- Free to use with no signup
- Works on phones, tablets and computers
- Runs in your browser, so your data stays on your device
- Nothing to install
Frequently asked questions
What does an error message mean?
It shows where the parser stopped. Common causes are a missing comma, single quotes instead of double quotes, or a trailing comma.
Is my data safe?
This tool runs inside your browser. Your text and files are not uploaded to our server.