Does it tell me where the error is?
Yes. It points to the spot where the JSON breaks.
Data tool
JSON Validator
Paste JSON or drag in a .json file to check whether it parses cleanly, find syntax errors, and inspect the top-level structure.
Runs Locally
This tool runs in your browser. Files never leave your device.
Drop a .json file here or paste raw JSON below.
Drag and drop a JSON file anywhere inside this input card.
Validation result
This JSON parses successfully.
Valid JSON
No syntax errors found. This file can be parsed with JSON.parse.
Type
Object
Size
243 B
Top-level items
4
Total values
13
Parsed preview
What this tool does
JSON Validator checks whether your JSON is valid and points you to what is wrong when it is not. Paste a snippet and it tells you if it parses cleanly, or flags the spot where a bracket, quote, or comma is breaking it, so you stop guessing why a file will not load.
How it works
Paste your JSON and the validator parses it in your browser and reports the result. If there is an error, it shows where the structure breaks so you can fix it. Nothing is uploaded.
When to use JSON Validator
Tracking down why a config will not parse
Checking JSON before sending it to an API
Validating output from a script or template
Confirming a snippet is well-formed before you commit it
FAQ
Does it change my JSON?
No. It only checks it. Nothing is modified.
Are my files uploaded anywhere?
No. Validation happens in your browser and the data never leaves your device.