What kind of errors does it catch?

Common issues like trailing commas, missing quotes, unmatched brackets, and invalid data types are all reported.

Does it tell me where the error is?

Yes. The validator reports the position of the syntax error so you can jump straight to the problem.

Is this the same as the JSON Formatter?

They're related — the Formatter beautifies and auto-repairs JSON, while the Validator focuses on strict pass/fail syntax checking with error details.

JSON Validator

Check any JSON payload for strict syntax validity and get a clear error message pointing to exactly what's wrong.

JSON to validate

Overview

Check any JSON payload for strict syntax validity and get a clear error message pointing to exactly what's wrong.

Benefits

Clear, specific error messages
Instant validation, no upload needed
Useful before sending API payloads
Free with no size restrictions for typical use

Use Cases

Validating API request/response payloads
Checking config files before deployment
Debugging webhook data
Verifying JSON before importing to a database

Users Also Use

How to Use

Paste the JSON you want to validate.
Click Validate to check syntax.
Read the reported error message and line, fix it, then re-validate.

FAQ

What kind of errors does it catch?: Common issues like trailing commas, missing quotes, unmatched brackets, and invalid data types are all reported.
Does it tell me where the error is?: Yes. The validator reports the position of the syntax error so you can jump straight to the problem.
Is this the same as the JSON Formatter?: They're related — the Formatter beautifies and auto-repairs JSON, while the Validator focuses on strict pass/fail syntax checking with error details.

About JSON Validator

Quickly verify JSON from APIs, webhooks, and config files before deployment. Get a clear, specific error message the moment something breaks strict JSON syntax, instead of guessing which character is wrong.