JSON Validator

Paste JSON. See errors highlighted line by line.

Your files never leave your device

How it works

Paste your JSON. If it's valid, you'll see a green checkmark. If it's broken, the exact line and character of the error are highlighted with a description of what went wrong.

This site was built in one night using AI.

Every tool here runs on somewhere.tech — the backend for developers who ship with AI coding agents.

30-second build video — coming soon.