JSON Validator

Free JSON validator. Check whether your JSON is valid, get clear error messages with line and column numbers, and explore parsed data in a collapsible tree view.

Features

100% free to use
No signup or account required
Works directly in your browser
Private and secure processing

How to Use

1Open the JSON Validator tool
2Enter or paste your text
3Adjust any optional settings
4Copy your result instantly — free, no signup

Related Developer Tools

More free online tools you might find useful:

JSON Formatter

Beautify and validate JSON

Online Code Editor

VS Code-like editor with syntax highlighting and themes.

Responsive Checker

Check website on all devices

Password Generator

Create secure passwords

Base64 Converter

Encode/Decode Base64

URL Encoder/Decoder

Encode or decode URLs

Browse all Developer Tools