ToolRefinery
Home/Developer & data/JSON Validator

Validate JSON online

Check JSON validity locally and see a clear parse error when it fails.

Your file stays on your device.This tool processes supported files locally in your browser.

How this tool works

Paste JSON text and ToolRefinery parses it locally, reporting whether it is valid and a short structural summary when it is.

Input

Paste text directly into the tool. Maximum input length: 1953 KB.

Privacy

For this version, ToolRefinery processes the text you paste on your device. It is not sent to a ToolRefinery processing server.

More developer & data

JSON Formatter

Format and indent JSON in your browser with adjustable spacing.

JSON to CSV Converter

Convert a JSON array of objects into CSV in your browser.