Toollio

JSON Formatter & Validator

Format, beautify, and validate JSON data instantly.

Indentation:

About this tool

JSON (JavaScript Object Notation) is a lightweight data-interchange format. This tool takes raw or minified JSON and formats it with proper indentation to make it human-readable. It also validates your JSON and highlights syntax errors. Paste minified JSON from an API response or a config file to instantly see its structure. All formatting is done in your browser — your data never leaves your machine.