Free json formatter & validator for developers. Essential development utilities at your fingertips. Fast, easy to use, and 100% free.
Working with raw JSON data can be messy. The JSON Formatter & Validator is an essential tool for developers and data analysts. Whether checking an API response, cleaning configuration files, or decoding minified data, this tool creates a readable hierarchical tree. It runs 100% in your browser for privacy.
Copy your raw JSON string and paste it into the left editor.
Click 'Beautify' to indent and format nicely, or 'Minify' to remove whitespace/compress.
If the JSON is invalid, an error message will appear explaining exactly what's wrong.
No. This tool runs entirely in your browser using JavaScript. Your sensitive data remains private.
It validates and points out errors, but it (intentionally) avoids 'auto-fixing' to prevent data corruption. You must correct the syntax yourself.
Toggle advanced mode to see more detailed inputs and configuration options for precise calculations.
Download your calculation results as PDF or CSV, or share them directly with others.
Our calculators use industry-standard formulas to ensure 100% accuracy for all your needs.