JSON Formatter
Runs in your browser- Paste your raw or minified JSON into the input field.
- Click Format to beautify it with proper indentation.
- Copy the formatted output or fix any validation errors shown.
What is JSON Formatting?
JSON (JavaScript Object Notation) is the most common data interchange format on the web. Raw JSON from APIs, logs, or config files is often minified â all whitespace removed to save bytes. This makes it nearly impossible to read.
A JSON formatter (also called a JSON beautifier or pretty printer) takes compressed JSON and adds proper indentation, line breaks, and spacing so you can quickly understand the structure. Our formatter also validates your JSON, catching syntax errors like missing commas, unmatched brackets, or trailing commas.
Why Use This JSON Formatter?
Unlike other online JSON tools, devformat.tools runs 100% in your browser. Your data never leaves your machine â there's no server processing, no logging, no data collection. This makes it safe for formatting sensitive API responses, config files with credentials, or any JSON you wouldn't want to send to a third-party server. The formatter handles files of any size with instant results and gives you one-click copy to clipboard.