Format & Beautify
Turn compact or messy JSON into clean, readable and properly indented JSON.
JSON Formatter & Validator
Format, validate and minify JSON directly in your browser. Your JSON stays on your device.
JSON Formatter
Paste your JSON below to get started.
Input0 chars · 0 lines
Output0 chars · 0 lines
Ready
Privacy first: Your JSON is processed in your browser. SontuCode does not upload or store your JSON on its servers. If you use Save, your JSON is stored locally in your browser.
Everything You Need to Work With JSON
Simple, fast and privacy-friendly tools for formatting, validating and working with JSON.
Validate JSON
Quickly check your JSON for syntax errors and identify invalid JSON input.
Minify JSON
Remove unnecessary spaces and line breaks to create compact JSON.
Instant Results
Process your JSON directly in the browser and get results instantly.
Privacy First
Your JSON is processed in your browser and is not stored by SontuCode.
Copy & Download
Copy your result to the clipboard or download formatted JSON as a file.
JSON Formatter & Validator
What is a JSON Formatter?
A JSON formatter makes JSON data easier to read by adding consistent indentation, spacing, and line breaks. This is especially useful when working with API responses, configuration files, logs, and other structured data.
How to Format JSON Online
Paste your JSON into the input editor above and choose Format. The formatter validates the JSON and displays a readable, properly indented version in the output editor. You can then copy or download the formatted result.
JSON Formatter vs JSON Validator
A JSON formatter improves the readability of valid JSON, while a JSON validator checks whether the data follows valid JSON syntax. This tool combines both capabilities so you can format your JSON and identify syntax errors in the same place.
JSON Formatter vs JSON Minifier
Formatted JSON uses indentation and line breaks to make data easier for people to read. Minified JSON removes unnecessary whitespace to produce a smaller representation that can be useful when transferring or storing JSON.
Is My JSON Data Uploaded?
Your JSON is processed directly in your browser. The application does not upload your JSON to a SontuCode server for formatting or validation. If you use the Save feature, the saved JSON is stored locally in your browser.
Frequently Asked Questions
Everything you need to know about formatting, validating, and working with JSON using SontuCode.
A JSON formatter takes compact or poorly formatted JSON and adds indentation, spacing, and line breaks so the data is easier to read and understand.
SontuCode is designed to be fast, simple, privacy-friendly, and easy to use. You can format, validate, beautify, and minify JSON without creating an account or sending your JSON to our servers. Your data is processed directly in your browser and stays on your device. SontuCode does not store your JSON data in our application or on our servers.
No. The formatter is designed to process your JSON directly in your browser. Your JSON does not need to be uploaded to a SontuCode server for formatting or validation.
Yes. After formatting your JSON, you can copy the result to your clipboard or download it as a JSON file.
Yes. The SontuCode JSON Formatter and Validator is free to use directly in your browser.
The validator identifies that the JSON is invalid and provides an error message to help you locate the problem. Common issues include missing commas, unmatched brackets, invalid quotes, and incorrect JSON syntax.