About the JSON Formatter tool
JSON (JavaScript Object Notation) is the language APIs, configuration files and modern apps use to exchange data. Machines love it compressed onto one line; humans need it indented to read it. And a single missing comma or extra quote breaks the whole thing. JSON Formatter fixes all of that.
Paste any JSON and click Format to get clean, consistently indented output with 2 spaces, 4 spaces or tabs. Validate tells you instantly whether the JSON is correct and, if not, points to the line and column of the problem. Sort keys orders object properties alphabetically, which makes two versions much easier to compare, and Minify strips whitespace for the smallest possible payload.
How to format JSON
- Paste your JSON into the input box.
- Click Format / Beautify, Minify, Sort keys or Validate.
- If there is an error, use the line and column shown to fix it.
- Copy the result or download it as a .json file.
Why use Wartatren.biz.id JSON Formatter?
Clear error messages
Syntax errors are reported with line and column numbers.
Beautify or minify
Readable indentation for debugging, compact output for production.
Sort keys
Alphabetical ordering makes diffs and reviews far easier.
Private
API responses with tokens or personal data stay in your browser.
When is it useful?
Developers use it to inspect API responses, debug configuration files, clean up data before committing it to a repository, and minify JSON for web apps. Testers compare payloads by sorting keys, and analysts tidy exported data. Need to encode the JSON for a URL or header? Try Base64 Encode/Decode.
Frequently asked questions
What are the most common JSON errors?
Trailing commas after the last item, single quotes instead of double quotes, unquoted property names, and comments. Standard JSON allows none of these.
Is my JSON sent to a server?
No. Formatting and validation use your browser's built-in JSON engine, so sensitive data never leaves your device.
Can it handle large files?
Yes. Several megabytes of JSON format in well under a second on a typical computer.
Does sorting keys change my data?
No. Objects in JSON are unordered by definition, so sorting changes the presentation only. Array order is always preserved.