About the JSON Formatter tool
JSON Formatter cleans up messy JSON so it is easy to read and debug. Paste raw JSON and beautify it with neat indentation, minify it to a single compact line, or validate it to catch errors. When something is wrong, the JSON Formatter points to the problem so you can fix it fast. Everything runs in your browser, keeping your data private.
How to use the JSON Formatter
- Paste your JSON into the box.
- Click Beautify to format it neatly, or Minify to compact it.
- Click Validate to check for errors.
- Copy the cleaned output for your project.
Features
- Beautify, minify, and validate in one place.
- Clear error messages when JSON is invalid.
- Handles large JSON structures.
- Private — nothing is uploaded.
- Free with no sign-up.
Your privacy
The JSON Formatter runs entirely inside your web browser. Your files and text are never uploaded to any server, so your data stays private on your own device — just like the workflow trusted on sites such as iLovePDF and Sejda, but with nothing leaving your computer.
Frequently asked questions
What does minify do?
Minify removes all whitespace to produce the smallest valid JSON, useful for APIs and configs.
Why is my JSON invalid?
Common causes are trailing commas, single quotes, or missing brackets; the error message shows where.
Is my data uploaded?
No, the JSON Formatter works entirely in your browser.