JSON Formatter and Validator
Paste or upload JSON to instantly beautify, minify, and validate it. Everything runs in your browser, so your data stays private. When your JSON is clean, you can copy it, download it, or turn it into a spreadsheet in one click.
100% private, runs in your browserFree, no sign-up
Your JSON is formatted entirely in your browser. Nothing is uploaded to any server.
From JSON to a spreadsheet
Need your JSON in Excel, CSV, or as a clean table? Once it is valid here, convert it:
Frequently Asked Questions
- Is my JSON uploaded anywhere?
- No. The formatting, minifying, and validation all happen in your browser using JavaScript. Your JSON never leaves your device, which makes it safe for sensitive or proprietary data.
- What is the difference between format and minify?
- Format (beautify) adds indentation and line breaks so the JSON is easy to read. Minify removes all unnecessary whitespace to make the smallest possible file, which is useful for sending over a network or embedding in code.
- How does it validate JSON?
- It parses your input with the standard JSON parser. If anything is wrong (a missing comma, bracket, or quote), it shows a clear message and, when available, the line and column of the problem.
- Can I convert this JSON to Excel or CSV?
- Yes. Once your JSON is valid, use the JSON to Excel or JSON to CSV converter to turn it into a spreadsheet. Nested objects are flattened into columns automatically.
- Is there a size limit?
- You can format files up to 50 MB. Very large files may take a moment because everything runs locally in your browser.