JSON Formatter
Format, validate and minify JSON with syntax highlighting, right in your browser.
Valid JSON · 6 lines · 109 B
How the JSON formatter works
This tool validates the JSON you type or paste and shows a descriptive error if the syntax is incorrect. Everything happens locally in your browser — no data is ever sent to a server.
Use the Format button to rearrange the JSON with readable indentation (2 or 4 spaces, or a tab) and the Minify button to strip whitespace and line breaks, producing a compact version for production.
Frequently asked questions
Is the JSON I paste sent to any server?
No. Validation, formatting and minification all happen entirely in your browser.
How do I know if my JSON is valid?
The tool validates the content automatically as you type. If there's a syntax error, a descriptive message appears below the editor.
What's the difference between Format and Minify?
Format rearranges the JSON with indentation and line breaks for readability. Minify removes all extra whitespace, producing the smallest possible file size.
Can I choose the indentation style?
Yes. Use the selector at the top to choose between 2 spaces, 4 spaces or a tab before clicking Format.
Related tools
- Text EditorRich formatting with PDF, DOCX and HTML export
- Text ComparatorCompare 2 to 4 texts side by side and see the differences
- Code EditorSyntax highlight for HTML, CSS, JS, Python and more
- SCORM DebuggerTest and debug SCORM 1.2 packages in your browser, nothing is uploaded