Data tool / JSON
JSON Formatter
Turn dense JSON into readable, validated data without sending it to a server.
100% processed in your browser
Input
153 charsResult
How to use it
- 1 Paste JSON into the input panel.
- 2 Choose Format, Minify, or Sort keys.
- 3 Copy or download the validated result.
Useful for
- Reviewing API responses
- Cleaning configuration files
- Finding invalid JSON syntax
Good to know
- Standard JSON only; comments are not supported.
- Very large documents may be limited by device memory.
- Input is cleared when you leave or refresh the page.
Questions
JSON Formatter FAQ
Does the JSON Formatter upload my data?
No. Formatting, validation, minification, and key sorting run entirely inside your browser.
Can it format JSON with comments?
No. The tool accepts standard JSON only, so comments and trailing commas are reported as invalid syntax.
Does sorting keys change array order?
No. Sorting changes object key order recursively but preserves the original order of array items.
Continue locally
Related tools
Keep working with another browser-only tool. Your files and tool inputs stay on your device.