How to use json formatter
- Paste text into the editor. Inputs are limited to one million characters.
- Choose an operation where available, then run the tool.
- Review the result, copy it or save a text file.
A simple example
{"name":"Ada","active":true} becomes an indented object. Compare ignores object key order and lists changed JSON Pointer paths.
What to keep in mind
Strict JSON only: comments, trailing commas, duplicate keys, NaN/Infinity literals and nesting beyond 100 levels are rejected. Numbers retain their original digits, decimals and exponents; each numeric token is limited to 4096 characters. Comparison shows up to 200 differences.
Good questions. Clear answers.
Does my text leave the device?
No. This tool processes text in your browser and does not retain it.
Can I undo a change?
Your original input stays in the input editor. The result appears separately.