420300.xyz

Edit, validate, compare, and copy strict JSON

Paste JSON into the browser to format, diagnose, diff, search, replace, browse, and copy strict JSON output

Accepts common config-style comments and trailing commas
Structural diff by default, with text diff for raw changes
Warnings for duplicate keys and unsafe integer precision
No upload or file I/O in the first version; data moves by paste and clipboard copy

Is the copied export strict JSON?

Yes. Copying strict JSON removes comments and trailing commas so the output can be accepted by strict JSON parsers

Structural diff ignores formatting by default and compares arrays by index. Switch to text diff when whitespace, comments, or raw line changes matter

No upload is performed. The first version uses paste input and clipboard copy output, without file upload, drag-and-drop, or download