Browser-based utilities — no data leaves your machine.
Compare two text blobs with inline highlights, folding, and fast diff navigation.
Subnet masks, host ranges, broadcast addresses from CIDR notation.
Format, minify, and validate JSON with syntax highlighting.
Test regular expressions with live match highlighting and group capture.
Inspect headers for cache behavior, compression, and security posture.
Decode and inspect JWT tokens — header, payload, and expiry.