Developer Tools

Format, decode, test, and generate for developers.

Subnet & CIDR, IP conversion, signal power, and transfer time — calculators for network engineers.

UUID, ULID, CUID2, and NanoID — generate in bulk and copy.

Pretty-print, minify, and validate JSON with clear error messages.

Visualize JSON as an interactive node graph — pan, zoom, and explore nested data.

Decode a JSON Web Token's header and payload and read its claims.

Build and sign a JSON Web Token with HS256, HS384, or HS512.

Test regular expressions with live match highlighting, groups, and flags.

Other categories