Developer utilities
The everyday conversions and generators, done properly and done privately. Every one of these runs entirely in your browser — paste a token, a password or sensitive data and it never leaves your machine.
Subnet Calculator
CIDR to range, mask, hosts and more.
IP ⇄ Binary / Decimal Converter
Convert an IPv4 address between dotted, binary and integer.
Unix Timestamp Converter
Epoch seconds to a human date, and back.
Cron Expression Generator
Build and read crontab schedules in plain English.
Base64 Encode / Decode
Text ⇄ Base64, in the browser.
JWT Decoder
Read the header and payload of a JSON Web Token.
UUID Generator
Generate v4 UUIDs.
Password Generator
Strong random passwords, generated locally.
URL Encoder / Decoder
Percent-encode text for URLs, and back.
Hash Generator
SHA-1, SHA-256, SHA-384 and SHA-512 of any text.