Developers calculators

Number bases, Base64, colours, timestamps, passwords, UUIDs and subnets.

Tools in this category

Random passwords with calculated entropy, generated in your browser.

Convert numbers between bases 2, 8, 10, 16, 32 and 36.

Turn text into Base64 and recover the original text.

Convert between Unix timestamps and readable UTC dates.

Everyday programming utilities gathered in one place so you don't need five browser tabs open.

The password and UUID generators use the browser's cryptographic random source; nothing travels over the network.