Practical utilities for devs, engineers & tech lovers • 100% free & private
Click any card → get the tool in a clean modal. Everything runs in your browser. Zero tracking, zero bullshit.
Length, weight, speed, temp & more
Bytes ↔ KB ↔ MB ↔ GB (binary & decimal)
File size + speed = real time estimate
HEX ↔ RGB ↔ HSL + live preview
Live matching, groups & explanation
Encode / decode strings & data
Pretty-print, minify, validate
Strong, custom passwords
CIDR, hosts, network range
SHA-256 of any text