UUID generator

Generate strong random passwords with letters, numbers and symbols. Shows strength in bits. Created on your device — never sent anywhere.

Calculate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text or files, and check a download against a known checksum. Private.

Convert Unix timestamps (seconds or milliseconds) to UTC, local time and ISO 8601, and dates back to epoch time. Free for developers.

Convert colours between HEX, RGB, HSL and CMYK, pick a colour visually and check WCAG contrast on white and black. Free for designers.

Create QR codes for links, text, Wi-Fi and email. Choose colours and size, then download PNG or SVG. Free forever, no watermark, codes never expire.

Create barcodes online: Code 128, EAN-13, EAN-8, UPC-A, Code 39 and ITF-14 with automatic check digits. Download PNG or SVG. Free, no sign-up.