Generators
Produce IDs, secrets, colors and random test data — cryptographically secure where it matters, never uploaded anywhere. Useful for production code, design systems, and the placeholder data that fills a thousand staging environments.
Create strong random passwords.
Memorable multi-word passphrases.
Generate v4 UUIDs / GUIDs.
MD5, SHA-1 and SHA-256 hashes.
Realistic names for test data.
Unique handles from word pairs.
Pick a color, get HEX / RGB / HSL.
Harmonies and image extraction.
Build linear/radial gradients.
Check WCAG contrast ratios.
Resize while keeping proportions.
Brandable domain ideas from a keyword.
Convert pixels to rem for any root size.
Convert rem back to pixels.
Convert pixels to em for any parent size.
Convert RGB colors to HEX.
Convert HEX colors to RGB and RGBA.
Generate v4 GUIDs / UUIDs.
Crypto-secure random numbers in any range.
Picking the right generator
For credentials, the password generator produces strong random strings while the passphrase generator builds memorable word-list passphrases. For identifiers, the UUID generator (and its GUID alias) emits standards-compliant v4 IDs; the hash generator covers MD5, SHA-1 and SHA-256. For design, color picker, palette, gradient, and contrast cover the WCAG-conscious palette workflow.
Frequently asked questions
- Yes. Every tool here is free, needs no sign-up, and runs entirely in your browser.
- Password, passphrase, UUID and hash generators use the browser's cryptographically-secure WebCrypto API. They're suitable for production secrets.
- No. Everything is produced locally — strict CSP forbids outbound requests on generator pages, so even if a third-party script tried to exfiltrate, the browser would block it.