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.

Password generator

Create strong random passwords.

Passphrase generator

Memorable multi-word passphrases.

UUID generator

Generate v4 UUIDs / GUIDs.

Hash generator

MD5, SHA-1 and SHA-256 hashes.

Color picker

Pick a color, get HEX / RGB / HSL.

Color palette generator

Harmonies and image extraction.

CSS gradient generator

Build linear/radial gradients.

Color contrast checker

Check WCAG contrast ratios.

Aspect ratio calculator

Resize while keeping proportions.

Domain name generator

Brandable domain ideas from a keyword.

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 (also known as a GUID generator) 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

Are these generators really free?

Yes. Every tool here is free, needs no sign-up, and runs entirely in your browser.

How random is "random" here?

Password, passphrase, UUID and hash generators use the browser's cryptographically-secure WebCrypto API. They're suitable for production secrets.

Are passwords or generated values sent anywhere?

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.