Yes, all core tools are free for personal and professional use.

Do you store my data?

Browser tools process data locally. Server tools handle requests temporarily; only aggregated stats may be stored.

How do I get started?

Pick a tool from the homepage or search by name, then follow the instructions on the tool page.

Use the language toggle at the top of the page to switch editions.

Tools developer

Compute WCAG 2.x contrast ratio between two colors — fully local.