Yes, all ZapFile tools are completely free with no hidden costs or subscriptions.

Absolutely. All processing happens directly in your browser. Your files are never uploaded to any server.

Do I need to create an account?

No. ZapFile requires no registration, login, or account creation.

Does this tool work offline?

Most tools work offline after the first load. ZapFile is a Progressive Web App you can install.

Yes! All tools are fully responsive and work on mobile devices.

Pick colors from a picker, the screen or an image; convert HEX, RGB, HSL, OKLCH and build scales

RGBA%

Any CSS colorClosest CSS name: gold

Contrast as text

Aa on white

1.41:1AAAAA

Aa on black

14.88:1AAAAA

WCAG: AA needs 4.5:1 and AAA needs 7:1 for normal text.

Tints and shades

A 50–950 ramp with the same hue, built in OKLCH. The outlined step is your color.

Color harmony

Recent colors

Colors you settle on appear here.

The page link always carries the current color, so you can share it.

Runs on your device, not our servers

This page uses browser APIs (Canvas, WebAssembly, workers, etc.) so your files stay on your machine.

Processing happens in this tab — close the tab and the session ends.
No ZapFile account is required and we do not store your uploads (there are none).
Download only what you choose; nothing is sent to us for “cloud processing.”
Verify it yourself: DevTools → Network while using a tool — you should not see your file bytes uploaded to ZapFile.
Add ZapFile to your home screen for a faster app shell and offline access to cached pages (tools still need a capable browser).