Is the Contrast tool free?

Yes — the Contrast tool is completely free with no sign-up and no usage limits.

Do you upload my images?

No. The Contrast tool runs entirely in your browser, so your images are never uploaded or stored on a server.

After the page loads once, the Contrast tool works offline as a progressive web app.

Yes — any modern mobile or desktop browser with canvas support can run the Contrast tool.

on-device

The ◐ Contrast tool runs entirely in your browser — no uploads, no cloud processing, everything stays on your device.

Drop an image, or click to choose

Everything runs locally in your browser.

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