Map a photo to two colours for a bold Spotify-style look — pick shadow and highlight colours, previewed live on your device.
Two-tone effect applied on your device — nothing is uploaded
No size limit · files are processed on your device and never uploaded · how it works
Runs in your browser. Files are never uploaded — you can go offline after the page loads.
Drop files, pick options, download. Whole folders at once, no signup, no daily limit.
The same engines the professionals use — SVGO, resvg, MozJPEG, libwebp, libavif — compiled to run in your browser.
Files are processed on your device and never uploaded. Close the tab and nothing remains anywhere.
Duotone maps a photo’s dark areas to one colour and its light areas to another, blending smoothly between — the bold, unified style Spotify made famous. Pick a preset or set your own shadow and highlight colours, nudge the contrast, and it previews live.
The effect is computed on a canvas in your browser at full resolution, so nothing is uploaded. For a plain monochrome, try Black & White; for a dotted comic look, Halftone.
A two-colour image where dark areas take one colour and light areas another, with a smooth gradient between — the striking style Spotify made famous. It unifies mixed photos into one palette.
No — the mapping is computed on a canvas in your browser at full resolution.
Most online converters upload your file to a server. InfyTool ships the actual encoders to your browser as WebAssembly instead, so processing happens inside your tab — faster for batches, and nothing to delete afterwards.
InfyTool is built by the same team as these free libraries.