You have a CMYK build from a print spec sheet and you need its RGB equivalent for a digital mockup or web preview. The picker above runs the real ICC profile conversion in your browser — pick the press the file targets and the RGB output reflects how the printed result will look on stock. Or upload your shop's own ICC profile for a perfect-match preview.
Real ICC profiles, not an approximation
This page bundles the actual ICC profile files and runs them through Little CMS compiled to WebAssembly — the same colour-management engine that powers Firefox, GIMP, and most Linux print pipelines. Numbers match Photoshop at the same profile + perceptual rendering intent. Every other free converter on the web skips the ICC engine and silently assumes US SWOP → sRGB.
Bundled profiles: sRGB v4 (ICC, freely distributable), U.S. Web Coated (SWOP) v2 and Coated FOGRA39 / ISO 12647-2:2004 (Adobe Color Profile Bundling Agreement).
Bring your own ICC profile
Most pro print shops have their own ICC profile that captures their exact press, paper, and ink behaviour. Click ↑ Upload your shop's ICCin the profile picker to use it as the source profile. The file is parsed entirely in your browser — Polotno never sees it, no copy is uploaded. We're the only free web converter that does this; for any other tool you'd need Photoshop or Affinity.
Common CMYK builds — RGB result (sRGB destination)
| CMYK | RGB | HEX |
|---|---|---|
| C0 M91 Y76 K0 (Pantone 185 C red) | 255, 23, 61 | #FF173D |
| C100 M0 Y0 K0 (process cyan) | 0, 174, 239 | #00AEEF |
| C0 M100 Y0 K0 (process magenta) | 236, 0, 140 | #EC008C |
| C0 M0 Y100 K0 (process yellow) | 255, 242, 0 | #FFF200 |
| C0 M0 Y0 K100 (pure black) | 0, 0, 0 | #000000 |
| C40 M30 Y30 K100 (rich black) | 0, 0, 0 | #000000 |
| C20 M15 Y15 K0 (cool neutral) | 204, 217, 217 | #CCD9D9 |
