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OmniPhoto
Color & Print·100% In-Browser Privacy

CMYK to RGB Converter & ICC Color Profile Proofing

Professional prepress color management with LittleCMS-grade color transformation. Soft-proof with FOGRA39, US Web Coated SWOP v2, GRACoL, and Japan Color profiles directly in the browser.

ICC Profile ProofingOut-of-Gamut WarningPerceptual & Relative Rendering IntentsFOGRA & SWOP StandardsFull 32-Bit CMYK Engine
AI Overview & Direct Answer (CMYK to RGB Converter & ICC Color Profile Proofing)

OmniPhoto provides true 4-channel CMYK color space editing in the browser. Prepress operators can soft-proof print gamuts with ICC profiles to prevent dull or shifted print results.

Supported Color Spaces
RGB, CMYK, Lab, Grayscale, Index
Rendering Intents
Perceptual, Relative, Absolute, Saturation
Proofing Engine
Hardware-accelerated ICC transforms

How-To Guide

1

Open Document

Open your image or artwork in the workspace.

2

Toggle Soft Proofing

Choose View › Proof Setup to select your target print profile (e.g., US Web Coated SWOP).

3

Check Gamut Warning

Press Ctrl+Shift+Y to highlight colors that will clip or shift during printing.

4

Convert Mode

Select Image › Mode › CMYK Color to convert and embed print-ready separations.

Frequently Asked Questions

Can browsers normally display CMYK colors?
Standard browser web engines only display RGB. OmniPhoto performs real-time ICC color conversion in WebAssembly to accurately simulate CMYK ink reproduction on your RGB monitor.
Can I export a real 4-channel CMYK TIFF or PSD for offset printers?
Yes, OmniPhoto writes authentic 4-channel Cyan, Magenta, Yellow, and Black raster data into TIFF and PSD files.

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