Thephoto

Convert RGB to CMYK and upscale low-res photos — free, no signup

by Brett Jones

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Sep 27, 2026 Design Tools

cmyk conversion free software image processing photo upscaling rgb to cmyk

About

A free RGB↔CMYK converter and photo upscaler I built after getting tired of opening Photoshop for one-off print conversions. Handles CMYK color separation with a real embedded ICC profile, plus 2x–8x photo upscaling with a sharpening pass. Supports JPG/JPEG/PNG/PDF, no signup. Still actively building — next up is a QR code generator on a subdomain. Open to feedback, especially from anyone doing print work regularly.

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