Authentic cross-processed colour
Developing slide film in the wrong chemistry produces wild, unpredictable colour shifts. This reproduces that look with per-channel curve remapping.
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Cross Process Image Effect
Recreate cross-processed film with clashing channel curves and punchy colour shifts.
- Upload
- Single file · 25 MB max
- Privacy
- Nothing is uploaded
- Cost
- Free · no sign-up · no watermark
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Processed entirely on your device
Your file is read, transformed and re-encoded inside this browser tab using JavaScript. There is no upload endpoint — nothing leaves your machine, nothing is stored, and the result is created as a local object URL that disappears when you close the page.
Overview
About the Cross Process Image Effect
Create a cross-processing effect free online — apply mismatched film channel curves for the punchy greens, yellows and magentas of cross-processed slide film. In your browser.
Developing film in the wrong chemistry
Cross-processing is a happy accident of the darkroom: run slide film through negative chemistry (or vice versa) and the dyes develop unevenly. The result is a high-contrast image with clashing, hyper-saturated colours that no normal print would produce.
How this tool recreates it
We apply a different tone curve to each colour channel — crushing reds, lifting greens and inverting the blue midtones — then blend the result by an intensity slider. The mismatch between channels is what generates the signature green-yellow-magenta casts.
On-device and adjustable
The channel curves run per pixel on an in-browser canvas with a strength slider, and the result is exported as a lossless PNG at full resolution, so your photo never leaves your device.
Step by step
How to use the Cross Process Image Effect
Drop a photo onto the upload area — daylight shots shift most dramatically.
Raise the intensity slider to push the clashing channel curves further.
Skin tones and skies take on the signature cross-processed cast.
Download the cross-processed PNG at full original resolution.
Why use it
Benefits and common use cases
What this tool is good for, and what it deliberately does not try to do.
Punchy, editorial vibe
The exaggerated greens, yellows and magentas give photos a bold, stylised edge popular in fashion and music imagery.
Local and adjustable
The channel curves run per pixel on an in-browser canvas with a strength slider, and the result exports as a lossless PNG.
Questions
Frequently asked questions
Short, honest answers about quality, limits and privacy.
What is cross-processing?
Cross-processing means developing photographic film in chemicals meant for a different type — usually slide film in C-41 negative chemistry. The mismatch produces strong, unpredictable colour shifts and contrast.
Why do the colours look wrong on purpose?
Each colour channel responds differently to the wrong chemistry, so greens, yellows and magentas get exaggerated. That clashing, oversaturated cast is exactly the sought-after effect.
Is my photo uploaded?
No. Every pixel is processed on an in-browser canvas and the result stays on your device; nothing is sent to a server.