How to convert color film negatives on iPhone
Last updated 2 June 2026
To turn a color film negative into a normal photo, you have to invert it and remove the orange base, the job a lab's C-41 process does. On iPhone you can do the same thing on-device: EditMe runs a C-41 inversion pipeline that normalizes each color channel and neutralizes the orange mask, with profiles tuned for common stocks.
Why color negatives are hard
Color negative film carries an orange mask, a built-in correction layer that makes a raw scan look muddy and orange if you just invert it. Getting a clean positive means inverting each color channel and cancelling that mask, which is exactly what a lab does chemically and a good app does mathematically.
How EditMe does it on the device
EditMe measures the darkest and brightest density in each channel, inverts in a linear working space, and removes residual mask crosstalk, then optionally balances the highlights. It ships profiles tuned for stocks like Portra 400 and 800, Cinestill 800T, Gold 200, Ultramax 400, and Ektar 100, plus a conservative generic fallback. It all runs on the device, so your scans never leave your iPhone, and every save keeps the original.
How it compares
| Consideration | EditMe | Cloud editor |
|---|---|---|
| Removes the orange mask | Yes | Varies |
| Per-stock profiles | Yes | Rare |
| Photos leave your device | Never | Usually uploaded |
| Works offline | Yes | Often no |
| Price | Free to download | Often subscription |
Frequently asked questions
Can I convert color negatives on an iPhone?
Yes. With an app that has an on-device C-41 inversion pipeline, such as EditMe, you can turn a photo of a color negative into a finished positive directly on your iPhone.
What is the orange mask?
Color negative film has a built-in orange correction layer. A simple invert leaves the image looking orange and flat; a proper C-41 process cancels that mask so colors come out right.
Does EditMe support specific film stocks?
Yes. It includes profiles tuned for stocks like Portra 400 and 800, Cinestill 800T, Gold 200, Ultramax 400, and Ektar 100, plus a generic fallback for unknown film.
Is it free and private?
EditMe is free to download and the inversion is part of the free core. It runs entirely on the device with no cloud and no account, so your scans never leave your iPhone.