developed by negaflow · Chroma Engine
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negaflow

From film to finished photograph

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macOS 14.0 or Windows 11 24H2 and later · Apache-2.0

negaflow Develop workspace

Chroma Engine

Film development

Invert scanned negatives and adjust exposure and color. Color and black-and-white negatives, slides, and a choice of development targets are supported.

The default development target is MAIN. Run automatic tone and color adjustments when you need them.

negaflow Develop workspace

GrainMend RGB

Dust and scratch repair

GrainMend RGB works without an infrared channel. Find defects automatically, mark an area, or repair them with a brush.

Adjust the strength of each repair layer, or disable and delete layers individually.

negaflow GrainMend tools

Print and export

Set the paper and margins for a single photograph or a whole-roll contact sheet.

Save your output as JPEG or 16-bit TIFF.

The negaflow print workspace with 34 photographs arranged on one sheet
01 / 06
Sunlight on the shore
Umbrellas on a rainy street
Trees and grass in a park
Clouds over open grassland
A black-and-white photograph of rocks and sea
A wooded lakeshore and a red torii

Celebrating this summer, the bicentennial of Niépce's first-ever photograph.

Download negaflow

Installers for macOS and Windows. Free to use, with no account or subscription.

First launch

The current releases are not signed with a paid developer certificate, and the macOS app is not notarized. Check that the file came from GitHub Releases.

If macOS says the developer cannot be verified, open System Settings → Privacy & Security and choose Open Anyway. Apple’s guide explains the different warning types.

In Windows SmartScreen, you can choose More info → Run anyway. Organization policies or other restrictions may make this option unavailable.

Connecting a film scanner needs the separate scanner plugin.

GitHub Releases Help