The short answer. If you already pay for Capture One, stay with it: its own negative conversion arrived in March 2026, and adding a second application to a working pipeline costs more than it saves. Come here if the subscription is what you want to end, or if you want the conversion itself to be steerable rather than good by default.
Capture One shipped negative conversion in version 16.7.4, March 2026: a Convert Negative button, a dedicated Film Negative workspace, and tethered scanning support. That changed the question for its users: Negative Lab Pro has never existed for Capture One, so until then the choice was to leave the application or convert somewhere else.
What is on the other side. It is Open Negative Initiative, a free macOS application for converting and editing scanned film: colour negatives, positives and black & white, from a camera scan or a scanner. It runs on its own, with no host application to buy. Trying it does not mean leaving Capture One: it exports a 16-bit TIFF in the colour space you want, which lands there as a positive with your grade already on it: the old Lightroom-plus-plugin shape, minus the plugin and minus the licence. macOS 13 or later. Apple Silicon and Intel.
Free, macOS 13 or later. It is an alpha, and that costs you little: your originals are never modified, and every earlier version stays downloadable.
If you already pay for Capture One, stay
You have a mature raw editor, tethering, layers and a colour engine with a long reputation, and now it converts negatives too, alongside a catalogue that holds every photo you shoot, not just film. This app organises film on its own now, in Archive and Projects, but it stays about film: rarely worth a second application and a second library for the one stage Capture One already covers.
On Windows the question does not arise at all: this one runs on macOS and nowhere else, so the serious free option there is darktable's negadoctor, which runs on Windows and Linux too.
When it is worth converting outside Capture One
- The subscription is why you are reading this. Capture One is paid, perpetual or by subscription; this one is free, with nothing held back for a paid tier.
- You want to steer the conversion, not be handed a good default. A general raw editor converts negatives as one feature among hundreds. Here it is the whole application, so the controls are the negative's own: levels graduated in real densities, a density ceiling, per-channel gains at ±3 stops.
- Your automatic result is nearly right on some films and wrong on others. That is the signature of a single automatic making a single assumption, and it is why there are six here, each of which wins the films the others lose.
Capture One vs Open Negative Initiative
| Open Negative Initiative | Capture One | |
|---|---|---|
| Cost | Free, GPL-3.0 | Subscription or perpetual licence |
| Scope | Film conversion and organisation | Full raw editor and catalogue |
| Platform | macOS 13+ | macOS, Windows |
| Automatic conversion | Six modes, on click, undoable | Convert Negative |
| Tethered scanning | No | Yes |
| Catalogue | Archive and Projects, film only | Catalogue or sessions, any photo |
| Batch export | A selection in one pass, naming pattern, progress count | Export recipes |
| Metadata written on export | The capture date, and nothing else | IPTC and copyright fields |
| Local adjustments | None. Every control acts on the whole frame | Layers and masks |
| Source | Ships with each version | Closed |
Capture One negative conversion shipped in 16.7.4, March 2026, from its release notes, consulted 15 August 2026. Its catalogue, layer and export features are the ones its own documentation describes; the rows above name what this application does or does not have beside them.
The test that settles it
One difficult roll, converted both ways. If the built-in conversion gets you where you want, you have your answer and you have lost ten minutes; if it does not, you know the one stage to move. macOS 13 or later. Apple Silicon and Intel. Free, no account, and nothing is applied to a photograph until you ask for it. The table of all six tools is there if you would rather see the whole field first.
Free, no account, no trial limit.