NegPy - free negative conversion app
p.1 #1NegPy - free negative conversion app
I'm a bit surprised there isn't more talk about this one. It's an open-source app for processing scans (built on Python, hence the name).
Here's the github project: https://github.com/marcinz606/NegPy
And the releases page with .exe and .dmg files for Windows & Mac: https://github.com/marcinz606/NegPy/releases
(pretty active development so worth checking for new versions every couple of months)
It certainly has a steep learning curve. I'd say steeper than NLP and SmartConvert. But it's also more powerful - you can mask certain areas and dodge & burn, you can select a film stock profile and then adjust the amount of cross-talk, super-detailed settings for shadow / highlight density as well as WB adjustments, etc..
I still like SmartConvert for its simple workflow, esp. with Black & White film. But I'm seriously considering switching to NegPy for color.
Here's the github project: https://github.com/marcinz606/NegPy
And the releases page with .exe and .dmg files for Windows & Mac: https://github.com/marcinz606/NegPy/releases
(pretty active development so worth checking for new versions every couple of months)
It certainly has a steep learning curve. I'd say steeper than NLP and SmartConvert. But it's also more powerful - you can mask certain areas and dodge & burn, you can select a film stock profile and then adjust the amount of cross-talk, super-detailed settings for shadow / highlight density as well as WB adjustments, etc..
I still like SmartConvert for its simple workflow, esp. with Black & White film. But I'm seriously considering switching to NegPy for color.
Aug 09, 2026 at 04:57 AM
p.1 #2NegPy - free negative conversion app
I find it really good and can assess inverting a negative pretty accurately. Minor tweaks might be needed frame to frame but thats all
Sep 21, 2026 at 04:31 PM
p.1 #3NegPy - free negative conversion app
I tried to use the AppImage on my Linux system. It issues the error message "Incompatible processor. This QT build requires... (core dumped)." Which is to say it won't run on my AMD processor.
Sep 24, 2026 at 04:51 AM
p.1 #4NegPy - free negative conversion app
Has anyone played with the Nikon Coolscan integration? Couldn't quite figure out what I needed to do to get it setup but from what I understand they pretty much took the nikon scan original software and backported it
Sep 24, 2026 at 06:17 AM
p.1 #5NegPy - free negative conversion app
I tried it and left it. I forgot why. I did try Filmvert, which is also open source and I kept that one.
Sep 24, 2026 at 09:58 AM
p.1 #6NegPy - free negative conversion app
I’ve been using NegPy for a couple months now. The quality of the conversion and the workflow are excellent in my opinion. Since it has pretty much every tool I need for negative conversion, I don’t even feel the need to “finish” my edits in another application.
Sep 24, 2026 at 04:32 PM
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p.1 #7NegPy - free negative conversion app
Just played around with this without looking at any documentation. It does an amazing job with conversion. There were a handful of times I tripped it up but overall, I had to do very little, if anything to get a really good result. I hope more people find this as it's a really nice tool.
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Oct 02, 2026 at 10:18 PM
p.1 #8NegPy - free negative conversion app
Harold Carlson wrote:
Just played around with this without looking at any documentation. It does an amazing job with conversion. There were a handful of times I tripped it up but overall, I had to do very little, if anything to get a really good result. I hope more people find this as it's a really nice tool.
Nice results!
Just played around with this without looking at any documentation. It does an amazing job with conversion. There were a handful of times I tripped it up but overall, I had to do very little, if anything to get a really good result. I hope more people find this as it's a really nice tool.
Nice results!
Oct 03, 2026 at 07:20 AM
p.1 #9NegPy - free negative conversion app
I just tested v0.67.0 and damn the new user interface is nice and the app is much more snappy on my Macbook Pro compared to earlier versions!
Also many awesome features like the metadata tab, where you can easily add the film gear a roll was shot on, the date of capture, etc.
Also many awesome features like the metadata tab, where you can easily add the film gear a roll was shot on, the date of capture, etc.
Nov 02, 2026 at 02:09 PM
p.1 #10NegPy - free negative conversion app
I love the wealth of controls, you can get a lot more in the weeds with tweaking things, but overall out of the box I've much preferred the colors I get out of Negative Lab Pro. It's great to have a free open source option though and I'll keep following it for sure.
Nov 06, 2026 at 12:03 PM
p.1 #11NegPy - free negative conversion app
Thanks for posting. Not sure if this is Claude-aided project, but there have been several such good projects. I'm liking what I am seeing, especially a) the added features and b) the potential to decouple from other software.
Nov 06, 2026 at 12:58 PM