100% PRIVACY! SubShifter works locally, on device. No server. Your data is safe.

SubShifter is meant to be an incredibly simple app.
Shift or Sync your subtitles files in seconds, that's it. Don't be bored by the useless complexity of other apps.

• Support SRT files (more to come, free updates)
• Instant Shift of your subtitles
• Instant Sync of your subtitles: fix subtitles whose shift increases/decreases progressively during the movie (drifting subtitles, with optional extrapolation to the whole file)

• Compatible with Dark Mode
• Compatible with the TouchBar

• No data collection: everything happens locally on your device. Privacy is important.


Note: The free version allows you to save up to 30 minutes of synced/shifted subtitles. It is possible to have an unlimited access with the premium version of SubShifter. Premium version can be obtained in app either via a lifetime licence, a monthly subscription, or a yearly subscription. This also supports my work and all the free updates with new features to come.
The terms of use & privacy policy can be found here:

What’s New

Version 2.3

Hello, this new version ensures a perfect compatibility with the brand new macOS 12 Monterey.

Ratings and Reviews

4.4 out of 5
57 Ratings

57 Ratings

midifool99 ,

Worked for me.

Worked on the first try. OS 10.13.5. Haven’t tested it enough to rate 5 stars.

Developer Response ,

Thank you for the review! I hope you enjoy SubShifter :-)

OliverTwist78 ,

Finally a real 64-bit alternative to SubFix app

I use the SubFix app for years and love its simplicity. Unfortunately, the developer seemed to have disappeared and hadn’t updated SubFix to 64-bit version as required for running in Mojave/Catalina environment. I tried many different alternatives, and many of them were so bad, complicated, or useless. I considered buying an older secondhand MacBook with High Sierra just for the SubFix app.

I came across this SubShifter app and gave it a try. I am so happy that SubShifter is so similar to SubFix and more! I am able to sync the subtitles at two points without fuss. Thanks so much for this app! I will let my deaf and hearing friends know about this great 64-bit alternative to SubFix.

The only feature improvement would be the ability to manually type in the line number, especially at the end of film, prior to syncing. That would save the hassle of scrolling all the way down to the last dialogue. Thanks!

Developer Response ,

Thank you for this wonderful review. This is so great to read how SubShifter helps you.
I'll provide an update with your suggestion very soon. Stay tuned!
Best regards, Jonathan

Jake Fantom ,

Extremely limited

Different conditions create subtitle sync issues. This app deals with one of them — if your subtitles are UNIFORMLY out of sync. One of the major causes of sync issues is frame rate differences between video and subtitle files. This app cannot correct those issues since the adjustment required is not as simple as just shifting everything backward or forward. So when the app's author refers to the "useless complexity of other apps," what he means is if you have a very simple issue, his app might be able to solve it. If you have a more complex issue, trust me, you will need one of those "other apps" with more robust features.

Developer Response ,

Hello, I just released SubShifter 2.0 that can now fix subtitles that are drifting through time (= shift increases during the movie because of a different frame rate for example). I hope that will satisfy you. Please let me know! If this helped, please consider editing your rating? Thanks.

App Privacy

The developer, iSolid apps, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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