SubShifter: Sync subtitles 4+

Shift video movie subs SRT

iSolid apps

    • 4.5 • 100 Ratings
    • Free
    • Offers In-App Purchases



Adjust your subtitles locally & safely on your device. No server is being used. Your data is safe. There is no data collection.

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

• ZERO 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 2.5

• The confirmation popup can now be disabled in the app preferences

Ratings and Reviews

4.5 out of 5
100 Ratings

100 Ratings

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

MichaelYerushalmi ,

A valuable tool: Does exactly what it says on the tin

This app shifts or syncs subtitle files, and that's exactly what I've been needing. The syncing option is especially great, since it corrects the drift that can occur when you simply shift the subs by a specific number of seconds.

You get out of it what you put into it. It's not going to play the video for you. You need to use your own favorite video player to determine the amount of drift or sync needed – and then SubShifter does the job.

My wife doesn't speak English fluently and needs subs in her language, which is a minority language and doesn't have a full range of options.

After trying this app a few times I bought a lifetime premium subscription. I realised that given the price options, it would be silly for me to buy it for just a month or a year. Plus, the developer is responsive. Support quality MacOS app development!

Developer Response ,

Thank you for this fantastic feedback! Much appreciated! 🙏🏻 Jonathan

mintyfresh15 ,

Works great!

This is exactly the app I needed! It doesn't do anything besides shift timecodes but it is so much easier to use for that purpose than more complex subtitle apps. You just put in the correct timecodes of two different lines and it corrects all of them for you, no need for you to figure out how many milliseconds it needs to be shifted by.

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

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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