Accelerate for Safari 4+

Control video playback

Ritam Sarmah

    • 4.1 • 118 Ratings
    • Free
    • Offers In-App Purchases


Accelerate is a fully customizable extension for controlling video playback and speed in Safari.

• Change the playback speed of any HTML5 video in Safari
• Personalize keyboard shortcuts for video controls, including play/pause, skipping, adjusting speed, muting sound, and toggling Picture in Picture
• Supports Picture-in-Picture and AirPlay
• Works with YouTube, Netflix, Hulu, Apple TV+, Prime Video, Twitch, and more

By default, you can use the following keys on your keyboard to control video speed:
D: Speed Up
S: Slow Down
R: Toggle Default Speed (1x)
A: Toggle 2x Speed
V: Show Current Speed
P: Enter Picture in Picture

You can customize these and create additional shortcuts for the other playback actions available in Accelerate.

Accelerate never collects any personal data or identifiable information from you. Safari will show a general warning that the extension can read sensitive info from all webpages. This permission level is required for extensions like Accelerate in order to interact with the web pages you visit. For more details, please see Accelerate's privacy policy.

If you have any questions, check out Accelerate's FAQ page or send an email to

What’s New

Version 4.1

• Add customizable minimum and maximum playback speed
• Add icons for better shortcut option visibility in Shortcuts tab
• Fix playback speed not being set for new videos on some websites, like YouTube
• Fix shortcuts that use plus (+) key on number pad
• Fix UI bugs on macOS 10.13 High Sierra

Thanks for all the feedback and support! If you have any issues or suggestions feel free to email me at

Ratings and Reviews

4.1 out of 5
118 Ratings

118 Ratings

Huntman24 ,

Great but have recommendation

I am really enjoying the functionality of the extension. I use this as a medical student to more quickly navigate through lectures.

One additional feature that would make this perfect for me would be menu commands to make universal keyboard shortcuts. An example this could be used is during recorded lectures and taking notes. If i miss a particular portion of the lecture audio and I need to skip backwards to get it, without exiting the note taking application, I would be able to do that. I cant tell you how much I am going in and out of applications when I just want to have a global shortcut for pause/play, skip forward and skip backward. Maybe Accelerate can do this and I just missed it. Great applicaiton none the less!

shamrocksread ,

Almost perfect

This extension is super great! I just have 2 small suggestions that I think would make it much better. One, I wish the video didn't pause for a split-second as you're changing the speeds and two, I wish there was a small, slightly transparent notification that you could put in the corner so you could see what speed the video is playing at without actually having to change the speed to see.

Developer Response ,

Hi shamrocksread, thanks so much for the feedback and kind review! There is actually a shortcut to show a notification with the speed you are on without having to change the speed (the default key is “V”, but you can change this in the preferences if you’d like). The split second pausing is unfortunately a known issue actually caused by Safari’s video processing that happens anytime a playback setting is changed.

galicky ,

Perfect for Speeding Through Videos/Audio

When I listen to podcasts, I always utilize the 1.5x-2x speed and wanted to figure out how to do that on my Macbook. I came across this app and it works perfectly!! I don't even have to open the app in order to accelerate a video because I have it as an extension in Safari. I simply press "D" to speed up the video and "S" to slow it down (this shortcut can also be edited). If you are like me and enjoy consuming content rapidly, this is the app for you!

App Privacy

The developer, Ritam Sarmah, 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

More By This Developer

You Might Also Like