Speedifier is a native Safari 10 extension that lets you control the playback speed of every HTML5 video in Safari. So you can watch your favourite videos in double speed or half the speed.
If you have an HTML5 video playing on any website just press right and select the Speedifier option you want to slow down or speed up the playback speed of the video.
On some popular pages Speedifier even adds a dedicated button to the video player to control the playback speed
Speedifier adds a button to those pages:
* Prime Video
NOTE: If a video requires an external plugin like Silverlight or Flash it is not supported by Speedifier
- Bug fixes
Ratings and Reviews
Read the fine print. The icon has “2x,” so I expected that this software would double the speed of any video. But it only increases the speed of HTML5 videos by 1.25. That’s negligible and useless.
Revised Review (used to love this, but it stopped working)
This app has now stopped working for, I’m guessing, High Sierra. Emailed the developer a while back. No response. I did truly love this app and will change my review if the app starts working again.
My earlier review:
I bought this really to support Pipifier, another incredibly useful addon for Safari. However, this app is even more life-saving for me. I watch a lot of documentaries on Netflix and to be able to go through them (especially the slow ones) at 2x the speed is fantastic.
Works flawlessly and a seriously great way to support PiPifier. Nice work.
DID NOT WORK
After reading previous reviews, it seems to be a common consensus that this app does not show up in the extensions tab and therefore useless and a waste of $2. NEVER had this issue with a product before and got no feedback from customer support.
With Family Sharing set up, up to six family members can use this app.