How to Speed Up or Slow Down a Video on Windows and Mac

Let’s break down how to speed up or slow down videos from the 4 methods mentioned below, for you to easily change video playback speed on Windows, Mac, and iPhone for free.

Wednesday January 19, 2022 3:19 PM PDT by Karen Greene

If you want to speed up/slow down a clip of your video to mark a transition or slow down a clip to focus on it, then that’s what you’re going to learn today. There are a variety of cases where we need to change the speed of our video to better present the scenes and our ideas to our audience. And speeding up or slowing down videos are great video editing skills that show your viewers more content in a limited time, so it has been massively used by YouTubers. Speed up videos for making gorgeous time-lapse videos and substantial compilation videos, or slow down videos for showing people’s slow movements in slow-motion videos, for instance.

This post covers 4 viable solutions to speeding up or slowing down videos on Windows 10 and Windows 11 PC, Mac, and iPhone. Please read on to learn more.

How to Speed Up or Slow Down Videos (Step by Step)

Now let’s reveal the detailed steps to adjust the speed of the video one by one.

Step 1. Choose a Video Speed Editor – FilmForth

FilmForth is a free video speed editor that’s simple to use. It can be installed with 2 clicks, and, contrary to most free editors, FilmForth is watermark-free, so you won’t have any annoying watermarks when watching your final video.

To start downloading FilmForth, click on the button below.

Step 2. Import Your Video Clip

Tap the New Project button in the middle to import the video you are going to change the playback speed of.

Create a new project

Create a new project

Once you’ve created the project, you’ll need to add the video file by clicking on the ADD VIDEO/PHOTO CLIPS icon. You can also drag and drop your video clip to FilmForth.

Add Video or Photos to FilmForth

Add Video or Photos to FilmForth

Step 3. Speed Up or Slow Down the Video

Once the video was uploaded, you will see the toolbar showing at the button. You can simply click on the Speed button to change the playback speed.

Hit the Speed Button to Change the Video Speed

Hit the Speed Button to Change the Video Speed

As you can see, there you can adjust the playback speed of your video to either slow it down or speed it up. Once you’ve adjusted the video speed, simply click and move the on circle button that’s located on the bottom left to adjust the speed.

Adjust the Video Speed Now

Adjust the Video Speed Now

Step 4. Save & Export Video

To finish things off, you’ll need to save your project as a video file, so you can share and upload it. To do so, click on the Save Video button that’s located on the right corner of FilmForth.

Save and Share the Video

Save and Share the Video

There will pop up a window that contains video resolution, quality, and frame rate. You can also choose to export the video with or without a watermark. Then select the Save button to start exporting.

Tap Save to Export the Video

Tap Save to Export the Video

Take into account that it might take a while for it to export, as the speed of the exporting process depends on the duration of your video.

For most users, to slow down a video would just be the same as to speed up a video with the same video speed editor. No matter you are using a Mac or a Windows PC, to speed up or slow down a video would have the same working flow. Just adjusting the speed timeline will make it. Except for FilmForth, there are lots of great speed changer editors around.

In the following part, let’s meet 2 more free video speed editors.

Using iMovie to Speed up or Slow Down a Video on MacOS

iMovie is quite known for Mac users. As a powerful video editing software from Apple, iMovie has lots of highlights features. Like simple interface with some great themes can shin the movie-making ideas. Lots of wonderful movie templates and audio tools support users to explore more possibilities while editing videos.

But also, iMovie owns lots of cons like not supporting tagging and no motion tracking. As iMovie supports only MacOS, it limited lots of video creators. For Windows users, FilmForth would be one of the best iMovie equivalents to creating a video project.

Using iMovie to Edit Video

Using iMovie to Edit Video

How to Speed Up or Slow Down a Video on iPhone

After we talked about how to speed up or slow down a video on Windows and Mac, here comes the solutions to changing video playback speed on iPhones. To do so, we need iMovie app which is already installed on your iOS devices. iMovie is a free video editing app for Mac and iPhone and it allows you to do a lot of video editing including adding text to videos. You can simply tag on the icon to launch iMovie app and get started.

  1. Launch iMovie app and hit Create a Project.
  2. Select the Movie option, that option allows you to import video clips into iMovie from your camera roll, and then tap the Create Movie button.
  3. Tap to select the added video in the timeline, and then select the speed icon.
  4. Drag the speed bar to adjust the video playback speed. Video playback speed by default 1x speed, drag the handlebar to the left to speed up the video on your iPhone, and you can always preview it from upper the screen.
  5. When you’re satisfied with the playback speed of your video, hit the Done button from the upper-left corner to save and export the video.

For detailed steps, you can check our step-by-step guide on how to speed up a video on iPhone.

Speed Up Video on iPhone

Speed Up Video on iPhone

Adjust the Video Speed with Photos App on Windows 10

Photos editor for Windows PC is just the same as Windows Movie Maker for Windows users. Photos app owns lots of great star features to make a stunning video. This built-in app can browse all your photos once you launch it. That will enable users to see their pics or select pictures easily. No matter the users want to edit photos or videos, The Photos app supports them very well.

But for the Photos app, you can only support simple picture and video editing. More professional editing needs will ask for more professional video/photo editing software. As the best Windows Movie Maker alternative, FilmForth works for all-level video creators. It’s worth a try.

Video Editor on Windows PC - Photos

Video Editor on Windows PC – Photos


As you’ve seen, whether you want to change the playback speed of a certain part, or of the whole video, the process is really easy and doesn’t require any previous video editing knowledge.

In fact, I decided to write this article as most tutorials to change playback speed I’ve seen either used old tools (like Windows Movie Maker), or used video players like Media Player, which aren’t ideal tools for this job and will make the speed changing process more difficult than it should be.

Did you like this tutorial? Please leave a comment and let me know what you think! And if you want more tips on how to use FilmForth to edit videos you can also visit our other articles.


Karen is a professional writer with a background in column writing who enjoys resolving complex topics and explaining them in interesting ways.

filmforth icon

FilmForth - Free Video Editor

  • Easy to use and no skill required at all.
  • Export video to MP3 with one click.
  • Add transitions, effects, filter, text to the video as you want.
  • Remove, replace, record and edit the background audio easily.
  • Change the speed, volume, and subtitle on video with ease.
  • Stabilize, trim, rotate, and convert video in seconds.