How to Slow Down A Video Easily and Quickly: Step-by-Step Guide

December 17, 2021Ashley Mae

Slowing down a video is a popular technique to create amazing effects for your videos, especially for jumping, smiling, running in the grassland, etc. You can apply this effect to any video to show the scene in detail and make it more dramatic. Although almost all mobiles have a slow-motion camera mode to take low-speed videos, how to edit and slow down the videos at a normal speed? This article will introduce 3 efficient ways to help you slow down videos on Windows/Mac and your mobile Android/iPhone. Keep reading this article and learn the detailed steps.

Slow Down a Video

Part 1: The Ultimate Guide to Slow Down A Video on Windows/Mac

Aiseesoft Video Converter Ultimate is the best tool to slow down videos on Windows/Mac without losing too much quality. By adjusting the frame rate, you can keep the original frequency and quality of the video. Moreover, you can use this video speed controller to edit, clip, crop or change the format of the videos before exporting. For example, you can slow down MP4 with it easily.

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More Powerful Features - Best Software to Slow Down Videos

  • Speed up or slow down videos at the speed rate from 0.125X to 8X.
  • Supports more than 1000 video and audio formats to import and export.
  • Able to adjust the video format, resolution, quality, frame rate, etc.
  • Provide multiple editing tools to clip, add filters, add effects to the videos.
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Step 1:
Download and launch Aiseesoft Video Converter Ultimate on Windows/Mac. Click the Toolbox menu at the top and choose the Video Speed Controller tool. Then click the Plus icon in the popping-up window to add the desired videos.
Choose the video speed controller
Step 2:
You can choose from 9 kinds of speed rates to speed up or slow down videos. For creating slow-motion videos, you need to choose the 0.125X, 0.25X, 0.5X, or 0.75X speed rate. You can directly preview the effect on the screen and control the speed to the desired one. In this way, you can make wonderful slo-mo videos.
Video speed controller new
Step 3:
After that, click the Output menu and you can adjust the video format, quality, and frame rate. You'd better choose a high frame rate to keep the original smooth and quality. Click the OK button to save the settings. At last, click the Save To button to choose the desired storage path and click the Export button to start slowing down the videos.
Adjust the video quality settings

Part 2: How to Slow Down A Video on Android/iPhone Easily

As mentioned before, iPhone and Android phones support taking slo-mo videos now. But do you know how to slow down a normal-speed video on Android/iPhone? Following the next 2 ways with detailed steps.

1. How to slow down a video on iPhone through iMovie

iMovie is the default video editor for iPhone/iPad, and it also supports speeding up or slowing down videos. Please read the steps:

Step 1:
Open the iMovie app on your iPhone and tap the Plus icon on the main interface to create a new project. A window will pop up, and you can tap the Movie button to choose the desired videos. Then tap the Create Movie button to start editing and slowing down the videos.
Create a new project to speed up
Step 2:
Then you can preview the video. Below the video, you can cut videos, change the speed, adjust the volume, add filters, etc. To slow down a video on iPhone, you need to tap on the Clock icon and pull the slider to the left. You can preview the effect and choose the desired speed rate.
Slow down a video on iPhone
Step 3:
After slowing down the video, click the Done button at the top-right corner to save the video. Then you can choose to download or share the video on the media platform.
Save the edited videos iMovie

2. Detailed steps to slow down a video on Android

Android phones don't provide default video editors, so you should rely on third-party video speed controllers. Video Speed is designed for speeding up and slowing down videos on Android. It also provides basic editing functions. Here are the detailed steps:

Step 1:
Download the Video Speed app on Google Play and launch it on your Android phone. On the main interface, click the Select Videos button to add the desired video. You can also click the Camera button to take a video and slow down it right now.
Step 2:
Then you can pull the speed value to the left to slow down the video to the desired speed. You can also use this app to do the simple trimming. After that, click the Next icon at the top-right corner to save the video.
Video speed to slow down videos android

Part 3: FAQs of How to Slow Down A Video

1. Will slowing down videos affect the video quality?

Yes. If you slow down a video, the frame rate will be reduced according to the speed rate. To make up for the drop frame, you'd better set a high frame rate to keep the smooth playback.

2. How to slow down a video on iPhone with slo-mo mode?

Open the Camera app on your iPhone, and then swipe right to find the slo-mo mode. Choose this mode and take videos. Then you will slow down the video, and it will be automatically saved on the photos.

3. Can I slow down a video when playing it?

Of course, you can. You can directly control the playback speed on Windows through Windows Media Player. Or you can download professional video players with a speed controller to slow down a video on any devices.


Above are 3 easy methods to slow down a video on Windows/Mac/Android/iPhone. For Windows and Mac users, free download Aiseesoft Video Converter Ultimate now and control the video speed easily without losing too much quality. Speeding up MP4 is also easy to achieve. To slow down videos on iPhone, you can use iMovie or other professional video editors like Android. If you get what you want in this article, you can share it with your friends now!

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Video Converter Ultimate is excellent video converter, editor and enhancer to convert, enhance and edit videos and music in 1000 formats and more.

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