The simplest way to slow down video depends on what you're using

Most video players built into Windows, macOS, and phones have a speed control buried in the settings — usually a menu marked with three dots or lines. You can slow playback to 0.5x or 0.75x speed without any software installation. If you want to actually change the video file itself (so it plays slowly for anyone who opens it), you need video editing software. The tool you pick depends on whether you're working on a computer or phone, and whether you want basic slowdown or frame-by-frame control.

The difference matters: playback speed control is instant and does not change your file, but it only works while you're watching. Editing software takes longer but creates a new video file that stays slow no matter who opens it or what player they use.

Key Takeaways

  • Built-in video players on Windows, macOS, iOS, and Android all have playback speed controls that let you watch slower without changing the file.
  • To permanently slow a video file, you need editing software like DaVinci Resolve (free, Windows and Mac), iMovie (free on Mac), or CapCut (free on phone).
  • Slowing video by half or more can make the file size larger and may introduce stuttering if your computer is slow.
  • Frame-by-frame slowdown for sports or action requires software that can interpolate frames, which takes longer to process.

Slowing playback in your video player without editing

If you just need to watch a video slowly — to follow along with a tutorial, catch dialogue, or study movement — use your player's speed control. On Windows, right-click the video in Windows Media Player and look for "Playback speed" or click the settings gear icon. On Mac, open the video in QuickTime Player, then go to View menu and select "Show Playback Controls," then click the speed icon (looks like a speedometer). On iPhone, open the video in the Photos app or Apple TV app, tap the screen, and look for the speed icon in the bottom right. On Android, open the video in Google Play Movies or your default video app, tap the screen, and find the speed menu — usually marked with a number like "1x".

This method does not change the actual video file. When you close the player, the video stays at normal speed. This is the fastest option if you only need to watch something slowly once or twice. Most players let you choose from preset speeds like 0.5x, 0.75x, 1x, 1.25x, and 1.5x, though some allow custom speeds if you tap or right-click the speed control again.

Using free editing software on Windows or Mac

DaVinci Resolve is the most powerful free option for both Windows and Mac. Download it from Blackmagic Design's website (the free version is called DaVinci Resolve Community Edition). Open the program, create a new project, then import your video by dragging it into the media library. Drag the video onto the timeline at the bottom. Right-click the video clip on the timeline, select "Change Clip Speed," and enter a percentage — 50% makes it half speed, 25% makes it quarter speed. Export the finished video by going to File > Export and choosing your format.

iMovie (Mac only) comes free with macOS. Open iMovie, create a new project, drag your video into the timeline, then double-click the clip. A panel opens on the right — look for the speed icon (looks like a rabbit or speedometer) and drag the slider left to slow down. This is simpler than DaVinci Resolve but offers fewer options for fine control. You can export directly from iMovie by clicking File > Share and choosing your destination.

Windows Photos app has basic editing built in. Open your video in Photos, click "Edit & Create" at the top, then "Edit with filters." Click the three dots menu and look for "Speed" — you can slow it down and save a new copy. This is the fastest method on Windows if you only need basic slowdown, though it offers less control than DaVinci Resolve.

Slowing video on your phone

CapCut (free on iOS and Android) is the easiest phone option. Open the app, tap "New project," select your video, and tap "Add." Tap the video on the timeline, then tap "Speed" at the bottom. Drag the slider left to slow down — you can go as low as 0.1x speed. When you're done, tap "Export" and choose your resolution. The app will process the video and save it to your phone's camera roll.

iMovie on iPhone works similarly. Create a new project, add your video, tap the clip, then tap the speed icon and adjust. This is built in, so no download needed, but CapCut gives you more control over how slow you can go and works on both iPhone and Android.

Google Photos on Android has a trim and speed tool. Open your video, tap "Edit," then look for the speed slider. You can slow it down and save the edited version back to your library. Processing time on phones varies — a two-minute video might take 30 seconds to a few minutes depending on your phone's processor and how slow you make it.

What happens to file size and quality when you slow video down

Slowing a video to half speed doubles the length of the file in time, which usually means the file size gets larger on disk. A 100 MB video slowed to 0.5x speed might become 150–200 MB depending on the software and format you choose. The video quality itself does not degrade — you are not losing pixels — but if you slow it down very far (below 0.25x), you may see stuttering or jumpiness because the software is stretching frames across more time.

If you need very smooth slow motion for sports or action footage, some software can interpolate frames — meaning it creates new frames between the original ones to fill the gaps. DaVinci Resolve can do this, but it takes much longer to process. For most everyday slowdown, basic frame stretching is fine and processes quickly. Frame interpolation can take two to three times longer than regular slowdown, so only use it if the stuttering bothers you.

Choosing between playback speed and editing

Use playback speed control if you are watching a tutorial, learning a language, or studying something once. Use editing software if you want to share the slowed video with someone else, post it online, or keep a permanent slow-motion version. Editing takes longer (anywhere from a few seconds to several minutes depending on video length and your computer speed) but gives you a file you can use anywhere.

If you are working with very long videos (over an hour), editing on a phone will be slow and may run out of storage. Use a computer instead. If your computer is older or has limited RAM, DaVinci Resolve may stall — in that case, use iMovie or the Windows Photos app, which are lighter weight and process faster on older hardware.

Frequently Asked Questions

Can I slow down just part of a video?

Yes. In DaVinci Resolve, split the clip where you want the slow section to start (right-click and select "Cut"), then change the speed of only that segment. In CapCut, tap the video, go to Speed, and use the keyframe feature to set different speeds at different times. iMovie does not support this easily.

What if the slowed video looks choppy or jumpy?

This usually means your computer is struggling to process the file in real time. Try exporting at a lower resolution (720p instead of 1080p) or closing other programs. If you are using frame interpolation, turn it off — it looks smoother but takes much longer to process.

Will slowing a video make it look like real slow motion?

Not exactly. Real slow motion is shot at a high frame rate (like 120 fps) and then played at normal speed. Slowing a normal 30 fps video makes it look stretched and less smooth. For action shots, frame interpolation helps, but it is not the same as true slow-motion footage.

Can I undo the slowdown after I export?

You can speed it back up in any editing software, but you cannot recover the original quality if you slowed it down too much. Keep the original file and always edit a copy instead.