The fastest way to join two videos

The simplest method depends on what device you have. On Windows, the built-in Photos app can combine videos in under five minutes. On Mac, iMovie does the same thing. On any device with a web browser, you can use a free online tool like Kapwing or Clipchamp without installing anything. All three approaches produce a single video file where your clips play one after the other with no gap between them.

The key difference between these tools is what you get at the end. The Photos app and iMovie save your combined video to your computer. Online tools usually let you download the file or share it directly to social media. None of them require you to understand video codecs or frame rates — they handle those details automatically.

Key Takeaways

  • Windows Photos app and Mac iMovie are free and built into your device, so you do not need to install anything or pay a subscription.
  • Online tools like Kapwing work on any device and do not require you to save files to your computer, but they may add a watermark unless you pay.
  • The process is the same across all tools: import both videos, arrange them in order, and export the combined file.
  • Your two videos do not need to be the same resolution or frame rate — the software will adjust them automatically.
  • Combining videos takes longer than editing them because the software has to process and re-encode the entire file, which can take 10 to 30 minutes depending on video length.

Joining videos on Windows using Photos

Open the Photos app (search for "Photos" in the Windows search bar). Click the folder icon in the top left and navigate to the folder where your two videos are stored. Select the first video, then hold Ctrl and click the second video to select both. Right-click and choose "Open with" then "Photos".

Once both videos are open in Photos, look for the "Create" button at the top of the window. Click it and select "Video with music". Photos will open a timeline editor. Drag your first video onto the timeline, then drag your second video directly after it. Make sure there is no gap between them on the timeline. Click "Export" at the top right, choose where to save your combined video, and wait for the export to finish. The file will be saved as an MP4 video.

If you cannot find the "Create" button, you may have an older version of Windows. In that case, use the free online tool Kapwing instead — it works the same way but in your web browser.

Joining videos on Mac using iMovie

Open iMovie from your Applications folder. Click "Create New" and select "Movie". A blank timeline will appear at the bottom of the screen. Click the "Import Media" button (camera icon) and navigate to your first video. Select it and click "Import". Repeat this step for your second video.

Both videos will appear in the media library on the left side. Drag your first video onto the timeline, then drag your second video directly after it. Make sure they are touching with no space between them. Click the "Share" button at the top right, select "File", and choose where to save your combined video. iMovie will export it as an MP4 file. The export process usually takes 5 to 15 minutes depending on video length.

Joining videos using an online tool (any device)

Go to Kapwing.com in your web browser. Click "Start Creating" and select "Video Editor". Click "Upload" and select your first video from your computer. Wait for it to upload — this can take a few minutes depending on file size. Once it appears on the timeline, click "Upload" again and select your second video.

Drag your second video onto the timeline so it sits directly after your first video with no gap. Click the "Export" button at the top right. Choose your video quality (1080p is standard) and click "Export Video". Kapwing will process your video, which usually takes 10 to 30 minutes. You will receive an email with a download link when it is ready. If you do not want to wait, you can close the browser and check your email later.

Kapwing adds a small watermark to free videos. If you want to remove it, you will need to pay for a subscription. Clipchamp (clipchamp.com) works the same way and also adds a watermark on the free version.

What to do if your videos are different sizes or formats

You do not need to convert your videos before combining them. Photos, iMovie, and Kapwing all handle different video formats automatically. If one video is 1920x1080 and the other is 1280x720, the software will resize them to match. If one is shot in portrait (vertical) and one in landscape (horizontal), the software will add black bars to make them the same size.

The only time you need to convert videos beforehand is if one is in a very old format that your software does not recognize — for example, an old AVI file from a camera made before 2010. In that case, use a free online converter like CloudConvert to change it to MP4 first, then combine the videos.

Why the combined video takes so long to export

When you combine two videos, the software does not simply glue the files together. It re-encodes the entire video, which means it reads every frame of both videos and writes them to a new file. This process is slow because video files are large — a 10-minute video at 1080p can be 1 to 2 gigabytes. Re-encoding that much data takes time, especially on older computers.

You can speed up the export slightly by choosing a lower resolution (720p instead of 1080p) or by closing other programs while the export runs. However, there is no way to make it fast — this is normal. If your export is taking longer than an hour, something has gone wrong. Close the software and try again.

Common mistakes to avoid

The most common mistake is leaving a gap between the two videos on the timeline. When you drag the second video onto the timeline, make sure it touches the end of the first video with no space between them. If there is a gap, your final video will have a black or frozen frame in the middle.

The second mistake is exporting before both videos are fully imported. If your second video is still uploading and you click Export, the software will only combine the first video. Wait until both videos appear in the timeline and show their full length before you export.

The third mistake is closing the browser or shutting down your computer while an online tool is exporting. If you use Kapwing or Clipchamp, leave the browser tab open until the export finishes. If you close it, you will lose your progress and have to start over.

Frequently Asked Questions

Can I add a transition between the two videos?

Yes. In iMovie, right-click the space between the two videos on the timeline and select "Add Transition". In Photos, click between the two videos and choose a transition effect. In Kapwing, click the space between them and select "Transitions". Most tools offer fade, dissolve, or slide transitions. Adding a transition adds a few seconds to your final video.

What if I want to combine more than two videos?

All three tools work the same way with three or more videos. Import each one and drag them onto the timeline in order. The export process takes longer the more videos you add, but the steps are identical.

Will combining videos reduce the quality?

Yes, slightly. Every time you re-encode a video, you lose a small amount of quality. If you export at the same resolution as your original videos (usually 1080p), the loss is barely noticeable. If you export at a lower resolution, the quality drop will be more obvious.

Can I trim or cut the videos before combining them?

Yes. In Photos and iMovie, you can trim videos before adding them to the timeline. In Kapwing, you can trim them after they are on the timeline. All three tools have a trim button that lets you remove the beginning or end of a video before combining.

What file format should I use for the combined video?

MP4 is the standard format and works on all devices and websites. All three tools default to MP4. If you need a different format for a specific reason, Kapwing offers options like MOV, WebM, and GIF, but MP4 is almost always the right choice.