A video merger that joins clips in the order you choose

How to combine videos into one

1. Press Select videos, or drop two or more clips anywhere on the page. They appear as cards in a row, called the reel.
2. Drag the cards into the order you want. You can also select a card and press Alt with the left or right arrow key to move it.
3. Pick the Quality and decide whether to keep the sound. The panel shows how many clips you have and the total length.
4. Press Merge, and save the joined video.

You need at least two clips. Until you have them, the tool tells you to add more. To add a clip later, use the Add clips tile at the end of the reel. To drop one, press the × on its card.

The preview plays your clips one after another, in the order shown, so you can check the sequence before you merge. The finished file is called merged.mp4.

Put the clips in order

Each card in the reel has a number, a small picture from the clip, its name, its length and its size in pixels. The number shows its place in the final video. The order you see is the order you get, so this is where you put videos together into a story that flows.

• Drag a card to a new place. A bar shows where it will land.
• Select a card and press Alt with the left or right arrow key to move it one place at a time. This works without a mouse.
• Press the × on a card to remove that clip from the merge.

The panel keeps a running total beside the reel. Clips shows how many clips are in the merge, and Total length shows how long the finished video will last. If the total is longer than you expected, check that you have not added the same clip twice.

You can also play any card to check it on its own. Click a card to select it, and the preview shows that clip. This is a quick way to find the right take before you decide where it goes, or whether it belongs in the merge at all.

Merge MP4 files without re-encoding

Joining is quickest when every clip was made the same way: the same picture size, the same picture settings and the same kind of sound. Then the pictures are joined exactly as they are. Nothing is compressed again, so there is no loss and the job takes little time.

Because the result is an MP4, copying works for H.264 picture with AAC sound, a common pair in MP4 files. So when you combine MP4 files of that kind, recorded at the same settings, they can join as they are. Clips in another codec, such as HEVC or VP9, are converted even when they match each other.

The tool checks the clips against clip 1 for you. Every card carries a small badge, and a note above the settings sums it up.

The match check looks at what can be read before the job starts, so the note says the clips “should” join without re-encoding rather than promising it. When the job is finished, the Done screen reports what really happened.

Merge clips of different sizes

Phone clips, screen recordings and downloaded files rarely match. When one or more clips differ from clip 1, every clip is converted to clip 1’s size and frame rate before they are joined, the matching ones included. Where a clip has a different shape, bars fill the gaps so nothing is stretched.

Converting takes longer than copying, and the Quality setting decides how much detail is kept. Smaller gives a smaller file, Balanced is the middle choice, and Best keeps the most detail. The setting only matters when the clips need converting. If they all match, it is not used at all.

Keep the sound or leave it out

Keep the sound is on when you start. Switch it off and the merged video has no audio at all, which is handy for a silent montage you plan to put music under later. To add a soundtrack afterwards, use Add audio to video.

If one clip has no sound while Keep the sound is on, the join takes longer and that clip’s part is filled with silence, so the sound stays in step with the picture.

Good ways to use the merge

• Combine videos into one after you filmed in short bursts, so you have a single file to share.
• Put an intro and an outro on either side of a main clip.
• Re-join the pieces after you split a long video with Split video.
• Tidy each clip with Trim video first, then merge the good parts.

Make every clip face the right way before it goes in the reel. If writing in a selfie take reads backwards, flip the video left to right. If a shot needs its top and bottom swapped, make an upside down video of it first.

If the result is larger than you can send, run it through Compress video. If you need a format other than MP4, the Convert video tool changes it.

Formats, size and privacy

The video merger opens common video files, including MP4, MOV, WebM, MKV, M4V, AVI, WMV, TS, FLV and MPG, and the result is always an MP4. Most videos have no size limit. Some files, such as certain AVI or WMV videos, are handled more slowly, and then the clips can be up to 2 GB in all.

Think of it as a video joiner that lives in a browser tab. Your clips are read from your disk and processed there. The server does no video work, so nothing is uploaded and there is nothing to delete afterwards. The tool works in current Chrome, Edge and Firefox.

It is free, with no account and no watermark on the merged video. Video tools do not count towards the free daily limit that applies to document conversions.