How many videos can I join?

There is no fixed number: the limit is the device’s memory.

Can I join videos of different sizes?

Yes. Those with a different aspect ratio are centered in the frame, without stretching.

Because the transition overlaps the end of one video and the start of the next. Choose “None” between the two to add up the full durations.

Each image comes in as a 5-second scene.

Join the files in the right order and export one.

Images come in as 5-second scenes.

Choose 9:16, 1:1, 4:5 and other frame formats.

There are 16 transitions, such as fade, dissolve, slide, push, zoom, wipe, circle and spin.
The transition overlaps the end of one video and the start of the next, so the total gets shorter: in the test, two 6 s videos became 12.05 s without a transition and 11.24 s with a 0.8 s fade.
In the Automatic format, the frame follows that of the first video.

It is not possible to trim inside each video on this page; for that, trim beforehand or use the full editor.
Everything happens in the browser: the video is not sent. Large files depend on the device’s memory and capacity.
The video is rebuilt on export (it is not a direct copy): choose the quality and size under Export.
MP4 depends on the browser having an H.264 encoder; without it, the app records in real time (it takes as long as the video, with the tab open).
This page does only this task. Timeline, texts, effects and animations are in the full editor.

How many videos can I join?: There is no fixed number: the limit is the device’s memory.
Can I join videos of different sizes?: Yes. Those with a different aspect ratio are centered in the frame, without stretching.
Why did the final video come out shorter than the sum of the videos?: Because the transition overlaps the end of one video and the start of the next. Choose “None” between the two to add up the full durations.
How long does an image last?: Each image comes in as a 5-second scene.