Online Video Merger
Use Online Video Merger, review the result, and keep the original until the output is checked.
Merge Sequence Preview
How to use Online Video Merger
- Add the clips in the order you want them played; the list is the join order.
- Set Output Format and Quality (the CRF-style scale from 1 to 51, where 23 is the default).
- Leave Preserve original audio ticked unless you want a silent result.
- Press Convert All, then Download All to get merged_video with the extension you chose.
What Online Video Merger actually does to your file
Clips arrive with different codecs, frame rates and sizes, so each one is decoded and re-encoded to a common form before joining - that is what makes an otherwise impossible join work, and it also means every clip in the list loses a generation whether or not it needed converting. Sound that is only present on some clips can shift the join, so keep the audio tracks consistent. Long lists take real time in the browser.
Online Video Merger FAQ
What does Online Video Merger do?
Join supported video clips into one file. Arrange the clips, review the available options, and download the processed video.
Which files work with Online Video Merger?
This category commonly supports MP4, MOV, AVI, MKV, WMV, FLV, WebM, and 3GP. Use the accepted file types shown in the uploader, because support varies by browser and by the engine behind each tool.
Can I change the order of the files before merging?
Reorder the selected files in the list before you run the merge. The output follows the order shown on the page, not the order in which you picked them.
Will my original file be changed?
No. The work is done on a copy in this tab by a WebAssembly build of ffmpeg, and the result arrives as a separate download, so your original is still there if you need it.
How is my file processed?
It is not uploaded. The processing is done locally by a WebAssembly build of ffmpeg, so the practical ceiling is your device's memory and the limit shown beside the uploader - no queue, no account, no copy on a server.
Is the Online Video Merger free?
Yes. The Online Video Merger is free with no trial limit, subscription, or watermark on downloads. You can use it for personal and commercial projects without creating an account.