WaffleFrameJoining clips with different sizes
Phones, cameras and screen recorders all produce different resolutions. The merger uses the first clip's shape as the canvas: a landscape first clip gives a 1920×1080 video, a portrait first clip gives 1080×1920. Every other clip is scaled to fit and centred, with black bars where its shape differs — nothing is stretched or cut off.
Want everything vertical? Convert the clips with the Shorts Maker first, then merge.
Sound, frame rate and silent clips
All clips are converted to the same frame rate (30 fps) and the same audio format, so the joins are smooth and in sync. Clips without any sound get a silent track automatically; that keeps the audio of the next clip from drifting out of sync — a common problem with other joiners.
One merged video, one credit
However many clips you add, the result is one exported file and costs one free use or credit. Your 5 free daily exports are used first, and if the merge fails, the credit is refunded automatically.
A video joiner that keeps your clips private
The merger runs ffmpeg compiled to WebAssembly inside your browser. Your clips are never uploaded: they're combined in your device's memory and saved straight to your downloads. Long merges take a bit more time because your own computer does the work — a desktop browser is fastest.
What the merged video looks like
| First clip | Output size | Frame rate | Audio |
|---|---|---|---|
| Landscape or square | 1920×1080 (16:9) | 30 fps | AAC stereo |
| Portrait | 1080×1920 (9:16) | 30 fps | AAC stereo |
Up to 10 clips per merge. Files up to about 500 MB in total work best.
Who is this for?
Family & travel
Combine the holiday clips from your phone into one video to share.
YouTubers
Stick an intro and outro onto your main recording.
Gamers
Join several highlight clips into one montage.
Teams
Put separate screen recordings together into one walkthrough.
Tips for best results
- Put your best-quality or main clip first — it sets the output size.
- Trim each clip before merging so the joins feel snappy.
- Film all parts in the same orientation to avoid black bars.
- Keep the total under about 10 minutes for the smoothest browser merge.
- Compress the merged video afterwards if you need to send it by chat or email.
Frequently asked questions
How do I merge videos for free?
Drop two or more clips into the merger above, arrange them with the arrows and click Merge. You get one MP4 that plays the clips back to back. Every logged-in account gets 5 free exports per day, reset at midnight Brussels time, and the result has no watermark.
Can I merge videos with different resolutions?
Yes. The first clip decides the output: landscape gives 1920×1080, portrait gives 1080×1920. Other clips are scaled to fit and centred with black bars where needed, so nothing is stretched or cropped. For a fully vertical result, convert the clips to 9:16 first and then merge them.
Is the sound kept when I join videos?
Yes. The audio of every clip is kept and converted to the same format, so it stays in sync across the joins. Clips that have no sound at all get a silent track automatically, which prevents the next clip's audio from starting too early.
Are my clips uploaded to a server?
No. The video joiner runs inside your browser using ffmpeg compiled to WebAssembly. Your clips are read from your disk, combined in memory and saved to your downloads. Nothing is sent to us, which keeps private videos private and means you never wait for an upload.
How many videos can I merge at once?
Up to 10 clips per merge, in MP4, MOV or WebM format. Because your own device does the work, the total size matters more than the number of clips: up to about 500 MB in total works best. Merging on a desktop browser is faster than on a phone.
How many credits does merging cost?
One free use or credit per merged video, no matter how many clips go into it. Your free daily exports are used before paid credits, and if the merge fails for any reason, the credit is refunded to your account automatically.
