Merge Videos
Join multiple video clips into one, in the order you set — in your browser.
Select video files
MP4, MOV, WebM — joined in your browser, in real time (about the total length)
Click to choose, or drop a file here
About merging videos in the browser
This joins several video clips into one file without uploading anything. It plays each clip in turn onto a single canvas and records the whole sequence with the browser's `MediaRecorder`, so the clips don't need to share a codec, resolution or frame rate — each is scaled to fit one common frame size (letterboxed if the shapes differ) as it plays.
Because it records in real time, the wait is roughly the total length of all the clips, and the result is re-encoded once. That makes it well suited to stitching a handful of short clips — phone videos, screen recordings, downloaded segments — into one shareable file.
The output is MP4 where your browser can record it (Chrome, Safari) and WebM otherwise. For frame-exact concatenation of long files with no re-encode, a desktop editor is still the right tool; for a quick join that never leaves your device, this is the fast path.
Supported files
Accepts any videos your browser can play (MP4, MOV, WebM…). Produces one MP4 or WebM.
Is my file uploaded?
No. Every clip is played and re-recorded entirely in your browser — nothing is sent to a server.
Common problems
- It's very slow
- Merging runs in real time — the wait is the total length of the clips. Trim them first if you only need parts.
- A clip looks stretched or has black bars
- Clips of different aspect ratios are fitted into one frame size. Crop them to a common ratio first with Crop Video.
How to Merge Videos
- 1
Add your clips
Drop in two or more videos — they're read in your browser.
- 2
Set the order
Use the arrows to arrange the clips; they play back to back.
- 3
Merge and download
Click Merge; the clips are played and re-recorded into one file in real time.
Related PDF tools
Merge Videos — frequently asked questions
Do the clips need to match?+
No. Each clip is scaled to fit one common frame size (letterboxed if aspect ratios differ) as it's recorded.
Is anything uploaded?+
No — every clip is played and re-recorded in your browser.
Why does it take so long?+
It plays each clip in turn and records the result, so the wait is roughly the total length of all the clips.
What format do I get?+
MP4 where your browser supports recording it, otherwise WebM.
Do you upload my files to a server?+
No — every tool here processes your files entirely on your device, and nothing is uploaded to a server. The only exception is the AI tools, which send the extracted text (not the file) to Claude to do their work.
Is there a file size limit?+
There's no artificial limit we impose, but since processing happens in your browser, very large files (500+ MB or 1,000+ pages) are limited by your device's memory rather than by us.
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