Merge Videos Online
Arrange up to six clips and join them into one H.264 MP4. Keep each clip’s first audio track or create a muted result without uploading your source files.
Why merge videos in your browser?
- Adds two to six MP4, MOV, or WebM clips in one local browser session
- Lets you move or remove clips before processing so the order is explicit
- Fits every clip into the first clip’s frame size without stretching the picture
- Keeps the first audio track from every clip when all sources contain audio
- Offers a reliable muted-output option for clips with mixed audio availability
- Exports H.264 video at 30 fps in a fast-start MP4 with no upload or watermark
Frequently asked questions
How many videos can I merge?
You can combine two to six clips per merge, with a 1 GB combined browser limit. Shorter clips are more reliable because every source is decoded and re-encoded on your device.
Can the clips have different dimensions?
Yes. The first clip sets the output frame. Other clips are scaled to fit inside that frame and padded when their aspect ratios differ, so the picture is not stretched.
What happens to audio?
Keep-audio mode joins the first audio track from each clip and requires every clip to contain readable audio. Muted mode removes all audio and is the reliable choice when any source is silent.
What format is the merged video?
The result is an MP4 with H.264 video in the yuv420p pixel format at 30 fps. Kept audio is converted to 48 kHz stereo AAC at 128 kbps.
Is merging lossless?
No. Clips are normalized and re-encoded so different supported containers and frame sizes can become one compatible output. The quality setting balances clarity with browser processing time.
Are my clips uploaded?
No. Reading, ordering, and encoding happen in your browser. Device memory and performance still limit very large or long merges.
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