Merge MP4 Online - Free
Join several MP4 files into one, and download it as MP4 again. Free, in your browser.
- Free to start
- In your browser
- Up to 1GB
Merge MP4 in 3 steps
Upload your MP4
Drag and drop the MP4 file, or click to browse. Anything under 1GB.
Add the other clips
Add the rest of the files. They play in the order you add them.
Merge and download
The output is already set to MP4. Create a free account to download it, or keep editing in REQO.
Merging MP4 files into one MP4
MP4 is the closest thing video has to a universal format: an MPEG-4 container that almost always holds H.264 video and AAC audio, which every browser, phone, TV and social platform can play without a plugin.
The output format is set to MP4 before you start, so what you download is the same kind of file you uploaded: nothing downstream that expects an MP4 has to be told about a new format. MP4 already plays everywhere, so this is the right output for sharing as well.
Container
Typical codecs
Plays on
File size
| Feature | MP4 |
|---|---|
| Container | MPEG-4 Part 14 |
| Typical codecs | H.264 video, AAC audio |
| Plays on | Every phone, browser, TV and editor |
| File size | Small for the quality |
Before you merge an MP4
An MP4 that plays with no sound usually carries its audio in a codec the player lacks, such as AC-3 from a TV or camera recording. Converting re-encodes the audio to AAC, which everything plays.
YouTube, Instagram and TikTok re-encode every upload, so an MP4 exported at a very high bitrate only makes the upload slower; the viewer never sees the difference.
merge mp4: questions
Will it stay an MP4?
Yes. The output is pre-set to MP4, so the merged file downloads as MP4. You can change it to another format in the panel before exporting.
Does merging an MP4 lose quality?
The part you keep is re-encoded once at a high quality target, so it is not bit-for-bit identical, but it is indistinguishable at normal playback. Editing the same file over and over will eventually show, so keep your original.
Is merging MP4 free?
Yes. Merge and preview free, and a free account downloads the result. Free exports and share pages include a small REQO badge. Go Pro to remove it.
Other presets
Everything else you can do here.
All merge videos presets
Crop for a platform
Crop to a ratio
Resize to a resolution
Compress for a destination
Compress a format
Rotate or flip
Change the frame rate
Extract audio from a format
Subtitles in another language
Convert a caption file
Need more than merge mp4?
REQO is a full browser video editor: record, edit by transcript, caption and export.