RMVB to MP4 converter
Convert RMVB to MP4 in seconds, free and unlimited. No upload, no sign-up, no watermark: your video never leaves your device.
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Quick answer: To convert RMVB to MP4, add the RMVB file to the iHateFiles RMVB to MP4 converter and press Convert. The conversion runs in your browser, so the file is never uploaded, and it is free with no sign-up, watermark or size limit. RMVB is a format most software has stopped opening. MP4 is not.
Should you convert RMVB to MP4?
Yes, if the RMVB will not play where you need it. MP4 with H.264 plays on essentially everything, which is why nearly every other video format is converted to it.
The picture is re-encoded
An RMVB usually holds RealVideo at a variable bitrate with RealAudio sound. This writes H.264 video with AAC sound into the MP4. Both sides are compressed with loss, so this is a second generation: leave the quality at its default or higher, because the encoder is working from RMVB artefacts rather than the original.
Expect a smaller MP4
H.264 video is a much more efficient codec than what an RMVB holds, so at the same visual quality the MP4 is usually a third to a half of the size.
Where the MP4 will play
MP4 plays on every phone, laptop, TV, browser and messaging app.
RMVB and MP4 side by side
| RMVB | MP4 | |
|---|---|---|
| Inside the file | RealVideo at a variable bitrate with RealAudio sound | H.264 video with AAC sound |
| Compression | Lossy | Lossy |
| Carries sound | Yes | Yes |
| Plays on | VLC, and very little else today | every phone, laptop, TV, browser and messaging app |
| Here | Read only | Read and write |
What usually goes wrong
About the RMVB. The quality ceiling was set when the file was made, on a dial-up budget. Converting preserves it rather than improving it.
About the MP4. Two MP4 files can behave completely differently depending on the codecs inside. A file that will not play is usually an unusual codec in an ordinary container, not a broken file.
How to convert RMVB to MP4
- Add your RMVB file. It is read from your disk and stays there.
- Check the settings. The output format is already set to MP4.
- Press convert and the MP4 file is saved back to your device.
Questions
How do I convert RMVB to MP4?
Open this page, add your RMVB file, and press convert. The file is decoded and re-encoded by your own browser and saved back to your device. Nothing is uploaded.
Is this RMVB to MP4 converter free?
Yes, completely. There is no account, no sign-in, no watermark and no daily limit, because there is no server doing the work. Your own device does it.
Are my files uploaded anywhere?
No. There is no upload endpoint. The conversion runs inside this browser tab, so your file never leaves your device. You can open your browser's network panel and watch: nothing carrying your file is sent.
Is there a file size limit?
No fixed limit. Because the work happens on your machine there is no server quota. The only ceiling is your own device's memory, which for video means very large files may be slow.
Will converting to MP4 lose quality?
MP4 is a lossy format, so some detail is discarded. The quality control on this page decides how much. The default is set high enough that most people cannot see the difference.
Can I convert several RMVB files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.