How to Convert RMVB to MP4 — Quick & Free
Fast, instant RMVB to MP4 conversion. No signup required. Just drop your .rmvb file and get .mp4 in seconds.
Batch Settings
About RMVB to MP4 Conversion
Short answer: yes, you can convert RMVB to MP4 online for free, and quality is well preserved with the right settings. Just upload your .rmvb file to CocoConvert, pick MP4 as the output, and click Convert. The whole process takes seconds.
Now for the details. RMVB is a widely used file format. MP4 (MPEG-4 Part 14) is the universal video container supporting H.264/H.265 codecs — plays on virtually every device. Converting between these two formats lets you convert between formats quickly.
Your RMVB file is decoded and re-encoded as MP4. Converting RMVB to MP4 maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert runs entirely online — no software to install, no account to create. Your files are encrypted during upload (TLS), processed on isolated servers in Germany, and permanently deleted after 24 hours. It works in Chrome, Safari, Firefox, Edge, and all mobile browsers.
Need to convert more than one file? Free users can do 5 per hour. Pro gets 100 per hour with files up to 5 GB each.
How to Convert RMVB to MP4
- 1
1. Upload RMVB
Drop your .rmvb file onto the page (or tap "Browse" on mobile). Add multiple files for batch conversion.
- 2
2. Select MP4
Choose .mp4 from the output dropdown. Settings are pre-configured for best results.
- 3
3. Convert
One click. The server handles all the heavy lifting using FFmpeg and Sharp.
- 4
4. Download
Your .mp4 file is ready. Download it directly or get all files as a zip archive.
What Happens When You Convert RMVB to MP4
Your RMVB file is decoded and re-encoded as MP4.
Your RMVB file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in MP4 format
The converted file is ready for download
Format Comparison
RMVB
.rmvb file
| Extension | .rmvb |
| MIME Type | application/vnd.rn-realmedia-vbr |
| Category | Video |
MP4
.mp4 file
| Extension | .mp4 |
| MIME Type | video/mp4 |
| Category | Video |
Should You Convert RMVB to MP4?
When to Convert
- ✓When you need a MP4 file
Frequently Asked Questions
Is RMVB to MP4 conversion free?
Yes. CocoConvert offers free RMVB to MP4 conversion with generous daily limits — 25 minutes of processing time and up to 5 files per hour (250 MB each). Pro plans remove these limits.
How fast is RMVB to MP4 conversion?
Most files convert in 2–10 seconds depending on size. Large video files may take 30 seconds. Batch jobs process in parallel for maximum speed.
What happens to my files after conversion?
Your uploaded RMVB file and the converted MP4 file are both automatically deleted from our servers within 24 hours. They are never shared, sold, or analysed.
Does converting RMVB to MP4 lose quality?
Converting RMVB to MP4 maintains high quality with CocoConvert's optimised encoder settings.
Can I convert MP4 back to RMVB?
Yes, CocoConvert supports MP4 to RMVB conversion as well. However, if the original conversion involved lossy compression, converting back won't recover the lost data.
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