FLV to MP4
Convert FLV files to MP4 in seconds, for free. Nothing to install.
Files are deleted from the server automatically after 1 h.
Why convert FLV to MP4?
- MP4 files are usually several times smaller than FLV — faster to send and upload.
- MP4 is one of the most widely supported formats — it opens almost anywhere.
You don't need to install any software to convert FLV to MP4. Upload your file, choose MP4 and download the result a few seconds later. The conversion runs on our servers and your file is deleted automatically after 1 h.
FLV vs MP4: comparison
| Feature | FLVFlash Video | MP4MPEG-4 Video |
|---|---|---|
| Developer | Macromedia / Adobe | MPEG (ISO) |
| Released | 2002 | 2001 |
| Type | video | video |
| Compression | lossy | lossy |
| Opens with | VLC, MPV | VLC, Windows Media Player, QuickTime |
Tip: converting to 720p or 480p makes the file much smaller.
How it works
- Choose or drop your FLV file.
- Pick MP4 as the output format.
- Click “Convert” and download your file.
FLV to MP4: questions and answers
Will quality be lost when converting FLV to MP4?
MP4 uses compression, but at the default settings the difference is hard to hear or see. You can choose a higher bitrate in Options.
How long does FLV to MP4 conversion take?
It depends on the length: a short file takes a few seconds, a long video can take a few minutes. Progress is shown as a percentage.
What is the maximum FLV file size?
Up to 500 MB per file and up to 20 files at once — for free.
Can I convert FLV to MP4 on my phone?
Yes. TezConvert works in any browser on Android and iPhone — no app needed.
How do I open a MP4 file?
MP4 files open in: VLC, Windows Media Player, QuickTime.
Are my files safe?
Files are used only for the conversion, never shown to anyone, and deleted automatically after 1 h. The original is deleted right after conversion.
⇄ Need the opposite? Convert MP4 to FLV →