Convert MP4 to FLV
Free, fast and secure — convert MP4 to FLV right in your browser.
MP4
FLV
Convert MP4 to FLV for wider compatibility
Converting MP4 to FLV gives you a more widely supported file that opens cleanly across more devices, apps and platforms — handy when MP4 will not play nicely everywhere.
How to convert MP4 to FLV
- 1 Drop your MP4 file into the converter above.
- 2 It is converted to FLV automatically — no settings to fiddle with.
- 3 Download your new FLV file instantly.
MP4 vs FLV
| Feature | MP4 | FLV |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | No | No |
| Animation | Yes | Yes |
| MIME type | video/mp4 | video/x-flv |
| Best for | Sharing, streaming and uploading video anywhere with maximum compatibility. | Rescuing old Flash video by converting it to MP4 or WebM. |
About the formats
MP4
MP4 video
MP4 (H.264) is the universal video container. It balances quality and file size beautifully and plays on virtually every device, browser and platform.
Strengths
- Plays almost everywhere
- Great quality-to-size ratio
- Ideal for streaming and social media
Limitations
- Lossy compression
- Less flexible than MKV for multiple tracks
- Older codecs can look dated
Best for: Sharing, streaming and uploading video anywhere with maximum compatibility.
FLV
Flash video
FLV is the old Flash video container. Once dominant for web streaming, it is now obsolete and almost always needs converting to a modern format like MP4.
Strengths
- Small files for its era
- Plays in legacy Flash players
- Common in old web archives
Limitations
- Obsolete — Flash is discontinued
- No support on modern devices
- Lower quality than modern codecs
Best for: Rescuing old Flash video by converting it to MP4 or WebM.
Frequently asked questions
Upload your MP4 file above and it is converted to FLV automatically. When it is ready, download your new Flash video — the whole thing takes just a few seconds in your browser.
Converting MP4 to FLV gives you a more widely supported file that opens cleanly across more devices, apps and platforms — handy when MP4 will not play nicely everywhere.
Converting between compressed formats can introduce minor changes, but our converter keeps your FLV looking as close to the original as possible.
Yes. The converter is free to use, with no watermark and no sign-up required.
Your files are processed securely and are never shared with anyone.