Convert FLV to MP4
Free, fast and secure — convert FLV to MP4 right in your browser.
FLV
MP4
Convert FLV to MP4 for wider compatibility
Converting FLV to MP4 gives you a more widely supported file that opens cleanly across more devices, apps and platforms — handy when FLV will not play nicely everywhere.
How to convert FLV to MP4
- 1 Drop your FLV file into the converter above.
- 2 It is converted to MP4 automatically — no settings to fiddle with.
- 3 Download your new MP4 file instantly.
FLV vs MP4
| Feature | FLV | MP4 |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | No | No |
| Animation | Yes | Yes |
| MIME type | video/x-flv | video/mp4 |
| Best for | Rescuing old Flash video by converting it to MP4 or WebM. | Sharing, streaming and uploading video anywhere with maximum compatibility. |
About the formats
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.
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.
Frequently asked questions
Upload your FLV file above and it is converted to MP4 automatically. When it is ready, download your new MP4 video — the whole thing takes just a few seconds in your browser.
Converting FLV to MP4 gives you a more widely supported file that opens cleanly across more devices, apps and platforms — handy when FLV will not play nicely everywhere.
Converting between compressed formats can introduce minor changes, but our converter keeps your MP4 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.