Video conversion
Convert WebM to FLV
Updated Jul 2026
WebM is the compact video format most modern browsers record and play natively, while FLV is the older Flash Video format some legacy systems still expect. To convert WebM to FLV, open the file in a converter and export it as FLV. Doing this on your own computer means the video never has to travel to someone else's server first.
- Extension
- .webm
- Type
- Video
- Typically
- Web video
- Compression
- Lossy
- Extension
- .flv
- Type
- Video
- Typically
- Legacy web video
- Compression
- Lossy
Convert WebM to FLV on your own computer. Nothing uploads.
How to convert WebM to FLV
- Open Morphjet and drag in the WebM file, or a whole folder of them, you want to convert.
- Choose FLV as the output format.
- Convert. The FLV file is written right next to your original, and nothing leaves your machine.
WebM vs FLV: what actually changes
| WebM | FLV | |
|---|---|---|
| File size | Smaller, efficient modern compression | Larger for the same visual quality |
| Quality | High, efficient for its size | Similar after conversion, with a small re-encoding loss |
| Plays in modern browsers | Yes, natively | No, browsers stopped supporting Flash content years ago |
| Typical use today | Web video, screen recordings, browser playback | Legacy systems, old encoders, and older desktop software that still expect it |
| Streaming support | Standard for modern web streaming | Was once common for streaming, now mostly retired |
When to convert, and when not to
Convert WebM to FLV when an older system, like a legacy content management platform, an aging broadcast encoder, or a desktop editing tool from the Flash era, only accepts Flash Video files.
Keep the WebM if you're just playing or sharing the video normally, since WebM already works in every current browser and FLV needs an older or specialized player to open at all.
Why not just use an online converter?
An online converter needs a copy of your video sitting on its server before it can hand you back an FLV file, and you have no real way to know how long that copy sticks around. Converting on your own computer skips that step entirely. The video goes from WebM to FLV on your machine and never travels anywhere else.
Questions
Does converting WebM to FLV lose quality?
There's a small, one-time quality loss from re-encoding, since the two formats compress video differently. For most legacy playback purposes it won't be noticeable.
Will the FLV file play in my browser?
Probably not directly. Browsers dropped support for Flash content years ago, so you'll generally need an older or specialized media player, or the legacy system you're converting it for, to open an FLV file.
Why would anyone still need FLV in 2026?
Mostly for compatibility with older software, streaming setups, or archival systems that were built around Flash Video and were never updated to accept newer formats.
Can I convert WebM to FLV without uploading it anywhere?
Yes. A desktop app like Morphjet converts the file locally on your own computer, so the video never has to leave your machine or pass through anyone else's server.
Morphjet converts WebM, FLV, and 1,800+ other formats, all on your machine. Launching this July.