SWF to FLV - Online Video Converter
Convert SWF to FLV online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About SWF to FLV
Convert SWF to FLV. SWF is Adobe's interactive Flash format mixing vector animation with video. FLV is Adobe's Flash-video container carrying Sorenson Spark or H.264 streams. Flash-era players are gone, so convert for current browsers..
Why convert SWF to FLV?
- Smaller files with FLV lossy compression.
- Keep animation and transparency where supported.
- Private, no upload - runs in your browser.
SWF vs FLV
| Animation | Yes | Yes |
|---|---|---|
| Transparency | No | No |
| Compression | lossy | lossy |
| Typical use | SWF is Adobe's interactive Flash format mixing vector animation with video. | FLV is Adobe's Flash-video container carrying Sorenson Spark or H.264 streams. |
When not to convert SWF to FLV
- Skip FLV for archival masters: lossy compression discards detail, so keep the SWF original.
- Keep a master copy: repeated exports stack small losses, so archive SWF before batch FLV shares.
Limits
Starting point: SWF - SWF is Adobe's interactive Flash format mixing vector animation with video. Only the embedded video track converts; scripts and buttons are dropped. Flash-era players are gone, so convert for current browsers. Encode FLV (Sorenson Spark / MP3) from SWF at a bitrate near the source, and confirm the audio track before converting.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.