FLV to M4V - Online Video Converter
Convert FLV to M4V online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About FLV to M4V
Convert FLV to M4V. FLV is Adobe's Flash-video container carrying Sorenson Spark or H.264 streams. M4V is Apple's DRM-capable MP4 variant used for store-bought video. Copy-protected purchases cannot be converted; use DRM-free sources..
Why convert FLV to M4V?
- Smaller files with M4V lossy compression.
- Keep animation and transparency where supported.
- Private, no upload - runs in your browser.
FLV vs M4V
| Animation | Yes | Yes |
|---|---|---|
| Transparency | No | No |
| Compression | lossy | lossy |
| Typical use | FLV is Adobe's Flash-video container carrying Sorenson Spark or H.264 streams. | M4V is Apple's DRM-capable MP4 variant used for store-bought video. |
When not to convert FLV to M4V
- Skip M4V for archival masters: lossy compression discards detail, so keep the FLV original.
- Keep a master copy: repeated exports stack small losses, so archive FLV before batch M4V shares.
Limits
Starting point: FLV - FLV is Adobe's Flash-video container carrying Sorenson Spark or H.264 streams. Flash-era players are gone, so convert for current browsers. Copy-protected purchases cannot be converted; use DRM-free sources. Encode M4V (H.264 / AAC) from FLV 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.