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WebM to DAT - Online Video Converter
Convert WebM to DAT online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert WebM to DAT
Drop WebM video here or click to select
WebM
DAT (MPEG-2 / MP2)
About WebM to DAT
Convert WebM to DAT. WebM pairs VP9 video with Opus audio and supports an alpha channel. DAT is the Video-CD sector dump wrapping MPEG-1 streams. Rip sector headers first; raw sector dumps may fail to open..
Why convert WebM to DAT?
- Smaller files with DAT lossy compression.
- Keep animation and transparency where supported.
- Private, no upload - runs in your browser.
WebM vs DAT
| Animation | Yes | Yes |
|---|---|---|
| Transparency | Yes | No |
| Compression | lossy | lossy |
| Typical use | WebM pairs VP9 video with Opus audio and supports an alpha channel. | DAT is the Video-CD sector dump wrapping MPEG-1 streams. |
When not to convert WebM to DAT
- Skip DAT for archival masters: lossy compression discards detail, so keep the WebM original.
- Flatten transparency first: DAT has no alpha channel, so composite WebM over a background color.
Limits
Starting point: WebM - VP9 video with Opus audio and alpha support. Apple editors accept it unevenly; keep MP4 for editing round-trips. Rip sector headers first; raw sector dumps may fail to open. Encode DAT (MPEG-2 / MP2) from WebM 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.
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FAQ
How do I convert WebM to DAT?
Drop your WebM file onto this page, choose quality and codec settings, then click Convert. The result downloads as DAT instantly. All processing runs in your browser.
What codec is used for DAT?
The default codec for DAT is MPEG-2 / MP2. You can change the video and audio codec in Advanced mode.
How do you store my files?
We do not store any processed videos. All conversion happens entirely in your browser using FFmpeg WASM.