QT to MKV - Online Video Converter
Convert QT to MKV online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About QT to MKV
Convert QT to MKV. QT is the original QuickTime extension behind Apple's MOV container. MKV is an open container holding multiple video, audio, and subtitle tracks. Only the selected tracks carry over, so pick audio and subtitles first..
Why convert QT to MKV?
- Smaller files with MKV lossy compression.
- Keep animation and transparency where supported.
- Private, no upload - runs in your browser.
QT vs MKV
| Animation | Yes | Yes |
|---|---|---|
| Transparency | Yes | Yes |
| Compression | lossy | lossy |
| Typical use | QT is the original QuickTime extension behind Apple's MOV container. | MKV is an open container holding multiple video, audio, and subtitle tracks. |
When not to convert QT to MKV
- Skip MKV for archival masters: lossy compression discards detail, so keep the QT original.
- Keep a master copy: repeated exports stack small losses, so archive QT before batch MKV shares.
Limits
Starting point: QT - QT is the original QuickTime extension behind Apple's MOV container. Same container as MOV under the older extension name. Only the selected tracks carry over, so pick audio and subtitles first. Encode MKV (H.264 / AAC) from QT 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.