Convert QuickTime (.qt) to MPEG-4 Part 14 (.mp4) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .mov file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mp4 file when it's ready.
The MP4 format (MPEG-4 Part 14, ISO 14496-14) was directly derived from Apple's QuickTime container specification — making this conversion a homecoming of sorts. While QT and MP4 share the atom/box architecture, MP4 standardized specific codecs (H.264, H.265, AAC) and metadata structures for universal compatibility. Converting QT to MP4 transforms Apple's proprietary container into the world's most widely supported video format, playable on virtually every device, browser, and platform.
QT files are limited to Apple software, and QuickTime for Windows was deprecated in 2016 with known security vulnerabilities. MP4 is universally supported — every web browser, smartphone, smart TV, streaming platform, and social media site accepts MP4. This single conversion eliminates all compatibility barriers while preserving quality.
FFmpeg re-encodes video to H.264 High Profile (or copies the stream if already H.264-compatible) and audio to AAC-LC. The MP4 container is written with 'ftyp isom' branding for maximum compatibility, moov atom placed at the file start (faststart), and proper sync sample table for accurate seeking. Typical output uses CRF 22 with the 'slow' preset for optimal quality-to-size ratio.
When the QT source contains H.264 video and AAC audio, stream copying produces identical quality instantly. When re-encoding from ProRes or other high-quality QT codecs, CRF 22 produces visually transparent results — even professional colorists struggle to distinguish the output from the source in blind tests.
| Device | MOV | MP4 |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Partial | Native |
| Linux | Partial | Native |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
QT to MP4 is the single most impactful conversion for QuickTime content owners. It transforms Apple-only files into universally playable content with minimal to zero quality loss. For any QT file destined for sharing, streaming, or web use, MP4 is the definitive target format.
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| Funktion | MOV | MP4 |
|---|---|---|
| Fulde navn | Apple QuickTime Movie | MPEG-4 Part 14 |
| Filendelse | .mov | .mp4 |
| Bedst til | High quality | Universal compatibility |