Video Converter
Convert iPhone MOV to MP4 or WebM for web optimization instantly in your browser.
Drag video here to convert
100% Local • MOV, MP4, MKV, WebM
Video Conversion Use Cases
Frequently Asked Questions
Q. What is the difference between container and codec conversion?
Container (MP4, MKV) is the wrapper, while Codec (H.264, VP9) is the compression. Changing just the container is fast; changing the codec requires re-encoding.
Q. Are there file size limits?
Conversion happens in your browser's memory. For large files, ensure you have enough RAM (8GB+ recommended for 4K).
Q. Will I lose audio or subtitles?
Our converter attempts to preserve all audio tracks. Note that some containers (like WebM) have limited subtitle support.
Q. Can I convert multiple files at once?
Currently, we support single file processing to ensure stability and performance in the browser.
Q. Is there quality loss during conversion?
If you change the codec, some loss occurs. Using high bitrates or lossless settings can minimize this.
📦 Video Container vs. Codec Comparison
The container holds the data, while the codec determines how it is compressed.
| Container | Video Codecs | Audio Codecs | Main Trait |
|---|---|---|---|
| MP4 | H.264, H.265 | AAC, MP3 | Universal Compatibility |
| MOV | ProRes, H.264 | ALAC, AAC | Apple Ecosystem Standard |
| MKV | Any | Any | Supports multiple tracks/subs |
| WebM | VP8, VP9, AV1 | Vorbis, Opus | Optimized for Web |
| AVI | H.264, MPEG-4 | MP3, PCM | Legacy Windows Support |
| FLV | H.264 | AAC, ADPCM | Old Flash Streaming |
💡 Note: MP4 is the most recommended format for general use.
🖥️ Codec Compatibility Matrix
| Codec | iOS | Android | Windows | macOS | Smart TV | Efficiency |
|---|---|---|---|---|---|---|
| H.264 | ✅ | ✅ | ✅ | ✅ | ✅ | 100% |
| H.265/HEVC | ✅ | ⚠️ | ⚠️ | ✅ | ✅ | 55% |
| VP9 | ⚠️ | ✅ | ✅ | ✅ | ⚠️ | 50% |
| AV1 | ✅ | ✅ | ✅ | ✅ | ❌ | 35% |
| ProRes | ✅ | ❌ | ❌ | ✅ | ❌ | 800%+ |
Conclusion: H.264 MP4 is still the safest for web distribution. Use H.265 or AV1 for space savings, but keep H.264 as a fallback.
Key Features
- Universal mp4 to webm and mov to mp4 conversion
- Advanced codec control (H.264, H.265, VP9, AV1)
- 100% local processing - your video never leaves your computer
- Optimized video format converter for web and mobile
Convert video formats like MP4, MOV, and WebM instantly in your browser. Our video format converter ensures privacy and speed without server uploads.