Why MP4 Is the Best Format for Compression
MP4 (MPEG-4 Part 14) is the universal video format. It wraps H.264 or H.265 video with AAC audio and is supported by every device, browser, and platform. Compressing to MP4 ensures maximum compatibility.
Factors That Affect MP4 File Size
- Resolution: 4K is ~4× larger than 1080p, 1080p is ~4× larger than 480p
- Frame rate: 60fps is ~2× larger than 30fps
- Bitrate: The main compression lever — lower bitrate = smaller file
- Video length: Longer = larger
- Codec: H.265 achieves ~50% better compression than H.264
Step-by-Step: Compress MP4 Online
- Go to Video Compressor.
- Upload your MP4 (drag and drop or click to browse).
- Choose compression level: light, medium, or high.
- Click Compress Video.
- Preview the output quality, then download.
Realistic Compression Results
A 1-minute 4K clip (~200MB) can typically be compressed to:
- ~80MB at high quality (4K → 4K, lower bitrate)
- ~30MB at 1080p
- ~10MB at 720p