Compress MP4 Videos Online - Free
Compress MP4 video files online for free. Reduce video size by up to 70% while maintaining watchable quality. No server upload.
Upload files
or drag and drop files here
Max file size: 500MB
Your files are processed locally in your browser. Nothing is uploaded to any server.
How to Compress MP4 Videos
Upload MP4 Video
Select your MP4 video file. The tool runs entirely in your browser, so no video data is uploaded to any server.
Choose Compression Settings
Adjust resolution, bitrate, and quality. Lower resolution and bitrate produce smaller files. Preview estimated output size.
Download Compressed Video
Save your compressed MP4 with reduced file size. Share it via email, messaging apps, or upload to social media.
Frequently Asked Questions
How much can MP4 video be compressed?
MP4 compression can reduce video file size by 40-70% depending on original encoding, resolution, and target quality. A 100MB video can often be reduced to 30-50MB while maintaining watchable quality. Videos originally recorded at very high bitrates see the largest reductions.
Does video compression reduce resolution?
Not necessarily. You can compress video by reducing bitrate alone while keeping the original resolution. However, reducing resolution from 1080p to 720p is an effective way to dramatically cut file size. On mobile screens, the visual difference between 720p and 1080p is often imperceptible.
What is the best resolution for sharing videos online?
720p (1280x720) is the sweet spot for sharing via email and messaging apps, offering good quality at manageable file sizes. For social media uploads, 1080p is recommended since platforms apply their own compression. For WhatsApp and similar apps with size limits, 480p keeps files under 16MB.