Compress MP4

1. Upload your MP4 file (up to 500 MB).
2. Choose a compression level (Low, Medium, High, Maximum).
3. Click 'Compress MP4' — takes 30 seconds to 5 minutes.
4. Download the smaller MP4.

MP4 videos are often saved at very high bitrates — a 100 MB clip can often fit in 20-30 MB with no visible difference on screens. Compressing MP4 lowers the video bitrate intelligently.

MP4 videos from phones, cameras, and screen recorders are often saved at bitrates far higher than needed for screen viewing. A 4K phone video at 60 Mbps takes 450 MB per minute. Compressing to screen-appropriate bitrates reduces size by 50-80% with no visible difference on phones, laptops, or TVs.

The compressor decodes the MP4 video and re-encodes it at a lower bitrate using H.264. Resolution is preserved (or downsampled for the target size). Audio is preserved at AAC 128 kbps. Output is a smaller MP4 that plays on every device.

• Shrinking phone videos for email attachments.
• Reducing MP4 size for social media upload.
• Fitting more videos on a phone or SD card.
• Reducing cloud storage costs for video archives.
• Preparing videos for messaging apps (WhatsApp, Telegram).
• Uploading to platforms with size limits.
• Optimizing videos for web delivery.

At Medium (720p, 2 Mbps), most MP4 videos look identical to the original on phones, laptops, and TVs. Higher compression levels reduce resolution visibly on large screens but are fine for mobile viewing.

• Re-encoding takes time — large videos take minutes.
• Very high compression reduces resolution visibly.
• 4K videos may be downsampled to 1080p or 720p.
• Some DRM-protected MP4 files can't be compressed.
• Extremely large videos (500+ MB) may take 5-10 minutes.

• Output MP4 plays on every device, OS, and platform.
• Accepted by YouTube, Facebook, Instagram, TikTok, Twitter.
• Works with QuickTime, VLC, Windows Media Player, all phones.
• Standard MP4 — no special software needed.
• Ideal for web, mobile, and email delivery.

• Medium (720p, 2 Mbps) is the sweet spot — 60-70% smaller.
• For mobile viewing, High achieves 70-80% reduction with no visible loss.
• Resolution is preserved at Light — only bitrate drops.
• Videos with a lot of motion (sports, action) compress less efficiently.
• Batch-compress up to 500 MB at once.

Compression is slow

Video re-encoding is CPU-intensive. Expect 30 seconds to 5 minutes depending on length and level.

Quality is visibly worse

The compression level was too aggressive. Use Medium or Light for better quality.

Audio is out of sync

Some MP4 files have unusual audio timing. Re-encode with VLC first, then compress.

• MPEG — MP4 Specification