Compress MP4
Smaller MP4 videos for messaging, email and uploads.
Files are processed on our server in Europe. Download links expire after 60 minutes; files are then deleted automatically.
Why use Video Compressor
Private and secure
Your video is sent over an encrypted connection to our server in Europe and stored under a random ID. It is never shared with third parties or used to train AI. Download links expire after 60 minutes; files are then deleted automatically, normally within 75 minutes. Read the privacy policy
Honest results
Choose quality, resolution or a target size. Progress comes from the encoder itself, and the result shows the exact size saved, even when a target can't be met.
Free, no sign-up
Video Compressor is free with no account, no watermark and no ads. It works in any modern browser on phone or desktop.
In short
Compress MP4 re-encodes MP4 and M4V videos with H.264 at the quality you choose, optionally lowering the resolution and audio bitrate. If the new file wouldn't be smaller than your original MP4, you get the original back, not a bigger copy.
| Accepted formats | MP4, M4V |
|---|---|
| Maximum file size | 1.00 GB |
| Output | MP4 (H.264 video, AAC audio), max 1080p, never upscaled |
| Video limits | Up to 30 minutes, up to 4K input |
| Target size | Yes, with an honest met / not met result |
| Units | 1 KB = 1,000 bytes; 1 MB = 1,000,000 bytes |
| Where files are processed | On our server in Europe; not sent to third parties |
| Retention | Download link expires after 60 minutes; files deleted automatically, normally within 75 minutes |
| Price | Free, no account, no watermark |
How to use it
- Choose an .mp4 or .m4v file.
- Pick quality and resolution, or a target size.
- Select Compress video.
- Preview and download.
Why MP4 files are often larger than needed
Phones and screen recorders write MP4 at high bitrates so recording never stutters. Re-encoding afterwards with a slower, more efficient encoder setting keeps the same look in far fewer bytes.
Settings that matter most
- Resolution: going from 1080p to 720p cuts the pixel count by more than half, and is usually the most effective single change.
- Audio: speech-only clips sound fine at the Lower (64 kbps) setting.
- Encoding speed (Advanced): Slower takes longer and produces smaller files at the same quality.
Questions
Will my MP4 lose quality?
Some, because H.264 compression is lossy. At High quality the difference is hard to see at normal viewing size.
Does it support H.265 (HEVC) MP4 input?
Yes. HEVC, H.264, VP9 and AV1 input are decoded; output is H.264 for compatibility.
What happens to my video after compression?
It's stored under a random ID on our server in Europe. The download link expires after 60 minutes and the video is then deleted automatically, normally within 75 minutes. Canceling deletes it immediately.
The compressed video won't play. What can I do?
Output is standard MP4 with H.264 video and AAC audio, which plays on nearly every device. If an old TV or car screen refuses it, compress again with "Works on older devices" under Advanced settings.
Related tools
Last reviewed October 31, 2026.