Free MP4 Compressor
Reduce MP4 file size without losing quality. 100% free, runs entirely in your browser.
Your video is processed 100% in your browser. Nothing is uploaded to any server.
How to Compress an MP4 Online
- Click the upload area and select an MP4 file.
- Choose a quality preset — Balanced is recommended for most use cases.
- Optionally lower the resolution to shrink the file even further.
- Click "Compress MP4" and download the result when it's ready.
Why Reduce MP4 File Size?
- Faster Uploads: Smaller MP4s upload faster to social media, cloud storage, and video platforms. Save time and bandwidth.
- Save Storage: Reduce cloud storage costs and keep your media library manageable. A 1-minute 4K MP4 can be over 500MB uncompressed.
- Email & Messaging: Most email services limit attachments to 25MB. A compressed MP4 is easier to share via email, Slack, WhatsApp, or Discord.
- Web Performance: Embedded MP4 videos on websites load faster when compressed, improving user experience and reducing bounce rates.
MP4 Compression Quality Guide
| Quality Preset | Best For | Typical Savings |
|---|---|---|
| High Quality (CRF 23) | Professional work, archiving, high-detail content | 20-40% |
| Balanced (CRF 28) | Social media, web videos, general sharing | 40-60% |
| Small File (CRF 33) | Email attachments, messaging apps, previews | 60-75% |
| Smallest (CRF 38) | Low-bandwidth scenarios, quick previews, thumbnails | 75-90% |
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MP4 Compressor FAQs
Common questions about compressing MP4 videos
Is this MP4 compressor free?
How do I reduce MP4 file size without losing quality?
How much can I reduce the MP4 size in MB?
Will compression reduce video quality?
Which quality preset should I use?
Are my videos uploaded to a server?
What is CRF (Constant Rate Factor)?
Can I compress an MP4 and change resolution?
What is the maximum file size?
Can I compress WebM or MOV videos?
Does compression preserve audio?
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