How to Compress Video for Email Without Uploading It

April 2026 · 6 min read · Privacy

Email has a file size limit. Gmail caps attachments at 25 MB. Outlook at 20 MB. If you have a 150 MB interview clip you need to send to a client, what do you do?

The common answer is to upload it to WeTransfer, Google Drive, or Dropbox and share a link. But if the video is sensitive — a legal deposition, a patient consultation, an HR interview — that's not always an option.

The no-upload approach

TrimPrivate compresses video entirely in your browser using FFmpeg.wasm. No upload, no account, no cloud. Here's the process:

1. Drag your video into TrimPrivate
2. If you only need part of it, set trim points on the timeline
3. Choose "Smaller file (lower quality)" in the quality selector
4. Click Export — FFmpeg runs in your browser
5. Download the compressed file and attach it to your email

H.264 at CRF 28 typically reduces file size by 50-70% with acceptable quality for most use cases.