Free for Windows 10 and 11 · works offline
Compress a video to under 20 MB for email
Gmail and Outlook stop attachments at about 20–25 MB, and chat apps have limits too. Tell S Converter the limit and it works out the right quality from the video’s length.
How to do it with S Converter
- Open S Converter, choose Video and drag in your video.
- On the right, switch Quality to Max size and pick 20 MB (or 8, 10, 16, 25, 50 or 100 MB, or Custom…).
- Press Convert.
- The MP4 is saved next to the original, under the limit.
Or one click: Email
- Select the video in File Explorer and press Ctrl + Alt + C.
- Press Tab for Presets and click Email: an MP4 under 20 MB.
The shortcut works while S Converter is running (it waits in the system tray). In the version from GitHub you can also right-click files and choose S Converter; on Windows 11 it's under Show more options.
Why S Converter
Fits first time
If the first try lands slightly over, S Converter tries again a little smaller.
Sensible resolution
Long videos at small limits drop to 720p or 480p so they stay clear.
Fast
Uses your NVIDIA, Intel or AMD graphics card when it can.
Questions
What about a very long video?
Over about 10 minutes, 20 MB means low quality. Trim it first, or share a link instead.
Which limit for WhatsApp?
Pick 16 MB, or use the WhatsApp preset.
Is the video uploaded?
No. It’s converted on your PC.
Related guides
Get S Converter
Free, no ads, no account. Images, video, audio, documents, PDFs and archives, all converted on your own PC.