Compress a video for email
Gmail and most other email services cap attachments at around 20 to 25 MB, and anything bigger turns into a cloud link the recipient has to open separately. Compress the video to 25 MB, or lower for stricter work email servers, and attach it directly.
MP4, MOV or M4V. Free up to 100 MB. Your video stays on your device.
Size limits
| Gmail | 25 MB total attachments |
|---|---|
| Stricter work servers | Often 10 to 20 MB |
Source: Gmail Help, attachment size limit.
How it works
- Choose a video. It stays on your device.
- Pick the size you need. Altols works out the bitrate and resolution that fit.
- Your browser re-encodes the picture as H.264 and copies the sound across untouched.
- Download the MP4.
Frequently asked questions
Is the 25 MB limit per file or per email?
Per email, for all attachments combined. If you are sending more than one file, give each a smaller target.
Will the recipient be able to play it?
Yes. The output is an MP4 with H.264 video, which plays on Windows, macOS, iPhone and Android without extra software.
Is my video uploaded anywhere?
No. Altols uses your browser's built-in video encoder, so the video is processed on your device and never leaves it.
Is there a size limit?
Free compression works on videos up to 100 MB. For larger videos, up to 1 GB, a 24-hour pass costs $2.99 USD.