Sending a video by email sounds simple until you hit the attachment limit. Gmail caps attachments at 25 MB. Outlook at 20 MB. Many corporate email systems sit even lower, at 10 MB. A typical 1080p video at default camera settings runs 100–500 MB per minute — nowhere near those limits. This guide shows you how to compress any video small enough to send as an email attachment, free, without making it look terrible.
Email Attachment Limits by Provider
| Email Provider | Attachment Limit | Notes |
|---|---|---|
| Gmail | 25 MB | Over 25 MB auto-converts to Google Drive link |
| Outlook / Hotmail | 20 MB | Microsoft 365 business accounts may vary |
| Yahoo Mail | 25 MB | — |
| Apple Mail (iCloud) | 20 MB via Mail Drop | Mail Drop sends as link, not attachment |
| Corporate email (typical) | 10–15 MB | Set by IT policy; varies widely |
Step 1: Trim to Only What’s Needed
Before compressing, trim. File size is directly proportional to duration — a 2-minute clip is half the size of a 4-minute clip at the same settings. Use the free Video Trimmer to cut your video to exactly the segment that needs to be in the email. Remove any intro silence, outro, or content that isn’t relevant to your recipient.
Step 2: Compress with the Video Compressor
Go to videotoolshack.com/tools/video-compressor.php and load your (already trimmed) video.
Start with Medium compression. This typically reduces file size by 60–80% with minimal visible quality loss for most content. If the result is still too large, try High compression or reduce resolution (720p instead of 1080p).
After processing, check the file size before attaching. If it’s under your target (10–25 MB depending on recipient), you’re done. If still too large, run it through again at a higher compression level or lower the resolution.
Realistic File Size Targets by Duration
As a rough guide for a compressed 720p video at medium quality:
- 30 seconds — approximately 3–8 MB (safe for all providers)
- 1 minute — approximately 6–15 MB (safe for Gmail, Outlook)
- 2 minutes — approximately 12–30 MB (may need high compression for smaller limits)
- 5+ minutes — consider a link instead of an attachment
When to Use a Link Instead
For videos over 2–3 minutes, email attachment is often the wrong delivery method even if the file technically fits — large attachments clog inboxes and are slow to open on mobile. Consider uploading to Google Drive, Dropbox, or YouTube (unlisted) and sharing the link instead. The recipient gets a better experience, and you avoid attachment size anxiety entirely.