Email video attachment limits in 2025

Most inboxes cap attachments around 25MB. Here are the exact limits for major providers and the fastest way to fit your clip-then compress with one click.

What's the email attachment limit?

Gmail 25MB, Outlook.com 25MB, Yahoo Mail 25MB, iCloud Mail 20MB (use Mail Drop up to 5GB).

Best way to send longer clips?

Compress to 25MB (MP4 H.264 + AAC, two-pass) or share a cloud link (Drive/OneDrive/Mail Drop).

Current limits by provider

Provider Attachment limit Cloud fallback
Gmail 25MB (sending) Auto-converts to Google Drive link over 25MB
Outlook.com 25MB Share via OneDrive for larger files
Yahoo Mail 25MB (message total) -
iCloud Mail 20MB Mail Drop up to 5GB

Work/school accounts may enforce stricter limits (e.g., 10-20MB) - compress to 20MB or share a cloud link if messages bounce.

One-click presets that work

25MB

Great for most providers. Keep audio around 96 kbps; use 720p or 480p on longer clips.

Open 25MB preset

50MB

Use when you'll share via Drive/OneDrive/Mail Drop. Higher quality, still fast to upload.

Open 50MB preset

Step-by-step (quick)

  1. Drop your video into FitToMB.
  2. Select 25MB (or 50MB for cloud sharing).
  3. We run two-pass H.264 and right-size audio to keep quality.
  4. Download MP4 and attach, or share via Drive/OneDrive/Mail Drop.

FAQ

Why does my 20MB file fail?

Some corporate or older mail systems enforce lower limits, or the MIME-encoded size grows. Target 20MB or use a cloud link.

Do I need to change codec?

No. MP4 (H.264 + AAC) is the most compatible across webmail and mobile clients. HEVC/AV1 may be smaller but aren't universally supported.

Is 720p OK for email?

Yes - email previews are small. For long clips, 480p + 24-30 fps preserves detail while staying within 25MB.