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.

Make an email-safe video now

FitToMB dials in the bitrate so attachments stay under the limits you see in this guide. Pick the preset that matches your recipient's inbox and upload your file.

Open 25MB preset 20MB Outlook default 50MB link-friendly

If your clip still bounces, drop to the 20MB preset or send via Drive/OneDrive after compressing.

What's the email attachment limit?

Gmail 25MB, Outlook desktop 20MB, Outlook.com 25MB, Yahoo Mail 25MB, iCloud Mail 20MB (Mail Drop up to 5GB). Dive deeper with the Gmail video size guide, Outlook attachment guide, iCloud Mail guide, and Yahoo Mail attachment guide.

Best way to send longer clips?

Compress to 25MB (MP4 H.264 + AAC, two-pass) or share a cloud link (Drive/OneDrive/Mail Drop). Use the Gmail calculator or Yahoo calculator to pick the right bitrate.

Current limits by provider

Provider Attachment limit Cloud fallback
Gmail 25MB (sending) Auto-converts to Google Drive link over 25MB - use the Gmail calculator for sizing.
Outlook.com 25MB Share via OneDrive for larger files - see the Outlook guide or jump straight to the 25MB preset.
Outlook (desktop / Exchange) 20MB default Admins can lower caps to 10-25MB - use the Outlook attachment guide for compression presets and OneDrive workflow.
Yahoo Mail 25MB (message total) Dropbox handoff above 25MB - plan with the Yahoo calculator.
iCloud Mail 20MB Mail Drop up to 5GB - follow the iCloud Mail guide or open the 20MB preset.

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.