Email feels like the simplest way to send a video to a client, a teacher, a relative or a colleague. Then you hit the attachment limit: Gmail swaps the file for a Drive link, Outlook refuses it, or the message bounces back from the other person's inbox. Here's why that happens and the best ways to get your video through.

Email attachment limits

Every email provider caps the total size of a message:

Provider Attachment limit
Gmail 25 MB
Yahoo Mail 25 MB
Outlook.com 20 MB
Work and school email Often 10 to 25 MB, set by IT

Two things catch people out:

  • The limit is for the whole message, including every attachment, not per file.
  • Attachments grow by about a third when sent, because email encodes files as text. A 20 MB video can count as roughly 27 MB, so aim lower than the headline number.

Even if your provider accepts a big file, the recipient's provider might reject it. Staying under about 20 MB of real file size is the safe zone.

Option 1: Compress the video so it attaches directly

This is the best option when you want the video to play right inside the recipient's inbox, with no links and no sign-ins.

  1. Open the email video compressor.
  2. Drop in your video.
  3. Leave Under 25 MB (email) selected and press Convert.
  4. Download the smaller file and attach it to your email.

The compressor calculates exactly how much quality fits in the size budget based on your video's length. Short and medium videos usually look almost identical to the original. For Outlook.com or strict work email, a video under about 4 minutes leaves comfortable room.

How much video fits in 25 MB?

As a rough guide after compression:

  • Up to 2 minutes: looks great, close to the original.
  • 2 to 5 minutes: good quality, slightly softer in fast motion.
  • 5 to 8 minutes: watchable, best for talking-head videos or screen recordings.
  • Over 8 minutes: consider a link instead (option 2).

For long videos, a link to cloud storage keeps full quality:

  • Gmail offers to share large files through Google Drive automatically.
  • Outlook does the same with OneDrive.
  • iPhone Mail offers Mail Drop for files up to 5 GB, with links that last 30 days.

The downsides: the recipient has to click through, the link may require sign-in depending on its sharing settings, and links eventually expire or get deleted. Check the sharing settings ("anyone with the link") before you send.

Option 3: Trim before you send

Often the whole video isn't needed. Sending just the important 30 seconds is kinder to the recipient and fits easily in an email. Trim on your phone first (on iPhone: open the video in Photos, tap Edit and drag the ends; on Android: open it in Google Photos or your gallery and tap Edit), then compress the shorter clip if it's still too big.

Tips for the best result

  • Start from the original file, not a copy that was already sent through a messaging app, since those are compressed heavily already.
  • Convert iPhone videos to MP4 first if the recipient uses Windows or an older device. Our MOV to MP4 converter handles that, and the email compressor also outputs MP4.
  • Name the file clearly before attaching, like site-visit-march.mp4 instead of IMG_4821.MOV.
  • Send yourself a test email if it's important, to check the video plays on another device.

Which option should you choose?

  • Under 5 minutes and you want it to "just work": compress it with the email compressor.
  • Long video or full quality matters: send a cloud link.
  • Only part of the video matters: trim it, then compress.

Need to share on Discord instead? It has a lower 10 MB limit for free accounts. See how to compress a video for Discord.