Most email providers cap attachments at around 25MB, and a video clip from your iPhone camera can blow past that in seconds, even a short one. Grabio’s Compress video (720p) option shrinks the file on your iPhone before you attach it, no app to install.

Why email attachments bounce back

At a glance

Cost
Free, forever
Account
None needed
App Store
No install
Runs on
iPhone, via Shortcuts

Gmail, Outlook, and most other email providers cap individual attachments at around 25MB, and some workplace email systems set the limit even lower. iPhone video, especially anything recorded in 4K, can easily exceed that in a clip lasting well under a minute.

How to Compress a Video for Email on iPhone

When it does, the email either fails to send outright or the recipient’s inbox rejects it, and there’s no built-in way inside Mail to shrink a video before you send it.

How to compress a video for email on iPhone with Grabio

  1. Add Grabio to your iPhone once, it’s a free Apple Shortcut with no App Store download and no sign-up. Add Grabio to your iPhone.
  2. Open the video in your Photos app and tap the Share button.
  3. Scroll down the share sheet and tap Grabio.
  4. Tap Compress video (720p) from the Grabio menu.
  5. Grabio saves the smaller copy to your Photos app. Attach that version to your email instead of the original.

Is it private and free on iPhone?

Yes. The compression runs entirely on your iPhone using Apple’s native video encoder, nothing is uploaded anywhere. Grabio is 100% free with no account, no login, and no subscription.

Compress a video for email on iPhone: FAQ

Will 720p compression get my video under 25MB?

For most short clips, yes, but the result depends heavily on the video’s length. A short clip usually lands comfortably under most email limits, while a longer recording may still come out large enough to need trimming as well. Check the file size after compressing before you attach it.

What if the video is still too big after compressing?

Trim the video down to just the part you need to send, a shorter clip at the same 720p compression will always be a smaller file.

Is there a way to send a video too large for email another way?

Yes, for anything still too large after compressing, a cloud link (iCloud, Google Drive, or similar) is usually a better option than fighting attachment limits, since it doesn’t depend on the recipient’s inbox size at all.

Related on iPhone: compress a video for WhatsApp, trim a video, or Video & Audio Tools.

Most of the video you will be working with here started as a download in the first place, see the full video downloader for iPhone comparison if you still need to pull the source clip.