To compress a video for email, shrink it below your provider's attachment limit, which is 25 MB for personal Gmail. The fastest free way is the MobileStudio Video Compressor: pick 25 MB and it encodes the sharpest video that fits. If the video is long, send a link instead, because squeezing several minutes into 25 MB looks rough.
The short answer
| Situation | What to do |
|---|---|
| Short clip, under about 2 minutes | Compress to 25 MB and attach it |
| Long video | Share a Google Drive or iCloud link |
| Several attachments in one email | Compress smaller, the limit is the total |
| Recipient needs full quality | Send a link to the original |
What is the email attachment size limit?
For personal Gmail accounts the limit is 25 MB, and it counts all attachments in the email together. Go over it and Gmail doesn't refuse to send. It quietly swaps your file for a Google Drive link. Other providers set their own limits, so check yours if you don't use Gmail.
To put 25 MB in perspective, a minute of 1080p iPhone video is about 60 MB. Most clips need compressing before they fit.
How do I compress a video for email to exactly 25 MB?
- Open the MobileStudio Video Compressor on your phone or computer.
- Drop in your video.
- Choose 25 MB. If you're also attaching other files, use Custom and type a smaller number.
- Leave Resolution on Auto. It picks the sharpest resolution 25 MB can carry for your video's length.
- Press Compress, then download the MP4 and attach it.
The tool counts 25 MB as 25,000,000 bytes, which keeps it safely under the limit however your email app measures it. It also re-encodes automatically if the first attempt lands over.
How long can a video be and still fit in 25 MB?
It depends on the quality you accept. As a rough guide for H.264 video:
| Length | Resolution that fits 25 MB well |
|---|---|
| 30 seconds | 1080p |
| 1 minute | 1080p or 720p |
| 2 minutes | 720p |
| 4 minutes | 480p |
| 10 minutes | Too small to look good; send a link |
Size is roughly bitrate times length, so doubling the length halves the quality you can afford. Cutting the parts nobody needs with the video trimmer is the cheapest way to buy quality back.
How do I compress a video for email on a computer?
On a Mac, open the video in QuickTime Player and use File > Export As to save a 720p or 480p copy. On Windows, open it in Clipchamp, which comes with Windows 11, and export at 720p or 480p. Neither app lets you pick an exact size, so check the result is under 25 MB before you attach it.
For the full set of methods on every device, see how to compress a video.
When should you send a link instead?
Send a link when the video is longer than a few minutes, when quality matters (a client review or a wedding clip), or when the recipient will edit it. Upload it to Google Drive, iCloud Drive, or Dropbox and paste the share link. On iPhone and Mac, Apple Mail's Mail Drop does this for you for large attachments.
Where MobileStudio fits
The compressor is one of our free tools. MobileStudio itself turns screen recordings of your app into polished product demos you can email or post. Get MobileStudio.
Quick FAQ
How do I send a video that is too large to email?
Compress it under 25 MB with the MobileStudio Video Compressor, or upload it to cloud storage and email the link.
Why does Gmail turn my video into a Drive link?
Because the attachments add up to more than 25 MB. Compress the video below that and Gmail attaches it directly.
Is the 25 MB limit per file or per email?
Per email. All attachments in one message count toward the same 25 MB.
What format is best for an emailed video?
H.264 MP4. It opens on every phone and computer without extra software.
Does compressing a video for email ruin the quality?
Not for short clips. A one-minute video at 25 MB still looks sharp at 1080p or 720p. It's long videos that suffer, so send those as links. If your video has no sound, check why screen recordings are silent before you send it.
