Compress Video for Email

Marukit's Compress Video for Email is a free web tool that shrinks a video to attach to an email. It aims a little under the size you pick, encodes an H.264 MP4 that plays on phones and computers, and checks the real output size.

Drop a file here or choose a file MP4, MOV, WebM, MKV, AVI, M4V · up to 95 MB and 20 minutes

Your video is uploaded over HTTPS, processed on our server, and deleted automatically: the upload as soon as processing ends, the result 30 minutes after it is ready.

About this tool

According to Gmail Help, personal Gmail accounts can send up to 25 MB of attachments; bigger files are added as a Google Drive link instead. 20 MB is filled in to leave a margin under that limit.

Official limits

Gmail: personal accounts can send up to 25 MB of attachments; bigger files are added as a Google Drive link. Gmail Help: Attach files

Last checked 13 November 2026. Limits can change; trust what your own email app shows. Marukit isn't affiliated with Google.

How to use the email video compressor

Choose the video.
Keep 20 MB, or pick a smaller size if your email service has a lower limit.
Pick a resolution: 720p for short clips, 480p for longer ones.
Press Compress, check the verified size, download the MP4 and attach it to your email.

Not working? Quick fixes

Video too long to fit? Choose a bigger target, or trim the clip first.
Gmail still adds the video as a Drive link? Remove other attachments, or compress again at 16 MB.
'This file isn't a supported video'? Upload an MP4, MOV, WebM, MKV or AVI file.

Supported formats

Input: MP4, MOV, WebM, MKV, AVI, M4V
Output: MP4 (H.264 video, AAC audio)
Processing: On our server, files deleted automatically

Limitations

Up to 95 MB and 20 minutes per video.
Long videos may not fit at a watchable quality. At 20 MB, about 10 minutes is the longest video that fits; for longer ones you'll be asked to pick a bigger target or a shorter clip.
The 25 MB Gmail limit is for all attachments together. If you attach other files too, pick a smaller size.
Work and school accounts can have different limits set by the administrator.
Audio is encoded at 96 kbps AAC to leave more room for the picture.
Location and other metadata are removed from the output file.

Need bigger files or batch processing? and we'll consider it for a future paid plan.

Frequently asked questions

What is Gmail's attachment size limit?

According to Gmail Help, 25 MB for personal Gmail accounts. Work and school accounts have limits set by their administrator.

Why is 20 MB filled in and not 25 MB?

To leave a margin under the 25 MB limit for the rest of the email. If Gmail still turns the video into a Drive link, compress it again at 16 MB.

What if my video is too long to fit?

Pick a lower resolution, trim the clip first, or share it as a link through a cloud drive instead of attaching it.

Will the video play on the other person's phone?

The output is an MP4 with H.264 video and AAC audio, the most widely supported combination for phones, computers and email apps.

Is my video kept?

No. The upload is deleted as soon as processing ends, and the result 30 minutes after it's ready.