Gmail limits attachments to 25 MB. Outlook.com caps at 20 MB. Most corporate mail servers impose even tighter limits of 10–15 MB. A 10-second 4K smartphone clip can easily hit 100 MB. Compressing to H.264 MP4 at 480p typically reduces a 1-minute video to 5–15 MB — easily fitting within any email provider's limit. For videos too long to attach, encode at 480p and upload to Drive or Dropbox, then share the link.

Email Video Requirements

Recommended Codec
H.264 (AVC)
Container
MP4
Recommended Resolution
480p (854×480)
Gmail Attachment Limit
25 MB
Outlook.com Attachment Limit
20 MB
Corporate Mail (typical)
10–15 MB
Target File Size
Under 10 MB
Audio Codec
AAC, 128 kbps

Compress Video for Email Attachment — Free Online

Squeeze your video under Gmail's 25 MB attachment limit — H.264 MP4 at 480p.

Create a free account to claim 1000 tokens — enough for about 1000 minutes of 1080p H.264/H.265 or roughly 200 minutes of 1080p AV1 encoding.
Drag & drop a video file here or click to browse
Max file size: 200 MB · Max duration: 300s
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Frequently Asked Questions

What is Gmail's video attachment size limit?

Gmail allows attachments up to 25 MB. If your video is larger, Gmail suggests saving to Drive and sharing the link automatically. Compress to H.264 at 480p to fit under 25 MB for direct attachment.

How do I compress a video to send by email?

Upload your video above, select H.264, MP4, 480p — then click Convert. 480p at H.264 produces the smallest files while remaining watchable. A 1-minute video at 480p H.264 is typically 5–12 MB, well within any email limit.

Can I email a video from iPhone?

Yes. iPhone videos shot in HEVC (H.265) or ProRes are often very large. Convert to H.264 MP4 at 480p before emailing to reduce size by 80–95%. The resulting file attaches easily in Mail, Gmail, or Outlook.

Should I compress video for email or use a link?

For videos under 25 MB after compression, a direct attachment is fine and gets opened more often than links. For longer videos or recipients with strict corporate mail filters (10 MB limit), upload to Google Drive, Dropbox, or YouTube (unlisted) and share the link.

What resolution is good enough for email videos?

480p is perfectly acceptable for email — most people view email on 13–15 inch laptops or phone screens where 480p looks sharp. 720p is a reasonable middle ground if file size allows. There is almost never a reason to email a 1080p video.

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