What is the email attachment size limit?

Gmail allows attachments up to 25MB total. Microsoft Outlook limits attachments to 10MB (Outlook.com allows 20MB). Yahoo Mail allows 25MB. To be safe for all providers, the Email preset targets 10MB, which works everywhere.

Should I use Gmail or Outlook's limit?

If you know both you and the recipient use Gmail, you can target 25MB. However, if the recipient might use Outlook or another provider with a 10MB limit, it's safer to compress to 10MB. The Email preset uses 10MB for maximum compatibility.

What's the best format for email video attachments?

MP4 is the best format for email attachments because it's universally playable. The recipient can open it on any device without installing special software. Avoid WebM or MKV as some email clients may not preview them inline.

Is there a better way to share large videos by email?

For videos larger than 25MB, most email providers (Gmail, Outlook) will offer to share via their cloud storage (Google Drive, OneDrive) instead of attaching directly. This is better for very large files. Use this compressor when you need the video as an actual attachment.

Will the compressed video play inline in emails?

Most email clients don't play video inline — the recipient downloads and plays it locally. Some modern email clients and webmail interfaces may offer a preview. For the best experience, use MP4 format and keep the file as small as possible.

Compress Video for Email

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Compress your videos to fit email attachment size limits. Works for Gmail (25MB), Outlook (10MB), and other providers. All processing happens in your browser — your files never leave your device.