Compress Video to 25MB for Email
Make a smaller local video for an email attachment. The 25MB preset is a starting point, not a guarantee that every mailbox will accept the message. Check the recipient's limit and leave room for other attachments and message overhead.
Quick answer
Check the sender and recipient limits first, choose a target below those limits, and inspect the downloaded video before attaching it. Local processing does not determine compliance with your organization's security or retention policy. VidSlim does not connect to your mailbox or send email.
How to compress a video for email
- Check the limits and approved workflow for both mailboxes.
- Choose a local video. Keep 25MB only as a starting point; lower the target to leave room for other attachments and message overhead.
- Compress, download, and inspect the MP4. Attach it in your mail app yourself, or use an approved cloud-sharing link as a separate step.
Tips for a better result
- Neither 20MB nor 25MB guarantees delivery to every organization.
- For a long video that needs more detail, use an approved sharing workflow rather than forcing a tiny attachment.
Reviewed 2026-09-17
Which email limit applies?
Personal Gmail lists 25MB for total attachments; Workspace administrators can set work or school limits. Outlook.com help lists 25MB for the whole message. Microsoft's separate Outlook client guidance lists 20MB for internet mail and a 10MB default for Exchange. Check the product, account and organization you use; these are not interchangeable guarantees.
Sources: Gmail attachment help · Outlook.com attachment help · Outlook client size guidance · Reviewed 2026-09-17
Frequently asked questions
- What's the maximum attachment size for personal Gmail?
- Gmail lists 25MB for total attachments in a personal account. Work and school accounts can have administrator-defined limits. Other attachments share the budget.
- Should I compress or use a link instead?
- For a short clip that must be attached, target below the applicable limit. For a long video or higher detail, an approved cloud-sharing link may be more suitable. Uploading and emailing are separate steps outside VidSlim.
- Does local processing satisfy my organization's policy?
- Not automatically. Video processing runs in your browser, but that does not establish compliance with security, confidentiality or retention rules. Follow your organization's policy for sensitive material.
Related private video workflow
Need the broader decision tree? Read the guide on compressing video without uploading it. If you need a short silent loop instead of an MP4, try the video to GIF converter.
Trying to send the file as an attachment? Use the guide to send a video by email when the file is too large before deciding whether to compress further or send a cloud link.