Compress Video to 25MB for Email
Gmail and Outlook.com both document a 25MB attachment limit. This tool re-encodes your video locally in your browser to fit under that ceiling — no upload to any server, no account needed.
Quick answer
To send a video as an email attachment, compress it below the recipient's attachment limit before opening your mail app. This preset targets 25MB and processes the file locally; use a smaller target or a cloud link when a mailbox applies a stricter policy.
How to compress a video for email
- Choose the video you want to attach to the message.
- Compress it to 25MB, or lower the target when the recipient has a stricter limit.
- Download the result and attach it in Gmail, Outlook, or your preferred mail app.
Tips for a better result
- Leave a little size margin because mail systems can calculate attachment overhead differently.
- Use a cloud link for long videos when keeping higher visual quality matters more than attaching the file.
Reviewed 2026-07-14
Why the 25MB limit exists
Gmail and Outlook.com use a 25MB attachment ceiling; larger files may need to be shared through cloud storage instead. Work or school administrators can impose different limits, so a slightly smaller target is safer when the mailbox policy is unknown.
Sources: Gmail attachment limits · Outlook.com sending limits · Reviewed 2026-07-14
Frequently asked questions
- What's the maximum attachment size for Gmail?
- Gmail documents a 25MB attachment limit. Keep the final file a little below the stated limit because other mail providers or workplace policies may be stricter.
- Should I compress or use a link instead?
- For videos under a couple of minutes, compressing keeps things simple for the recipient. For long or high-quality videos, a Drive/Dropbox link preserves quality better.
- Is this private enough for work videos?
- Yes — processing happens entirely on your device via WebAssembly. Nothing is uploaded, which makes it suitable for confidential material that can't be sent to third-party servers.
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.