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.
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 2026-06-13
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.