When a video is too large to send with Gmail
Gmail says the file is too large, or quietly replaces your attachment with a Google Drive link. Here is why, and how to keep it as an attachment.
Why a 25MB video will not fit a 25MB limit
Gmail allows attachments up to 25MB (Google’s official help, checked September 12, 2026).
A video of exactly 25MB still will not send. Email converts attachments to base64, which makes them larger in transit. Google says the same thing in its help for receiving limits: the value is the limit after encoding, “which adds about a 37% increase”.
| Your file | Handled by email as | Fits in 25MB? |
|---|---|---|
| 25MB | About 34MB | No |
| 20MB | About 27MB | No |
| 18MB | About 24.7MB | Yes |
| 10MB | About 13.7MB | Easily |
That is why SakuConvert’s Gmail page aims at 18MB.
Sending it as an attachment
- Open compress for Gmail.
- Choose your video. The target starts at 18MB.
- Check the estimate and save the file.
- Attach the result in Gmail.
If the video is too long to fit, you are told how short it needs to be. Use edit the length to keep just the part that matters.
When it turns into a Google Drive link
Above 25MB, Gmail uploads the file to Google Drive and puts a link in the message instead. That is convenient, but:
- The other person may not be able to open it — people outside your organisation often have to request access.
- When the file itself matters (a record, or someone who will watch it offline), a smaller attachment is more reliable.
- Deleting the file from Drive later also takes it away from them.
Their inbox has its own limit
What you can send and what they can receive are different numbers.
- Company mail systems sometimes stop at 10MB.
- When it matters, ask first.
- If you do not know, building a 10MB file is the safe choice.