How to Send Large Files Through Email
You attach a file, hit send, and a few seconds later the email bounces back: "Message size exceeds the limit." It's one of the most common frustrations at work, and it usually happens at the worst possible moment, when a client is waiting for a video or a teacher needs a project before the deadline.
The fix is simpler than most people expect. Instead of forcing a big file into an attachment, you upload it once and email a download link. This guide explains why email has size limits, what those limits are, and how to send large files through email without the bounce-back.
Email Attachment Size Limits
Every major email provider caps how big an attachment can be. The exact numbers vary, but they're all small compared to modern files:
- Gmail: 25MB per email. Anything larger is turned into a Google Drive link automatically.
- Outlook.com: around 20MB for regular attachments.
- Yahoo Mail: 25MB per email.
There's also a hidden catch. Attachments are encoded before they're sent, which makes them roughly a third bigger in transit. In practice, a file of 18 or 19MB can already push a 25MB limit over the edge. And even if your provider accepts the file, the recipient's mail server might not, especially in corporate inboxes with stricter rules.
Why Zipping Rarely Solves It
The first thing most people try is compressing the file into a ZIP. That works well for text documents and spreadsheets, which can shrink a lot. But photos, videos, and PDFs are usually already compressed, so zipping them saves very little. A 60MB video will still be close to 60MB inside a ZIP.
Splitting a file into several emails is another workaround, but it's fiddly for you and confusing for the person receiving it. If one part goes missing, the whole file is useless.
The Better Way: Email a Download Link
Rather than attaching the file, upload it to a file sharing service and paste the download link into your email. The email itself stays tiny, so it never bounces, and the recipient gets the original file at full quality.
Here's how to do it with File Sender:
- Go to the File Sender homepage and select one or more files from your device.
- Add a title and, if you like, a short message so the recipient knows what they're getting.
- Choose how long the link should stay active: 1, 3, or 5 days.
- Click upload, copy the link, and paste it into your email.
When the recipient opens the link, they see a download page with every file listed, its size, and a download button. There's no account to create on either side. File Sender currently handles uploads of up to 100MB, which is four times the Gmail limit and enough for most documents, photo sets, and short videos.
Tips for Sending Large Files by Email
- Mention the file name and size in your email, so the recipient knows what to expect before clicking.
- Pick an expiry that matches how quickly they'll download it. A short expiry is safer for anything confidential.
- Send multiple related files in one transfer instead of several separate links.
- Double-check the recipient's address before sending, because anyone with the link can download the files.
If you're regularly moving bigger files, our guide on how to transfer large files quickly covers more ways to speed up the upload itself.
Key Takeaways
Email attachment limits sit around 20 to 25MB, and zipping rarely gets a large photo or video under that. The reliable fix is to upload the file once and email a link. It keeps your message light, avoids bounce-backs, and delivers the original file to the recipient.