Email was built for messages, not for 4K videos or folders of RAW photos. Every big provider caps attachments, and once your file goes over the cap the email simply will not send. The good news: you do not need a paid plan or special software. You upload the file once, get a download link, and paste that link into your email. The person you send it to clicks it and downloads the full-quality file.
Email attachment size limits in 2026
Here is how big an attachment each major email service accepts, and what it does when you go over.
| Email service | Attachment limit | What happens above it |
|---|---|---|
| Gmail | 25 MB | Gmail offers to upload the file to Google Drive and send a Drive link instead |
| Outlook.com and Microsoft 365 | 20 MB (some company servers set 10 MB) | Outlook offers to upload to OneDrive and share a link |
| Yahoo Mail | 25 MB | The file is refused; you need a link service |
| Apple Mail (iCloud) | 20 MB normally, up to 5 GB with Mail Drop | Mail Drop uploads to iCloud and sends a link that lasts 30 days |
| FileTransferBox | 10 GB free per transfer | You paste one download link into any email |
Limits are the ones each provider publishes as of October 2026. Email encoding adds about a third to file size, so a 25 MB limit fits a file of roughly 18 to 19 MB.
The fastest way: send a download link
A link works with every email app, every device and every recipient, and the file never touches the email server, so size limits stop mattering.
- Open FileTransferBox in any browser. No sign-up.
- Add your files or a whole folder. Up to 10 GB per transfer on the free plan.
- Add a password if the files are private. It is free.
- Choose Get a link, or type the recipient's email address and we send it for you.
- Paste the link into your email in Gmail, Outlook, Yahoo or any other app, and press send.
Tip: mention in your email how long the link lasts (7 days on the free plan) so the recipient downloads it in time.
Send a file too big for email, free up to 10 GB.
Send files freeHow to send large files through Gmail
Gmail accepts attachments up to 25 MB. When you attach something bigger, Gmail uploads it to Google Drive and puts a Drive link in the email. That works, with three catches: the file uses your 15 GB of free Google storage, you have to set sharing permissions correctly or the recipient sees "Request access", and the file stays in your Drive until you delete it.
Option 1: paste a FileTransferBox link (no storage used)
- Upload your file at the FileTransferBox send page and copy the link.
- In Gmail, press Compose, write your message and paste the link.
- Send. The recipient does not need a Google account.
Option 2: use Gmail's Google Drive button
- Press Compose, then the Google Drive icon at the bottom of the window.
- Choose the file (upload it first if it is not in Drive yet) and select Drive link.
- When Gmail warns that the recipient does not have access, choose Anyone with the link.
How to send large files in Outlook
Outlook.com and most Microsoft 365 accounts stop attachments at 20 MB, and many company mail servers set an even lower limit of 10 MB. Above that, Outlook offers to upload the file to OneDrive. If you are emailing someone outside your company, OneDrive links are often blocked by their IT policy or need a Microsoft sign-in, which is why a plain download link is usually smoother.
- Upload the file to FileTransferBox and copy the link.
- In Outlook, create a New mail and paste the link into the body.
- Add a short note with what the file is and when the link expires.
If you must keep files inside Microsoft 365 for compliance, use OneDrive's Share button and set the link to "People you choose" instead.
How to send large files via Yahoo Mail
Yahoo Mail caps attachments at 25 MB and has no built-in cloud fallback in most accounts, so a large attachment just fails. Upload the file to FileTransferBox, copy the link, and paste it into your Yahoo message. That is the only step.
How to email large files from iPhone and Android
iPhone and iPad
The Mail app offers Mail Drop for attachments above about 20 MB. It uploads up to 5 GB to iCloud and the link lasts 30 days. It works well between Apple users, but needs iCloud turned on and fails for bigger files. For anything up to 10 GB, open the FileTransferBox send page in Safari, tap to add files from Photos or Files, then share the link through Mail, Messages or WhatsApp.
Android
The Gmail app uses the same 25 MB limit and Drive fallback as the desktop version. In Chrome, open FileTransferBox, tap to add files from your gallery or file manager, and share the link from any app.
Should you zip or compress the file?
Zipping helps with folders of documents: it bundles many files into one and can shrink text and spreadsheets a lot. It barely shrinks videos, photos, PDFs that are mostly images, or audio, because those formats are already compressed. Compressing a video to fit under 25 MB means visibly lower quality. If quality matters, send the original through a link instead.
- Zip: many small files, documents, code, spreadsheets.
- Do not bother zipping: MP4, MOV, JPEG, PNG, most PDFs.
- Never compress: final client deliverables, RAW photos, footage for editing.
Sending large videos, photos and PDFs by email
Videos. One minute of 4K iPhone video is roughly 170 to 400 MB, far above any attachment limit. See our guide on how to send large video files.
Photos. A single RAW photo is often 25 to 60 MB. Put the shoot in a folder and send the whole folder as one link.
PDFs. Scanned or image-heavy PDFs quickly reach 30 MB or more. A link keeps the original quality for printing.
Sending large files outside your organization
Work accounts often block external sharing from OneDrive or Google Drive, or force the recipient to sign in. A FileTransferBox link needs no account on either side. Add a password, share the password through a different channel (for example a text message), and the link expires automatically after 7 days, so nothing lingers.
Frequently asked questions
How do I send a large file through email?
Upload the file to FileTransferBox, copy the download link and paste it into your message. This works in Gmail, Outlook, Yahoo and every other email app, for files up to 10 GB free.
How do I email a large file over 25 MB?
Email apps stop at 20 to 25 MB, so send a link instead of an attachment. Upload the file, copy the link, and paste it into your email.
How can I send a file that is too large for email?
Upload it to a file transfer service such as FileTransferBox, copy the download link, and paste the link into your email. The recipient clicks it to download the full file. You can send up to 10 GB free.
What is the maximum attachment size in Gmail?
25 MB. Larger files are uploaded to Google Drive and sent as a Drive link, which uses your Google storage.
What is the attachment limit in Outlook?
Usually 20 MB for Outlook.com and Microsoft 365. Some company mail servers set 10 MB. Larger files need OneDrive or a download link.
How do I send large files via email for free?
Use a free transfer link. FileTransferBox sends up to 10 GB with no account, no ads while you send and a free password, and the link works in any email app.
How do I send large files via email outside my organization?
Use a download link that does not require the recipient to sign in. Add a password for private files and share it separately.
Is it safe to send large files with a link?
Yes, if you use a service that encrypts files and lets the link expire. FileTransferBox sends every file over an encrypted HTTPS connection, offers a free password and deletes files when the link expires.