How to Send Large Files by Email (Gmail, Outlook, Yahoo, iCloud)
By the Novaxera team · Published · 6 min read
Short answer
To send a large file by email, first check the limit: Gmail, Outlook.com and Yahoo Mail allow 25 MB of attachments per email, and iCloud Mail allows 20 MB per message. If the file is bigger, compress it, split it into parts, or share a cloud link instead, such as Google Drive, OneDrive or iCloud Mail Drop, which handles files up to 5 GB.
Key takeaways
- Gmail, Outlook.com and Yahoo Mail allow 25 MB of attachments per email; iCloud Mail allows 20 MB per message.
- Gmail and Outlook.com offer to share larger files as Google Drive or OneDrive links instead of attachments.
- Compressing PDFs and images is often enough to get under the limit without changing how the file is shared.
- For very large files, a cloud link or a messaging app with a higher limit is usually the simpler route.
What are the email attachment size limits?
The major personal email services cap attachments at 20 to 25 MB per message. Work accounts can be higher. These values were checked on the providers' official pages on October 18, 2026:
| Service | Attachment limit | Larger files |
|---|---|---|
| Gmail | 25 MB per email | Become Google Drive links |
| Outlook.com | 25 MB per email | Shared as OneDrive links |
| Microsoft 365 / Exchange Online | 35 MB send, 36 MB receive by default | Admins can raise it up to 150 MB |
| Yahoo Mail | 25 MB total attachments | Share a cloud link instead |
| iCloud Mail | 20 MB per message | Mail Drop, up to 5 GB, expires after 30 days |
| Proton Mail | 25 MB send, 50 MB receive | Share a cloud link instead |
The full list, including chat apps and cloud storage, is on the file size limits page.
What happens if a file is over the limit?
An attachment over the limit is either blocked or turned into a link. Gmail turns larger attachments into Google Drive links, and Outlook.com offers to share them through OneDrive. iCloud Mail can send large attachments with Mail Drop. Other services simply refuse to attach the file.
The recipient's limit matters as well. A message that leaves one service can still bounce if the receiving server accepts less. Attachments are also encoded for sending, which makes them larger in transit, so a file just under the limit may still fail. Leave some headroom.
Option 1: Compress the file
Compressing the file is the simplest fix when it is only slightly over the limit. It keeps the file as a normal attachment, so the recipient does not need to open a link or sign in anywhere.
- PDFs: Novaxera's Compress PDF downscales images larger than 1200 px, re-encodes JPEGs at quality 72 and cleans up the file. Text stays sharp. Scans and photo-heavy PDFs shrink the most; text-only PDFs shrink little.
- Photos: Compress Image re-encodes JPEG and WebP at quality 75 and keeps the original dimensions. PNG is optimized without pixel changes, so savings are usually smaller.
- Many photos: combine them into one document with Images to PDF, then compress that PDF.
- Other files: a ZIP archive bundles many files into one attachment, but already compressed files such as JPEG, MP4 or PDF usually shrink little inside a ZIP.
Results depend on the file. Novaxera shows the exact saving after each compression, so it is easy to see whether the file now fits.
Option 2: Split the file into parts
Splitting works when no single part needs to be over the limit. A long PDF can be sent across two or three emails, each under the cap.
Novaxera's Split PDF turns every page into its own PDF, delivered as one ZIP. Combine the page groups you want with Merge PDF, then attach one group per email. Number the parts in the file names and subject lines so the recipient knows the order. For documents with pages nobody needs, removing them is often enough on its own.
Option 3: Share a cloud link instead
A cloud link is the most practical option for very large files. The file is uploaded to storage once, and the email carries only a link.
- Google Drive: Gmail offers to insert large files as Drive links. Drive accepts files up to 5 TB each.
- OneDrive: Outlook.com shares large files as OneDrive links. The OneDrive website accepts files up to 250 GB each.
- iCloud Mail Drop: sends attachments up to 5 GB; the download link expires after 30 days.
- Dropbox: accepts files up to 2 TB each and can share a link in any email.
Check the sharing permissions before sending. A link that only the owner can open is a common reason a recipient cannot get the file.
Option 4: Use a messaging or work chat app
Messaging apps accept much larger files than email. They are a good choice when the recipient already uses the same app.
| App | File limit |
|---|---|
| Documents 2 GB; videos 100 MB by default | |
| Telegram | 2 GB (4 GB with Premium) |
| Discord | 20 MB free, 50 MB Nitro Basic, up to 1 GB Nitro |
| Slack | 1 GB |
For formal documents such as contracts or job applications, email with an attachment or a cloud link is usually more appropriate than a chat message.
Which option should be used? A quick decision list
Choose the method by how far over the limit the file is and who receives it.
- Check the file size and the attachment limit of both the sender's and the recipient's email service.
- If it is a PDF or image and only somewhat over the limit, compress it and check the new size.
- If it is still too large, remove unneeded pages or split it into parts and send several emails.
- If it is far over the limit, or is a video or archive, upload it to cloud storage and email the link.
- If the recipient uses the same messaging app, sending it there is another option within that app's limit.
Frequently asked questions
What is the maximum attachment size in Gmail?
Gmail allows up to 25 MB of attachments per email. When the attachments are larger, Gmail turns them into Google Drive links instead of attaching them. Because attachments grow slightly when they are encoded for sending, files just under 25 MB can still fail, so leave some headroom or compress the file first.
How can a 50 MB PDF be sent by email?
A 50 MB PDF can be sent by compressing it, splitting it, or sharing it as a cloud link. Compression works well on scanned or photo-heavy PDFs; Novaxera's Compress PDF accepts files up to 50 MB. If the result is still too big, split the PDF into parts or upload it to Google Drive or OneDrive.
How large a file can be sent from iCloud Mail?
iCloud Mail allows 20 MB per message as normal attachments. For larger attachments, Mail Drop can send files up to 5 GB by uploading them to iCloud and sending a download link. The Mail Drop link expires after 30 days, so the recipient should download the file before then.
Does zipping a file make it small enough to email?
Zipping helps mainly with uncompressed files such as text, spreadsheets or raw documents. Files that are already compressed, such as JPEG photos, MP4 videos and most PDFs, usually shrink very little inside a ZIP. For PDFs and photos, a dedicated compressor that re-encodes images normally saves more space.
Is it safe to compress files online before emailing them?
Novaxera uploads files over an encrypted HTTPS connection and processes them on its servers. The original upload is deleted as soon as processing finishes, and the result is deleted automatically within 60 minutes. Files are not shared or used for anything else. For confidential PDFs, add a password with Protect PDF and send the password separately.