Email has a size limit, usually 20 to 25 megabytes, so files bigger than that will bounce back or never arrive

Most email providers — Gmail, Outlook, Yahoo — reject messages with attachments over a certain size. Gmail's limit is 25 megabytes. Outlook's is 20 megabytes. Yahoo's is 25 megabytes. If you try to send a file larger than your provider's limit, the email either fails silently (you think it sent, but it didn't) or you get a rejection notice hours or days later.

The size limit exists because email servers have to store and move millions of messages every second. A single 500-megabyte video file would clog the system. So instead of fighting the limit, you use a tool designed to handle large files: a file-sharing service, a cloud storage link, or a service built specifically for sending big attachments.

Key Takeaways

  • Email attachments larger than 20 to 25 megabytes will not arrive, depending on your email provider.
  • Google Drive, Dropbox, and OneDrive let you upload a file once and send a link instead of attaching the file itself.
  • File-transfer services like WeTransfer and Tresorit are free for single transfers and require no account from the person receiving the file.
  • Compressed files (ZIP or RAR format) reduce file size but usually not enough to get a video or photo collection under the email limit.
  • The recipient needs to be able to open the file format you send — a video file, a Word document, a spreadsheet — so check before you send.

Using cloud storage to send a link instead of a file

The easiest method for most people is to upload the file to a cloud storage service you already use, then send a link in the email instead of the file itself. The recipient clicks the link, downloads the file, and you never hit an email size limit.

If you use Google (Gmail, Google Photos, Google Workspace), upload to Google Drive. Click "New" in the left sidebar, select "File upload", choose your file, and wait for it to finish. Right-click the file, select "Share", and choose whether the link works for anyone with the link or only for specific people you add. Copy the link and paste it into your email.

If you use Microsoft (Outlook, OneDrive), upload to OneDrive. Click "Upload" at the top, select your file, and wait. Right-click the file, select "Share", and choose your sharing settings. Copy the link and send it in email.

If you use Dropbox, the process is the same: upload, right-click, share, copy link, paste into email. All three services let you set an expiration date on the link (so it stops working after a week or a month) and a password if you want extra security.

Using a file-transfer service for one-time sends

If you do not want to create an account or upload to a service you use regularly, a file-transfer service handles a single large file and deletes it after a set time. WeTransfer is the most common. Go to wetransfer.com, click "Add your files", select the file from your computer, type in the recipient's email address and your email address, and click "Transfer". WeTransfer uploads the file and sends the recipient a link. The file stays available for seven days, then deletes automatically.

WeTransfer is free for files up to 2 gigabytes. Larger files require a paid account. Tresorit works similarly and offers 5 gigabytes free per transfer. Sync.com offers 5 gigabytes free and encrypts the file in transit, meaning the service itself cannot see what you are sending.

The recipient does not need an account with any of these services. They click the link, read the file, and that is it. The file is not stored on their computer permanently unless they choose to keep it.

Compressing files to make them smaller

Compressing a file reduces its size, but usually not enough to get a large video or photo collection under the email limit. A 100-megabyte folder of photos might compress to 90 megabytes. A video file compresses very little because video is already compressed when it is recorded.

To compress on Windows, right-click the file or folder, select "Send to", and click "Compressed (zipped) folder". Windows creates a new ZIP file in the same location. On Mac, right-click the file or folder and select "Compress". The compressed file is usually 10 to 30 percent smaller than the original, depending on what is inside.

Compression is useful when you are close to the email limit — a 22-megabyte file might compress to 18 megabytes and fit through Gmail. But for truly large files (videos, design files, software installers), compression alone will not solve the problem. Use it as a first step, then switch to a cloud link or file-transfer service if the compressed file is still too big.

What happens when a file is too large

If you attach a file larger than your email provider's limit, one of three things happens. Most commonly, the email fails to send and you get an error message when ready or within a few minutes. Sometimes the email appears to send, but the recipient never receives it — they may not tell you, so you think the transfer worked when it did not. Occasionally, the email sits in your outbox for hours before failing.

The safest approach is to check the file size before you send. Right-click the file on your computer, select "Properties" (Windows) or "Get Info" (Mac), and look for the file size. If it is larger than 20 megabytes, use a cloud link or file-transfer service instead of attaching it.

Choosing the right method for your situation

Use a cloud storage link (Google Drive, OneDrive, Dropbox) if you are sending to someone you trust and you might need to share the file again later. The file stays in your account, you can update it, and you can revoke access anytime. This works well for work documents, shared projects, and files you send to the same person regularly.

Use a file-transfer service (WeTransfer, Tresorit, Sync.com) if you are sending a one-time file to someone who may not have a cloud account, or if you want the file to disappear automatically after a few days. This works well for large photos from an event, a video you recorded, or a file you do not want stored anywhere permanently.

Compress the file first if it is close to the email limit but not drastically over it. Compression takes 30 seconds and might solve the problem without requiring a new tool or account.

File formats and what the recipient can open

Before you send a large file, make sure the recipient can actually open it. A video file in MOV format (common on Mac) may not play on a Windows computer without extra software. A design file in Adobe InDesign format (.indd) requires InDesign to open — a recipient with only Photoshop cannot use it.

If you are unsure, ask the recipient what format they need, or convert the file to a more universal format before sending. Video files can be converted to MP4 (plays almost everywhere). Photos can be sent as JPG or PNG (universal). Documents can be sent as PDF (universal) or as Word (.docx), which most people have.

Conversion tools are free online — search "convert [your file type] to [target type]" and you will find services like CloudConvert or Zamzar that handle the conversion in your browser. Upload your file, select the output format, and read the converted version.

Frequently Asked Questions

Can I send a file larger than 2 gigabytes?

Yes, but not through email or free file-transfer services. Google Drive, OneDrive, and Dropbox all support files larger than 2 gigabytes if you have a paid account. Paid versions of WeTransfer and Tresorit also handle larger files. For extremely large files (over 10 gigabytes), ask your IT department or the recipient if they have a preferred method, because some organizations use specialized tools.

Is it safe to send files through Google Drive or Dropbox?

Yes, these services encrypt files in transit (while they travel to the server) and at rest (while stored). The main risk is sharing the link with the wrong person — anyone with the link can access the file unless you set a password or restrict it to specific email addresses. Always double-check the recipient's email address before you share.

What if the recipient says they never got the file?

Check your email provider's sent folder to see if the message was actually sent. If it shows as sent but the recipient did not receive it, the file was probably too large and bounced silently. Resend using a cloud link or file-transfer service instead. If you sent a link and they still cannot access it, ask them to check their spam folder or try a different browser.

Do I need to pay for WeTransfer or Google Drive?

No. WeTransfer is free for files up to 2 gigabytes. Google Drive is free with a Google account and includes 15 gigabytes of storage shared across Gmail, Photos, and Drive. OneDrive is free with a Microsoft account and includes 5 gigabytes. You only pay if you need more storage or larger file limits.

Can I send a password-protected file through email?

You can create a password-protected ZIP file on your computer (Windows and Mac both have built-in tools), attach it to email if it is small enough, and send the password separately. But for large files, it is easier to use a file-transfer service that has password protection built in — WeTransfer, Tresorit, and Sync.com all offer this.