Few things are more annoying than getting ready to send an important file only to realize Gmail won’t let it go through. Now you’re stuck troubleshooting when you should be moving on with your day.
Gmail’s size limit isn’t a dead end, though. In this guide, we’ll explain Gmail’s attachment limit, what happens when you go over it, and how to send large files more smoothly.
What is the Gmail attachment size limit?
For most people, the Gmail file size limit caps attachments at 25 MB per email. This limit applies to everything you attach, not just a single file.
If you’re on a Google Workspace account, your limit depends on your plan and what your admin has configured. Most Workspace users have the same 25 MB cap, but Enterprise Plus accounts can send attachments up to 50 MB.
What happens when you exceed the limit?
If your attachment is too big, Gmail automatically uploads the file to Google Drive and inserts the shareable link into your email. This is fine for everyday files, but if you’re sharing something sensitive like contracts or personal documents, you may want more control over where your files end up.
Most of the time, this process works without you having to do anything. However, if you’re on an older version of the Gmail app, using a mobile browser, or your Google storage is full, the upload can fail. Gmail also blocks certain file types entirely, such as .exe files, so they won’t make it through regardless of size. Luckily, there are a few other approaches to rely on.
How to send large files via email
Here are some reliable options for sending large files over email.
Compress your files
If you’re sending a batch of documents for review or a folder of images from an event, zipping them into one file keeps things organized and can reduce overall size. ZIP is the most widely supported compressed file format and works across Windows, Mac, and most mobile devices.
To create a ZIP file, select the files or folders, then:
Windows: Right-click → Compress to… → ZIP file
Mac: Control-click → Compress
It’s a simple process that doesn’t require third-party tools, but it has its limits. A 200 MB video isn’t going to shrink to 25 MB, and already-compressed formats like JPEG or MP4 will barely shrink. And if you’re sharing design files or photos, some compression tools or formats can reduce quality.
Strengths:
- Works offline and without third-party tools
- Multiple files and folders can be packed into a single .zip file
- .zip files can be password-protected using third-party tools
Keep in mind:
- You could waste time compressing large files, only to still hit the Gmail attachment limit
- Compression can potentially degrade quality, which matters in some industries
- Unzipping files isn’t easy on mobile
- The privacy of your .zip files is limited by the security model of your email provider
Use a file transfer service
File transfer services are fast and commitment-free; you don’t need to create an account, and your files are auto-deleted after a set window. Free tiers can be generous as well, such as SwissTransfer’s 50 GB.
That said, convenience comes with tradeoffs. Free tiers often lack secure sharing features, and you typically can’t revoke access or see who downloaded your file, which are especially important in business settings.
Security also varies by provider. Many services encrypt files, but because they hold the encryption keys, they can technically access your data. Without end-to-end encryption, files may also be exposed in a server breach or corporate hack. WeTransfer, for example, operates this way and isn’t HIPAA-compliant as a result, making it a poor choice for businesses in healthcare.
For casual, non-sensitive sharing, file transfer services are fine. But if you work in a regulated industry or need to keep files private, limited access controls and oversight can create compliance and security risks. A breach of the provider’s systems could expose your sensitive data, potentially leading to fines, legal liability, or reputational damage.
Even for personal files, privacy varies widely between services. Some providers can access the files you upload and may use that data for purposes such as ad targeting or AI training.
Strengths:
- No account required for most services
- Quick and simple for occasional transfers
- Generous size limits, even on free tiers
Keep in mind:
- Limited control and oversight after sending, so you can’t track or revoke access
- Provider-controlled encryption means your files may still be exposed in a server breach or unauthorized access incident
- Features like password protection are often paywalled, leaving free users with fewer safeguards
Use cloud storage
Cloud storage makes sending large files easy — upload your file, generate a link, and paste it into your email.
This method makes the most sense for ongoing access, such as when sharing an assets folder with a client, or a photo album with family. There are no file size restrictions beyond your storage quota, and recipients can preview files without downloading anything.
Google Drive is the default for Gmail users since it’s already integrated, but its 15 GB of space is shared across Gmail, Drive, and Photos, so it fills up faster than you’d expect. However, there are plenty of cloud storage options available — including business cloud storage providers. Depending on your storage needs and privacy requirements, you can easily find a Google Drive alternative that better suits you.
Cloud storage providers handle privacy and security differently. Some major platforms can access the files you upload, while others use zero-knowledge encryption so only you and the people you share files with can access them. Sharing controls and security features, such as password protection, also vary between providers.
For businesses handling regulated data, choosing a provider that doesn’t meet compliance requirements under frameworks such as HIPAA or GDPR can create legal and reputational risks.
Strengths:
- End-to-end encryption and advanced sharing controls from some providers
- No file size restrictions within your storage quota on some services
- Easy to update files and folders — edit the original, and the link stays current
Keep in mind:
- Privacy and security vary greatly between providers
- Free tiers tend to come with low storage, requiring constant management
- Misconfigured sharing permissions can accidentally expose sensitive files to unintended recipients
- Using a provider that isn’t compliant with industry regulations, such as HIPAA or GDPR, can expose businesses to legal and reputational risks
Securely send large files via email with Proton Drive
When Gmail blocks your attachment, Proton Drive lets you upload the file, create a secure sharing link, and send it by email without compromise — no size or format restrictions, no compression, and no hoping the recipient can figure out how to unzip a folder on their phone.
If privacy and control matter to you, whether you’re sharing personal photos or sending sensitive business files, most solutions fall short.
Proton Drive is built differently — all your files are protected with end-to-end encryption, meaning only you and the people you share with can access them, not even Proton has access.
You can password-protect links, set expiry dates, track downloads, and revoke access at any time. And because Proton is based in Switzerland, your data is protected by some of the world’s strictest privacy laws.
For businesses, Proton Drive can help support compliance with regulations like HIPAA and GDPR. For everyone else, it’s simply a more private way to share files online. You can get started with 5 GB of storage for free and send large files via email without worrying about limits.
