html.cloud vs emailing an .html file
Attaching an .html file to an email is the obvious move — and the one most likely to fail
quietly. Mail providers treat HTML attachments as a phishing risk and often block or flag
them, anything sizeable bounces on the attachment limit, and whatever gets through lives in inboxes and
backups forever with no expiry. html.cloud sends a private, encrypted link
instead — it opens as a page, and you can expire, replace, or delete it.
Why the attachment quietly fails
Because an HTML file can carry scripts, it's a textbook phishing vector, so Gmail and Outlook
routinely strip .html attachments, drop them in spam, or slap a warning on them before
the recipient can open — and none of that gives you a bounce message, so you often don't know
it happened. If the file dodges the filters, it may still hit the ~25 MB attachment ceiling once it has
embedded images or data. And the copy that does arrive is now permanent: it's in their inbox, your sent
folder, and every backup, readable by anyone with mailbox access, with no way to pull it back or expire
it. A link has none of those failure modes — html.cloud gives you one that opens the page directly,
encrypted so only the people you send it to can read it.
At a glance
| html.cloud | .html email attachment | |
|---|---|---|
| Delivery | A link that opens the page in the browser | A file the recipient must download and open |
| Deliverability | A normal link — nothing to strip | Often blocked, quarantined, or flagged as risky |
| Size limit | Up to 10 MB via the link | Bounces past ~25 MB on most providers |
| Privacy | Encrypted in your browser; key only in the link | Sits readable in inboxes, sent folders & backups |
| Expiry & revocation | 7 / 30 days / never; delete anytime | None — once sent, it's out of your hands |
| Updating it | Replace behind the same link | Send a whole new email |
When emailing the file is genuinely fine
This isn't always the wrong choice. If the file is small, non-sensitive, and one-off — and you know the recipient's provider won't strip it and you don't care that it lives in their inbox forever — attaching it is simple and needs no third-party service at all. html.cloud earns its place the moment any of that stops being true: the file is confidential, it needs to render correctly when opened, it's too big to attach, or it might change after you send it. Then a link you control beats a file you've let go of.
FAQ
Why do HTML email attachments get blocked or flagged?
HTML files can contain scripts, so providers like Gmail and Outlook treat .html
attachments as a phishing risk — stripping, quarantining, or warning before download. A link avoids
that, and an html.cloud link opens the page directly in the browser.
Is there a size limit on email attachments?
Yes — Gmail caps attachments around 25 MB and others are similar, so a larger HTML file with embedded images bounces or gets auto-converted to a link. html.cloud delivers via a link from the start, up to 10 MB per file.
Can I expire or update a file after emailing it?
No — a sent attachment sits in inboxes and backups with no expiry or revocation, and changing it means a new email. With html.cloud you can expire it, delete it, or replace the file behind the same link so the recipient always sees the latest version.