Fill in your webinar details and get a polished, event-style invite email — with copy-paste HTML that works in Gmail, Outlook and Apple Mail.
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WebinarOS builds these pages, sequences and reminders automatically — on top of Zoom, Teams & Meet.
The generator handles layout and email-client quirks. The words are still yours, and they decide whether someone registers. Four things move that number more than design does.
"Join our product webinar" describes the format, not the reason to attend. Name the problem and the result: "How we cut webinar no-shows from 70% to 45% in six weeks." Specific promises out-register broad themes because the reader can tell instantly whether it applies to them. Put that promise in the subject line and repeat it as the first line of the body — many people read only the preview pane.
Ambiguous timing is a silent killer of attendance. Always state the time zone explicitly, and say the day of the week as well as the date ("Thursday, March 14"). Attach a calendar file to the confirmation email — a calendar entry raises show rates on its own, because your session then competes for that slot instead of being forgotten.
An invite with a register button, a "learn more" link, a PDF download and a social follow splits attention four ways. Keep exactly one destination: the registration page. Repeat the same button once near the bottom for people who scroll, but do not introduce a second, competing action.
Outlook renders email with a Word engine that ignores much of modern CSS. The output from this tool uses table-based layout and inline styles for that reason. If you edit it afterwards, avoid flexbox, grid, background images carrying essential text, and web fonts — and always send yourself a test before the real send.
Fill in the fields on the left and the preview updates as you type. Set an eyebrow (usually your company or host name), the webinar title, a one-sentence detail, the date and time with its time zone label, and your registration URL. Choose whether to overlay text on the header image — "off" is the safer choice, because several clients block images by default. When the preview looks right, copy the HTML and paste it into your email platform, or open a test message to check it in your own inbox first.
A great invite still lands in spam if the sending domain is not ready. Verify SPF, DKIM and DMARC on the domain you send from, warm any new domain over two to four weeks rather than jumping straight to full volume, suppress hard bounces immediately, and keep complaint rates below 0.1%. If open rates on a previously healthy list drop under about 20%, treat that as a deliverability problem before rewriting the copy. Our guide on why webinar invites land in spam covers the full 30-day fix, and the invitation cadence guide explains how many follow-up touches to send and when.
This tool is free, runs entirely in your browser, and does not store anything you type. Nothing you enter is sent to WebinarOS.