Give your visitors a working email checker without building one. Paste the snippet below into any page, and they can check whether an address is real and see the answer in seconds. No account and no script on your site.
Live preview
Paste this where you want the checker to appear: a WordPress Custom HTML block, a Webflow or Squarespace embed, or straight into your HTML.
<iframe src="https://bouncezero.io/embed/email-checker/" title="Email checker" width="100%" height="120" style="border:0;max-width:560px;" loading="lazy"></iframe> <p style="font-size:12px;margin:4px 0 0;">Email checker by <a href="https://bouncezero.io/free-email-verifier">BounceZero</a></p>
The widget is 120 pixels tall and fills the width you give it, up to 560 pixels. Please keep the credit line under it: it is how we keep the checker free.
Marketing and sales blogs
Next to an article on cold email or list hygiene, readers can test an address while they read.
Tool and resource pages
A working checker is more useful than a link to one, and it keeps visitors on your page.
Course and help content
Teaching email deliverability? Let students check real examples in place.
Need more than single checks? The free email verifier shows the full breakdown, and a free account adds bulk lists and the API with 100 credits every month.
Yes. There is no account, no API key and no charge. Each visitor gets a limited number of free checks, and the shared free service is capped overall, so at very busy moments a visitor may be asked to try again a minute later.
It loads in an iframe with loading="lazy", so the browser only fetches it when it scrolls into view, and it cannot block your own page from rendering. There is no script to add to your site.
The same pipeline as our free checker: syntax, the domain and its mail records, a live mailbox check where the provider allows it, and disposable and role-address detection. The visitor sees a valid or invalid verdict and a score out of 100.
Addresses are processed to return the result, under the same terms as every BounceZero check, set out in our privacy policy. The widget runs inside its own frame, so it sets no cookies on your domain.
The widget is for single addresses. For lists, bulk upload, or results inside your own form, use the API with a free account, which includes 100 credits every month.