Question 1

What is a bulletproof button in HTML email?

Accepted Answer

A bulletproof button is an email CTA that renders identically across every email client, including Microsoft Outlook for Windows. It wraps the CTA in VML <v:roundrect> code so Outlook reads it as a vector shape, while every other client uses the regular CSS path.

Question 2

How does this html email button generator work?

Accepted Answer

You set text, URL, colors, dimensions, and corner radius, and the generator emits a single block of HTML containing both the modern CSS path and the VML fallback. Outlook clients use the VML; everyone else uses the CSS.

Question 3

Do bulletproof email buttons work in Gmail and Apple Mail?

Accepted Answer

Yes. The VML block is wrapped in conditional comments that only Outlook reads. Every other client falls through to the standard anchor tag with inline CSS.

Question 4

Why not just use a normal HTML button or image button?

Accepted Answer

Normal button elements are ignored by most clients, and image buttons fail when images are blocked. Bulletproof email buttons using VML are the only text-based option that renders identically across clients.

Question 5

Can I add background images to bulletproof buttons?

Accepted Answer

Yes. The generator supports VML <v:fill type="tile"> for buttons with tiled background images — useful for textured CTAs and simple gradient effects.

Question 6

Are these bulletproof email buttons accessible?

Accepted Answer

Yes. The output is plain text inside a real anchor tag, so screen readers announce the link and the button text is selectable. The VML version is hidden from accessibility tools by default.

Make a bulletproof button that survives every version of Outlook.

Make a bulletproof button that survives every version of Outlook.