Free HTML check

Free HTML email tools

Paste a template. Each tool checks one thing people look up before a send. The check runs in the browser.

• Email template testerPaste the HTML. This checker tells you what will go wrong before you send: size, preheader, unsubscribe, links, and alt text.
• Gmail clipping checkerPaste the HTML. If it is over 102,000 bytes, Gmail hides the rest of the message behind “View entire message”.
• Email preheader checkerThe grey line after the subject. Paste the HTML, or type the subject and preheader if you do not have the file yet.
• Unsubscribe link checkerPaste the HTML. A word in the footer is not enough. The link has to go somewhere, or the file has to carry your ESP’s tag.