Question 1

What does an HTML email linter check for?

Accepted Answer

A purpose-built HTML email linter checks for unclosed and mismatched tags, broken table nesting, missing alt attributes on images, missing role="presentation" on layout tables, and Outlook-specific bugs like div inside td or unsupported CSS.

Question 2

How is this different from a regular HTML validator?

Accepted Answer

A regular HTML validator enforces HTML5 spec compliance — useful for websites, mostly irrelevant for email. Email clients use 1999-era rendering engines and break on patterns modern browsers accept.

Question 3

Will fixing the errors guarantee my email renders perfectly?

Accepted Answer

It eliminates the most common rendering bugs. For a true render guarantee, also use the dark-mode tester, Outlook generators, and send a real test.

Question 4

Can I beautify the code while validating?

Accepted Answer

Yes. The Beautify & Validate button runs both steps in sequence: format the code into clean indentation, then run the validator on the cleaned version.

Question 5

Does the linter handle Outlook VML and conditional comments?

Accepted Answer

Yes. Conditional comments and VML blocks are recognized and excluded from standard tag-pair validation.

Question 6

Is my HTML code uploaded to a server when I lint it?

Accepted Answer

Never. The linter runs 100% in your browser. Your code never leaves your device.

Find broken tags before Outlook does.

Find broken tags before Outlook does.