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Email HTML checker

Paste the HTML of an email. This reads it in your browser and reports the text-to-HTML ratio, the number of images and links, and tracking pixels, with a note on each that could hurt delivery. Nothing is sent anywhere.

Free, no signupIn your browser
Email HTML checkerRuns in your browser

Text-to-HTML ratio, images, links, tracking pixels and inline styling: the things that make a 1:1 email read like a newsletter.

Paste HTML to check it.
How it works

What this checks, and how.

  1. Your HTML is parsed in the browser with the DOM parser. Nothing leaves the page.
  2. We measure how much of the markup is visible text, count images and links, and look for one-pixel tracking images.
  3. Each check shows as a pass, a note or a fix, with a line of detail.
Questions

Quick answers.

Is my HTML sent to a server?

No. It is parsed in your browser.

What is a good text-to-HTML ratio?

There is no single official number. Mostly-image emails and emails with very little text relative to markup are more likely to look like bulk mail, so the checker flags low ratios.

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