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emailtestr

Free tool

Gmail clipping checker

Gmail cuts off emails with more than 102KB of HTML, and hides the rest, usually including your unsubscribe link. Paste your HTML to check.

Your HTML stays in your browser. Nothing is uploaded or saved.

Result

Paste some HTML to check its size.

Gmail clips emails over 102KB of HTML. We warn from 90KB, to leave room for tracking links.

Check everything else too

EmailTestr runs this check on every test, along with broken links and images, alt text and dark mode, and shows the email in Apple Mail on iPhone and Mac.

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How this checker works

It measures the size of your HTML in bytes, the way Gmail does, and compares it with the 102KB limit. It also estimates how much a quick minify would save, and how much your email platform's click-tracking links might add: each tracked link is typically around 100 bytes longer than the original.

Images hosted on a server don't count towards the limit. Images embedded straight into the HTML as data: do. For the full explanation and how to cut an email down, read why Gmail clips your email, and how to stay under 102KB.