Email Size Checker
Check your HTML email size against Gmail's 102KB clipping limit. Get live stats and a visual breakdown as you type.
Tips for Reducing Email Size
Minimize HTML markup
Remove unnecessary divs, comments, and whitespace. Avoid deeply nested table structures. Use shorthand CSS properties (e.g. padding: 10px instead of setting each side separately). Every byte counts when you are near the 102KB limit.
Use hosted images
Never embed images as base64 data URIs in email HTML — they inflate the message size dramatically. Instead, host images on a CDN and reference them with img tags. Image file size does not count toward the 102KB limit since images are loaded separately.
Gmail clipping explained
When an email's HTML exceeds 102KB, Gmail truncates the message and shows a "[Message clipped] View entire message" link. This hides your call-to-action, unsubscribe link, and tracking pixels — hurting engagement and potentially violating anti-spam laws. Keeping emails under 90KB provides a comfortable safety margin.
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