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 src> 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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