Check your email's size
Paste the HTML of an email and see how close it is to the point where Gmail cuts it off, what is taking up the space, and what to trim first. It runs in your browser.
Write emails that fit
When Email Digit writes an email for you, it checks the size against Gmail's clipping point before it hands you the draft, so the footer and unsubscribe link stay visible.
Why Gmail cuts long emails
Gmail clips any message whose HTML is larger than about 102 KB. The figure counts bytes of the HTML source, not the images it links to, so a long email with a few photos can be fine while a short one built by a heavy template tool is clipped.
Where the bytes usually go
Repeated inline styles on every table cell, indentation, comments left by the editor, and images pasted in as base64. All four can be trimmed without changing how the email looks. Outlook conditional comments are the exception: they look like comments but Outlook needs them.
Email size questions
What happens when Gmail clips an email?
Gmail shows the first part and a 'View entire message' link. Everything after the cut is hidden, which usually includes your footer and unsubscribe link, and any tracking pixel placed at the bottom.
Do images count toward the limit?
Linked images don't: the inbox fetches them separately. An image embedded in the HTML as base64 text does count, byte for byte, which is why the checker calls those out first.
Why warn before 102 KB?
The HTML you paste is not quite what gets delivered. Link tracking makes every URL longer, and the unsubscribe footer and filled-in merge fields add more. An email measured at 95 KB can arrive over the line.
Is my HTML sent anywhere?
No. The check runs in your browser. Only if you ask us to email you the result do we store your address and a one-line summary of the size.