HTML Email Size Checker
Paste HTML email code or copied message content to check byte size, Gmail clipping risk, script or form usage, image count, and cleanup steps.
Start Here
Enter the email content and run HTML Email Size Checker.
Review the HTML Size Checker Result
Review the status, warnings, and recommended actions shown in the result panel.
Ready When You Are
Run HTML Email Size Checker to see the HTML Size Checker result and next actions.
About HTML Email Size Checker
HTML email size matters because some inboxes clip large messages, especially Gmail. When clipping happens, subscribers may miss the unsubscribe link, tracking may become less reliable, and the email can feel broken. The HTML email size checker estimates HTML size, text weight, image/link density, and common structure risks. Use Email Headers and Message Format to understand how message structure affects delivery.
A smaller email is usually easier to read and safer to test. Large inline styles, copied page HTML, too many sections, and heavy markup can all create avoidable problems. The HTML email size checker points out where the email may need trimming before you send. Pair the result with Design for Phones First and Write the Email Body so the final message is compact and clear.
What HTML Email Size Checker Checks
- Approximate HTML size in KB
- Gmail clipping risk
- Script and form tags that email clients commonly block
- Image and link counts
- Base64 image bloat
- Simple cleanup guidance
Questions
What is Gmail clipping?
Gmail may hide part of a large email behind a clipped message link. Clipping can hide important content, tracking, and unsubscribe links.
Does this render the email like every inbox?
No. The checker reviews size and common risky HTML patterns. Always send a real test email to check rendering.