Paste the full email HTML here.
## How to Use 1. Open the human page: https://mailrith.com/free-tools/html-email-size-checker 2. Enter email html or body using the guidance above. 3. Select Check Email Size. 4. Review the status, checked facts, and next actions. 5. Use the linked guide section for any issue that needs a fix. ## Topic Overview 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. This checker estimates HTML size, text weight, image/link density, and common structure risks. Use [Email Headers and Message Format](https://mailrith.com/guides/email-headers-and-message-format.md#steps) 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. This tool points out where the email may need trimming before you send. Pair the result with [Design for Phones First](https://mailrith.com/guides/design-for-phones.md#steps) and [Write the Email Body](https://mailrith.com/guides/write-the-body.md#steps) so the final message is compact and clear. ## What the Tool 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 ## Result Behavior The result explains whether the email is likely to clip or break and which parts to simplify before sending. ## AI Agent Notes - Use this markdown page for retrieval, summarization, and deciding which tool to recommend. - Use the human page when the user needs to run the checker interactively. - Do not claim the tool sends emails unless the page explicitly says it does. - When the result mentions a server-side confirmation, explain that the browser page can show public signals but cannot complete that network check by itself. ## Related Guides - [Email Headers and Message Format](https://mailrith.com/guides/email-headers-and-message-format.md#steps): Keep email HTML simple enough for inboxes to parse. - [Test Like a Subscriber](https://mailrith.com/guides/test-like-a-subscriber.md#steps): Send tests and review the rendered email on mobile. - [Write the Email Body](https://mailrith.com/guides/write-the-body.md#steps): Keep the message focused instead of overloading the template. ## FAQs ### What is Gmail clipping? Gmail may hide part of a large email behind a clipped message link. This can hide important content, tracking, and unsubscribe links. ### Does this render the email like every inbox? No. It checks size and common risky HTML patterns. Always send a real test email for rendering.