Trust beats tactics™

Signatures

Email Signature Analyzer

Every email you send carries the same signature. If it is heavy, image-only, link-stuffed, or built with CSS your inbox provider strips, the cost compounds across every send. Paste yours; we grade it across five categories and flag what needs to change.

New to signature design? Read Best practices for email signatures in the Email Almanac.

Parsing happens server-side. We do not store the input beyond the request.

How this tool works

What the analyzer measures

  1. 1

    HTML weight

    Total size, inline style count, nested table count and div nesting depth. Heavy signatures attach themselves to every send and add up.

  2. 2

    Images

    Image count, missing alt text, missing width or height, base64 inlining and text-to-image ratio. Image stuffing is the most common signature smell.

  3. 3

    Links

    Total link count, shortened URLs, javascript: links, non-HTTPS targets and link-text vs href mismatch, a phishing pattern.

  4. 4

    Content

    Word count, spam trigger phrases and legal disclaimer detection. A 200-word disclaimer on every email is real bandwidth.

  5. 5

    Technical

    Table vs div layout, <style> tags, web fonts, unsupported CSS, script tags and background images. Anything an email client strips or breaks.

Five categories, 100 points

  • HTML weight25
  • Images25
  • Links20
  • Content15
  • Technical15

When to use it

Reach for it in these moments

  • Your sales team is about to roll out a new signature

    Paste the proposed HTML before the rollout, not after. You have one chance to set the baseline weight.

  • Inbox placement dropped after a brand refresh

    The new signature is the variable. Run it through and compare against the prior version.

  • You inherited a signature template

    Find out whether it carries unsupported CSS, web fonts or base64 images before you adopt it across the company.

Email Almanac

  • Not sure what this means?

    Ask a real person. The Email SOS Hotline is free help with any email problem, no pitch.

    Ask the Email SOS Hotline

  • Keep this result

    Send it to your inbox, to share with your team or compare after a fix.

    Run a check, then email it

  • Your email is ready. Is your list?

    Mailbox providers judge you on who you send to, as well as what you send. Clean your first 1,000 addresses free.

    Clean your first 1,000 free