Free tool · runs in your browser
Email Spam Checker
Paste a subject line and message to see which common content problems it contains, such as shouting, link shorteners and a missing unsubscribe line.
How it works
What it does
We run a fixed set of rules over the subject and body, including capital letters, exclamation marks, URL shorteners, numeric-IP links, links whose visible address differs from the destination, image-only HTML, phrases common in bulk promotions and the lack of unsubscribe wording. Each finding says what matched and what to change.
Limits
What it cannot tell you
- This is not a spam score and it cannot predict inbox placement. Mailbox providers do not publish their filters, and delivery also depends on your domain authentication, sending reputation and list quality.
- The rules are ours and cover a small set of common problems. A message with no findings can still be filtered.
- The unsubscribe note is a reminder, not legal advice. Check the rules that apply to your sending.
- Up to 200,000 characters. Runs in your browser; nothing you paste is sent anywhere.
FAQ