Free tool · No signup
Cold email spam checker
Paste your email, get an instant 0–100 spam score with the exact trigger phrases flagged. Runs in your browser — nothing is uploaded, nothing is stored.
Checked instantly in your browser — your email never leaves this page.
Why spam-check before sending?
Since Gmail and Yahoo tightened bulk-sender rules, roughly one in six legitimate emails never reaches an inbox. Content triggers are the part you control on every single send: spammy phrasing, all-caps subjects, exclamation stacks, and heavy link density all push your message toward the spam folder before a human ever sees it.
This checker scores the same content signals ReachOS applies to its own users' outreach: trigger-phrase detection, caps and punctuation abuse, link density, and image-to-text ratio. It won't see your DNS setup or sender reputation — those need authenticated checks — but it catches the mistakes that sink most cold email.