Free tool
Cold email spam checker
Paste your email and get an instant deliverability score — the exact words and formatting hurting your inbox placement. Free, private, no signup.
100% client-side — nothing you paste leaves your browser.
Paste a subject + body to score its deliverability.
Spam checker FAQ
Is this spam checker free?+
Yes — completely free, no signup, and 100% client-side (nothing you paste leaves your browser).
What does the score mean?+
It's a heuristic deliverability score (0–100) based on spam trigger words, links, formatting, length and personalisation — the signals that tip a borderline cold email into spam. 80+ is clean.
Does a clean score guarantee inbox placement?+
No. Copy is only half of it — sender reputation, SPF/DKIM/DMARC, warmup and bounce rate matter more. Autocloz automates those mechanics.
Free to start
Clean copy is step one. We handle the rest.
Warmup, DMARC/DKIM/SPF, one-click unsubscribe and bounce auto-pause — built in, so your mail actually lands.