Free tool · Nothing leaves your browser
Find the words that
smell like spam
Paste your cold email and watch the filter-bait light up in place — false urgency, money talk, overpromises and the phrases filters learned from real scams.
Checked in your browser as you type — your copy never touches our servers.
Paste your email on the left — the verdict, category breakdown and in-place highlights appear here instantly.
The honest truth about spam filters
Reputation outweighs words 10 to 1
A trusted sender can write 'FREE MONEY!!!' and land in the inbox; a burned domain can't deliver a dinner invitation. Words are the part you can fix in five minutes — reputation is the part you protect for months.
Humans are the filter that matters
Every 'report spam' click teaches Gmail about you. Salesy language doesn't just trip regex — it makes real people angry, and angry people click report. Past roughly 0.3% complaint rate, you're done.
Density beats presence
One 'free' in 200 words is nothing. Five urgency phrases in three sentences is a pattern. That's why this tool scores trigger density, not just a count.
Links and images count too
Cold emails with 3+ links or image-heavy signatures convert worse and filter harder. One link, placed after the value, is the sweet spot.
Questions, answered honestly
Do spam words actually trigger spam filters in 2026?
Far less than the folklore says. Gmail and Microsoft weigh sender reputation, authentication and how recipients engage with your mail much more heavily than word lists. But trigger phrases still matter for two honest reasons: they correlate with the campaigns filters punish, and they make human readers hit 'report spam' — which is the signal that really buries you.
My email scored clean. Will it land in the inbox?
Clean copy is necessary, not sufficient. If your domain isn't authenticated (SPF, DKIM, DMARC), your mailbox isn't warmed up, or your list is full of dead addresses, the cleanest copy in the world still goes to spam. Run the domain health check next — that's the half of deliverability copy can't fix.
Which categories of words does it check?
Four: false urgency ('act now', 'last chance'), money talk ('100% free', 'lowest price'), overpromising ('guaranteed results', 'risk-free') and shady patterns filters learned from actual scams ('not spam', 'no credit check'). Each highlight tells you the category so you know why it tripped.
Is my email copy uploaded anywhere?
No. The scan runs entirely in your browser as you type — your draft never reaches our servers. Short drafts are kept in the page URL so you can share a link with a teammate; long ones aren't stored anywhere at all.
What should I write instead of the flagged phrases?
The specific version of the same idea. 'Act now' becomes 'we have two onboarding slots in March'. 'Guaranteed results' becomes 'Acme cut reporting time 40% in 6 weeks'. Specificity is the one rewrite that fixes both the filter problem and the human problem.
Keep going
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Clean copy, meet protected reputation.
Norbelys watches the signals that actually decide inbox placement — bounces, complaints, engagement by real humans — and slows down or pauses sending before damage is done.
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