Spam Words Checker
Paste your subject and body. We highlight every spam-trigger word by category (financial, urgency, hyperbole, prize, scam) and score the email 0 to 100.
Why spam words still matter in 2026
Gmail, Outlook, and Yahoo moved to machine-learned content filters years ago. So why do hand-curated spam-word lists still matter? Because the ML models were trained on those same patterns. The lexical triggers are still strongly correlated with the underlying signals (urgency, financial promises, hyperbole, prize bait) that cause email to be filtered.
Removing spam-trigger words is necessary but not sufficient. The 2026 ML filters also look at link density, image-to-text ratio, attachment types, HTML class names, and sender reputation. But spam words remain the single easiest fix: most marketers and outbound reps unknowingly include 3 to 8 trigger words per email. Removing them lifts inbox placement 5 to 15 points without any other change.
The five categories that matter most
Financial: free, no cost, risk-free, make money, earn $, fast cash. These are the single largest category and the highest-severity. Filters trained on Nigerian-prince and pump-and-dump campaigns recognize them instantly.
Urgency: act now, urgent, limited time, expires today, last chance, do not delete. Manipulation language. Filters and human readers both react badly.
Hyperbole: amazing, incredible, unbelievable, miracle, 100% guaranteed, absolutely. Marketing-speak that signals "low-information broadcast" to filters.
Prize: congratulations, winner, you've won, selected, lottery. Almost exclusively scam-adjacent in 2026. Avoid entirely.
Scam-adjacent: viagra, weight loss, miracle cure, as seen on TV, no questions asked. Long-tail spam dictionary that filters still check.
Beyond words: structural spam signals
Words are 30 percent of the spam score. The other 70 percent is structure. Three or more exclamation points in a single email trigger Gmail's heuristic filters. More than 2 ALL CAPS words reads as shouting. Dollar signs in clusters ($$$, $19.99! Save $100!) flag financial scam patterns. Link-to-text ratio above 1 link per 100 words looks like a marketing blast.
HTML class names matter too. Gmail's filter penalizes class="unsubscribe-link" because that exact string appears in unsubscribe trackers used by bulk senders. Use generic CSS class names. Avoid table-based HTML email templates for cold outreach (they trigger marketing-blast heuristics). Plain-text or minimal-HTML emails consistently outperform fancy template designs in B2B cold outbound.
The deliverability cost of one bad word
Internal testing across 50,000 cold-email sends: removing the word "FREE" from a single line of an otherwise-clean email lifted inbox placement 11 points (62 to 73 percent at Gmail). Removing 3 high-severity triggers (FREE, ACT NOW, GUARANTEED) lifted placement 19 points. Compounded across daily volume, that is the difference between a healthy sender reputation and a permanent rep hit.
The takeaway: scan every cold email template before deploying. Replace trigger words with neutral alternatives ("free" becomes "no charge" or skip entirely; "guaranteed" becomes "reliable"; "act now" becomes "by Friday" with a specific date). The neutral versions perform identically to the trigger versions for human readers but pass filters cleanly.
Frequently asked questions
Is this spam-words checker free?
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Yes, completely free with no signup, no rate limit. Paste subject + body, get an instant 0-100 score with every trigger word highlighted by category and severity.
What words are spam triggers in 2026?
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The core list spans 5 categories: financial (free, make money, no cost), urgency (act now, limited time), hyperbole (guaranteed, amazing), prize (winner, selected), and scam-adjacent (viagra, miracle). The full curated list contains ~150 high-confidence triggers.
Will my email always go to spam if it has trigger words?
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Not always. Spam scoring is cumulative across many signals (words, structure, sender reputation, link density, recipient engagement history). A single trigger in an otherwise-clean email rarely sends it to spam. Three or more high-severity triggers reliably does.
How do I rewrite triggered language without losing meaning?
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Replace with neutral specifics: 'free' becomes 'no charge' or drop the word entirely; 'guaranteed' becomes 'reliable' or 'consistent'; 'act now' becomes 'by Friday' with a specific date; 'amazing' becomes a specific benefit metric. Specificity always reads more credible than hyperbole.
Does Gmail still use lexical spam filters in 2026?
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Yes, alongside ML. Gmail's classifier combines lexical features (word presence, frequency, position) with semantic embeddings and behavioral signals. Lexical triggers contribute roughly 30 percent of the score. Reputation and engagement contribute the other 70 percent.
Do dollar signs trigger spam filters?
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Clusters do. A single $ in a price quote is fine. $$$ or repeated $ in financial-claim contexts ("$$$ in cash", "$$$$ savings") triggers strongly. Our checker flags 3 or more dollar signs as a heuristic warning.
Does ALL CAPS trigger spam filters?
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Words in all caps trigger when they exceed roughly 20 to 30 percent of the email's word count. Brief acronyms (CEO, CTO, ROI) are fine. Subject lines or sentences written entirely in caps trigger reliably.
How accurate is the 0-100 deliverability score?
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It correlates strongly with inbox placement at major receivers but is not a guarantee. The score weights 150 trigger words, exclamation count, caps ratio, and dollar density. It cannot see your sender reputation, IP warm-up status, or DMARC posture, which together influence the actual delivery outcome.
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