Free Tool
Email spam word checker
Paste your subject line and email body below. We scan both against a list of spam trigger words and phrases pulled from multiple deliverability sources, flag risky formatting, and give you a plain-English risk score, all in your browser. Nothing you type is sent anywhere.
What score should you target?
The score weighs your copy the way real content filters do: severe scam-associated phrases count far more than everyday sales language, repeating one word matters less than stacking different trigger phrases, and hype packed into your subject line or a short passage is riskier than the same words spread through longer copy. Word choice is only one input, though. Authentication, sender reputation, and list health matter even more, and this tool cannot see them.
How this checker works, and why you can trust the number
Major providers use machine learning (ML), not word lists
Gmail and Outlook decide where your email lands with ML systems built on thousands of signals: your domain's sending reputation, its authentication records, and how recipients react, including opens, replies, and "report spam" clicks. The authentication records they check are SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting and Conformance). There is no fixed list of banned words at that layer, and any tool claiming a word score predicts inbox placement is overselling.
So why check words at all?
Two reasons. A lot of business mail still passes through content filters (SpamAssassin and similar, common at company mail servers) that genuinely do score words and patterns. And spammy language pushes human readers to delete or report your email, and complaint rate is one of the strongest signals the ML filters watch. Word choice is the piece of deliverability you can fix in five minutes.
Our hybrid scoring approach
Instead of counting "bad words," this tool scores copy the way real content filters weigh it. Scam-associated phrases count far more than everyday sales language. Repeating one word counts less than stacking different trigger phrases. Hype in your subject line, or packed into a single passage, costs more than the same words spread through longer copy. And no amount of extra length can water down a genuinely spammy phrase.
Where the word list comes from
We merged the published spam-trigger lists of nine independent deliverability and email-marketing sources, including Mailchimp, Twilio SendGrid, ActiveCampaign, Campaign Monitor, Mailjet, GlockApps, and an open-source dataset. Every term was then reviewed one by one: outdated folklore was cut, and each surviving term was tiered by severity. Last reviewed July 2026.
Your email never leaves this page
Everything runs in your browser. Nothing you paste is stored, sent, or read by anyone. Check as many drafts as you want.
Words are only part of deliverability
This checker sees your copy. It cannot see your SPF, DKIM, and DMARC records, sender reputation, list health, or where your mail actually lands. Our email deliverability tuneup reviews all of it and hands you a prioritized fix list in plain English.
Ask about a tuneup