Free Tool
Spam Word Checker
Paste your subject line and email body to scan for the words and phrases that trip spam filters before you hit send.
Spam word checker, explained
What does this tool actually check for?
It scans your subject line and email body for more than 800 spam words and phrases from three published lists (Instantly, ActiveCampaign and Warmup Inbox), grouped into Urgency, Shady, Overpromise, Money and Salesy. Everyday words such as “get”, “new” or “now” are normal English on their own, so they only count once three or more show up together. The whole list, by category, is in our Ultimate Spam Words List.
Why do our emails land in spam even with no flagged words?
Copy is only one factor. Missing SPF/DKIM/DMARC authentication, a damaged sender reputation, a sudden spike in send volume, bad or unverified addresses on your list, and a heavy image-to-text ratio all matter more than any single word choice — this is the kind of infrastructure work our team handles for clients.
How do we fix a flagged email?
Rephrase the flagged words into plainer language, cut the aggressive urgency framing, and read the email back as if a stranger sent it to you cold — if it reads like a template, spam filters and prospects both notice.
Does this work for cold outreach specifically, or any email?
Cold outreach is what it's built for, but the same word list applies to newsletters, follow-ups, and any other email you're sending at volume.
Is it free, and is our email content stored anywhere?
Free, no sign-up. Everything runs in your browser — nothing you type is sent to a server or saved.
Is the word list kept up to date?
Last updated October 2026 from the same three published lists our Ultimate Spam Words List merges. If you're seeing a word flagged (or missed) that shouldn't be, let us know.
Want this handled for you?
We build cold email infrastructure and AI outbound systems for B2B companies and agencies. If this tool raised more questions than it answered, let's talk.