Free Spam Word Checker

Catch spam words before the filters do

Spam filters score every email, and certain words push that score up fast. A subject line stuffed with "free", "guaranteed" and "act now" can sink an otherwise great cold email straight into the junk folder.

This free spam word checker scans your copy against a curated list of common trigger words and phrases, highlights each one, and rates your overall risk — so you can fix problems before you hit send.

Words are only half of deliverability

Clean copy keeps you out of spam, but it won't save you if you're emailing invalid addresses or sending from an unauthenticated domain.

Verify every recipient with Emailchaser's free email verifier to cut your bounce rate and protect your sender reputation — the biggest levers on whether you reach the inbox.

The main categories of email spam trigger words

Trigger words cluster into a few recognizable families, and learning the families is faster than memorizing a list. The big four are money and income claims (big bucks, fast cash, double your income, pure profit), free-and-discount hooks (100% free, free gift, lowest price, save big), false urgency (act now, urgent, offer expires, while supplies last), and over-the-top guarantees (guaranteed, risk-free, satisfaction guaranteed, miracle).

Two subtler families do the most damage in cold email. Words that protest innocence — "this is not spam", "no catch", "no obligation", "click to remove" — read as guilty to a filter precisely because honest senders rarely need them. And prize or winner language such as "you're a winner", "congratulations you won" and "you have been selected" is an almost automatic flag, because it mirrors the exact structure of lottery and phishing scams. The checker above highlights and counts every hit, so once you can recognise these families it's quick to see which one your copy leans on and cut it.

Where spam words hurt most: subject line vs body

A trigger word in the subject line carries far more weight than the same word buried in the third paragraph. The subject is the first thing both the filter and the human see, so hype words like "free", "guaranteed" or "act now" there are a strong junk signal — and in Gmail a promotional-sounding subject is also more likely to be diverted to the Promotions tab, which for cold outreach is nearly as costly as landing in spam. Your preview text (the preheader) counts too, since inbox clients render it right beside the subject. Keep the subject and first line completely clean even if you leave a stray trigger word deeper in the body.

How to rewrite copy the checker flags

Work the flagged words one at a time instead of deleting them wholesale. For each highlight, ask what real thing you were trying to say and state it plainly: "guaranteed results" becomes a specific outcome you can point to, "100% free" becomes "no cost to you" only if that is genuinely true, and "act now" becomes a concrete, low-pressure ask. The goal isn't a lower word count — it's copy that sounds like one person writing to another.

As a worked example, take the line "Act now — claim your 100% free, risk-free trial and start to make money with guaranteed results." The checker flags five triggers and rates it high risk. Rewritten as "I saw [Company] just expanded into [market] — we helped [similar company] handle that same shift without adding headcount. Worth a 10-minute call next week?" it flags zero, reads like a human, and gives the recipient something specific to react to. If the subject line is where you keep tripping the filter, Emailchaser's cold email subject line generator is built to avoid these triggers from the start.

Do spam trigger words still matter? How modern filters decide

Yes, but less than they did a decade ago, and never on their own. Gmail, Outlook and Yahoo abandoned simple word lists years ago; they score senders with machine-learning models that weigh authentication (SPF, DKIM and DMARC alignment), your domain and IP reputation, and — most heavily — engagement, meaning how often real recipients open, reply, star or delete-without-reading your mail. A single "free" in a well-authenticated email from a sender people actually answer will sail through. The same word from a cold domain with no DMARC and a history of complaints is just one more reason to filter it.

That's why this checker is a hygiene step, not a deliverability guarantee. Trigger words matter at the margin: when a filter is already unsure about you, spammy copy is the tiebreaker that tips you into spam — and it's the one input you can fix instantly, for free, before a single send. But if your open and reply rates are healthy and your domain is properly authenticated, scrubbing a couple of borderline words won't transform a campaign. It simply removes an easy excuse for the filter to doubt you.