Email Spam Word Checker
Paste your email copy below and instantly see which words and phrases could trigger spam filters. Every match is color-coded by severity, with safer alternatives you can swap in right away.
No signup required. Runs entirely in your browser. Your email text is never sent to any server.
Include your subject line, preheader, and body text. The more text you provide, the more accurate the analysis.
Spam Risk Analysis
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Your email copy is clean
No spam trigger words were detected. Your word choices should not cause deliverability issues from a content perspective. Keep in mind that sender reputation, authentication, and list quality also affect inbox placement.
Found Triggers
Each trigger word is listed with its severity level and a safer alternative. Consider swapping these to reduce spam risk.
| Trigger Word | Severity | Safer Alternative |
|---|
Your Email with Highlights
Trigger words are highlighted in your original text. Hover over a highlight to see the severity level and suggested replacement.
How the Spam Word Checker Works
Paste your copy
Drop in your subject line, preheader text, and email body. The checker analyzes every word and phrase against our database of over 500 known spam triggers.
Review the results
Each trigger is classified as Critical, Warning, or Caution. You get an overall risk score, a detailed breakdown table, and your email text with every trigger highlighted in context.
Swap and resend
Use the suggested alternatives to replace risky words, then paste your revised copy and check again. Aim for a score above 85 before sending your campaign.
Why Spam Trigger Words Matter
Every email you send passes through multiple layers of spam filtering before reaching the inbox. Content-based filtering -- where the actual words in your email are scanned -- is one of the oldest and most persistent layers. While modern filters like Gmail's use hundreds of signals (sender reputation, engagement history, authentication), the words in your copy still matter.
A single "click here" or "act now" will not get you flagged. But stack up several trigger words in one email, combine them with aggressive punctuation (!!!), ALL CAPS formatting, or a low sender reputation, and you have a recipe for the spam folder.
The practical fix is straightforward: write like a professional communicating with a colleague, not like a late-night infomercial. Our checker makes that easy by flagging the specific words and phrases that carry risk, so you can make targeted swaps without rewriting from scratch.
Spam Word Checker FAQ
What are spam trigger words in email marketing?
Spam trigger words are specific words and phrases that email spam filters have learned to associate with unsolicited or deceptive messages. When your email contains too many of these words, inbox providers like Gmail, Outlook, and Yahoo may route your message to the spam or junk folder instead of the primary inbox. Common examples include phrases like "free money," "act now," "click here," and "guaranteed." The more trigger words your email contains, the higher the likelihood of deliverability problems.
How does the spam word checker work?
Our checker scans your email text against a database of over 500 known spam trigger words, organized into three severity levels: Critical (words almost certain to trigger filters), Warning (words that raise red flags when combined with other signals), and Caution (words that are fine alone but problematic in high concentration). The tool matches words using boundary detection to avoid false positives -- for example, "free" will not falsely match "freedom." Each found trigger is highlighted in context and paired with a safer alternative you can use instead.
Will removing all spam trigger words guarantee inbox delivery?
No. Spam trigger words are only one of many signals that inbox providers evaluate. Your sender reputation, domain authentication (SPF, DKIM, DMARC), sending volume history, engagement rates, list hygiene, and email infrastructure all play significant roles. That said, cleaning up trigger words is one of the easiest and most immediate improvements you can make. Think of it as removing low-hanging fruit -- it will not fix a broken sender reputation, but it eliminates one common reason emails get flagged.
What is the difference between Critical, Warning, and Caution severity levels?
Critical words are those most strongly associated with spam and phishing emails. Even one or two in your copy can raise a red flag. Warning words are suspicious in context -- they might be fine in isolation, but combined with other triggers or aggressive formatting, they increase your spam score. Caution words are common in legitimate marketing but should be used sparingly. A few caution-level words are normal; a dozen or more suggests your copy may be leaning too heavily on promotional language.
How many spam trigger words are too many in one email?
There is no universal threshold because every inbox provider uses different algorithms. As a general guideline, aim for zero critical-level triggers, no more than two or three warning-level triggers, and keep caution-level words to under five percent of your total word count. If our tool gives you a score below 70, your email has meaningful spam risk and should be rewritten. A score above 85 means your copy is clean and unlikely to trigger word-based filters.
Keep Improving Your Emails
The spam checker is one piece of the deliverability puzzle. Use our other free tools to optimize every aspect of your email campaigns.