Paste an email subject and body to see which words and habits may push it into the spam folder. Trigger phrases are highlighted by category, and caps, exclamation marks, links and the subject line are scored into a 0-100 risk estimate with tips to fix each problem.
Last updated:
Advertisement
Advertisement
How to use the Spam Word Checker
Paste your subject line into the first field.
Paste the email body as plain text or HTML source.
Read the risk score and the highlighted phrases.
Follow the tips to rewrite risky words, capitals and links.
Check again until the score is low, then send a test to your own inbox.
Spam trigger categories
Category
Examples
Points each
Better wording
Suspicious
verify your account, claim your prize, dear friend, click here
5
Address the reader by name and describe the link: "See your order details"
Overpromise
100% guaranteed, miracle, no strings attached, you won't believe
4
Give a concrete benefit: "Cuts report time from 2 hours to 20 minutes"
Urgency
act now, last chance, urgent, today only
3
"The early-bird price ends on Friday, June 5"
Money
earn extra cash, double your money, lowest price
3
Talk about savings in context: "Save about $40 a year on hosting"
Free & offers
free gift, special offer, giveaway, % off
2
"Included with your plan", "members get 20% off"
Formatting
!!!, ???, $$
2
Plain punctuation
Beyond words: what really affects deliverability
Authentication: publish SPF and DKIM records and a DMARC policy for your sending domain.
Permission: only email people who opted in, and make unsubscribing easy with a visible link.
Reputation: send consistently, remove bounced addresses and keep complaint rates very low.
Balance: include real text, not just one large image, and keep the HTML clean.
Identity: use a recognizable sender name and a physical mailing address, as required by CAN-SPAM for commercial email in the US.
Frequently asked questions
What are spam trigger words?
They are words and phrases that appear often in unwanted or fraudulent email, such as "act now", "100% guaranteed" or "claim your prize". Filters look at them together with many other signals, so a single word rarely sends an email to spam, but a cluster of them makes it more likely.
How is the spam risk score calculated?
It adds points for trigger phrases (weighted by category, with subject-line hits counted twice, up to 45), capital letters above 10% of letters, ALL-CAPS words, exclamation marks, subject problems, many links, link shorteners, image-heavy HTML and many prices. The total is capped at 100. It is a heuristic estimate, not the output of any real email provider's filter.
Will removing spam words guarantee inbox delivery?
No. Modern filters such as those of Gmail and Outlook weigh sender reputation, authentication (SPF, DKIM, DMARC), engagement and complaint rates more heavily than wording. Clean copy helps, but sending only to people who asked for your email matters most.
Is the word "free" really a problem?
Used once in a natural sentence it is usually fine. It becomes a signal when combined with capitals, exclamation marks and other offer language, as in "FREE!!! Claim your free gift now". The checker flags it so you can decide.
Why do capital letters and exclamation marks matter?
Shouting in capitals and stacking exclamation marks are typical of low-quality bulk mail, and they also annoy readers. Keep capitals for normal sentence case and acronyms, and use at most one exclamation mark.
Is my email content uploaded?
No. The text and HTML are analyzed entirely in your browser. Nothing is stored or sent anywhere.
Why are link shorteners flagged?
Shortened links hide the real destination, which spammers and phishers exploit, so many filters treat them with suspicion. Use full links on your own domain instead.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.