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Cold Email Spam Word Checker.

A spam word checker scans your email subject line and body against a database of 200+ known trigger words that cause spam filters to flag or block your message. This free tool highlights every matched phrase with color-coded severity categories, scores your email from 0 to 100 with a letter grade from A to F, and suggests safe alternative wording for each flagged trigger. Subject line matches are weighted 2x because inbox providers scrutinize subjects more heavily than body content. Use it before every send to identify exactly which words are hurting your deliverability and fix them in seconds.

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How to Use

Get Started in 3 Steps

Step 01

Enter Your Email Content

Type or paste your email subject line and body text into the input fields. The tool scans both separately since subject line triggers carry 2x weight with spam filters.

Step 02

Review Highlighted Matches

Click "Check for Spam Words" to see flagged trigger phrases highlighted in the preview panel with color-coded categories. Each match shows its severity level and category.

Step 03

Replace Flagged Phrases

Use the suggested safe alternatives for each flagged phrase to rewrite your email. Focus on high-severity subject line matches first for the biggest score improvement, then re-check.

How It Works

Under the Hood

When you submit your email content, the tool normalizes the text (lowercasing and collapsing whitespace) and scans against a database of 200+ known spam trigger words and phrases. Matching uses a longest-match-first algorithm to prevent overlaps — for example, "limited time offer" is matched as one phrase rather than separately matching "limited time" and "offer."

Each match is scored based on severity (high = 3 pts, medium = 2 pts, low = 1 pt) with a 2x multiplier for subject line matches. The base score is augmented by three penalty factors: word density (how concentrated the triggers are), ALL-CAPS usage, and excessive punctuation. All penalties are capped to prevent any single factor from dominating the score.

The final score is capped at 100 and mapped to a letter grade from A (excellent, 0-15) through F (critical, 71-100). The category breakdown shows which types of triggers appear most — urgency, money, pressure, shady, overpromise, or jargon — so you can identify patterns in your writing style that may need adjustment.

All processing runs entirely in your browser. No email content is sent to any server, stored, or logged. You can safely paste confidential outreach copy without privacy concerns.

FAQ

Frequently Asked Questions

What are spam trigger words and why do they affect email deliverability?
Spam trigger words are specific words and phrases that email spam filters use as signals to flag incoming messages. When your email contains multiple triggers like "act now," "free gift," or "guaranteed," spam filters assign penalty points that increase the likelihood of your message landing in the spam folder instead of the inbox. Modern spam filters use hundreds of signals, but word-level analysis remains a core component — especially for cold outbound email where sender reputation is still being established. Our checker scans against 200+ known triggers across 6 categories: urgency, money, pressure, shady, overpromise, and jargon.
How does the spam word scoring formula work?
The score combines four factors. First, a base score sums severity points for each matched trigger (high = 3 pts, medium = 2 pts, low = 1 pt), with subject line matches weighted 2x since subject triggers have more impact on spam filters. Second, a density penalty measures how many triggers appear relative to total word count — a short email packed with triggers scores higher. Third, an ALL-CAPS penalty flags excessive capitalization. Fourth, an excessive punctuation penalty catches patterns like "!!!" or "???" that spam filters watch for. The raw total is capped at 100, and mapped to letter grades: A (0-15), B (16-30), C (31-50), D (51-70), F (71-100).
Why are subject line matches weighted more heavily than body matches?
Email spam filters give disproportionate weight to subject line content because the subject is the first thing both filters and recipients see. A subject like "ACT NOW - FREE GIFT" is a much stronger spam signal than the same words buried in a long email body. Our checker applies a 2x multiplier to subject line matches to reflect this reality. In practice, this means a single high-severity trigger in the subject (6 weighted points) contributes more to your score than three low-severity triggers in the body (3 points). For cold outbound, keeping your subject line completely free of triggers is often more important than cleaning up the body.
What is the difference between high, medium, and low severity spam words?
High severity words (3 points each) are classic spam indicators that almost always trigger filters — phrases like "act now," "guaranteed," "click here," and "you have been selected." Medium severity words (2 points) are contextually problematic — they might be fine in some emails but raise flags in cold outreach, including "free," "discount," "urgent," and "subscribe now." Low severity words (1 point) are mild triggers that only contribute to a problem when combined with other signals — words like "bonus," "exclusive," "deadline," and "free trial." The severity levels help you prioritize which words to replace first.
How can I reduce my spam word score without changing my message?
Focus on replacing the highest-severity matches first, since each high-severity trigger contributes 3-6 points depending on location. Our checker provides safe alternatives for every flagged phrase — for example, replacing "click here" with "learn more," or "guaranteed results" with "proven results." Also check your subject line first since matches there carry 2x weight. Beyond word replacement, reduce ALL-CAPS usage (write "Important Update" instead of "IMPORTANT UPDATE") and avoid excessive punctuation marks. Often, rewording a single high-severity phrase in the subject line can drop your score by an entire letter grade.
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