Em-dash Page Analyzer

Em-dash Page Analyzer scans the main content of any webpage and measures how often the em-dash character (—, Unicode U+2014) is used. The extension extracts the article body, counts characters, words, sentences, and em-dashes, then calculates ratios such as em-dashes per sentence, per 1,000 words, and the percentage of sentences containing at least one em-dash.

Why does this matter? Em-dashes are often overused in automatically generated text. Popular AI writing tools such as ChatGPT, and others sometimes produce unusual punctuation patterns compared with human authors. This extension provides a simple heuristic that may flag text as “AI-like” if em-dash usage exceeds configurable thresholds. It is not proof, but it gives an extra signal for style analysis.

Key Features

🔍 Analyze the main body of any webpage with one click
📊 Detect and count the em-dash (—) character only
📝 Report characters, words, sentences, and em-dash counts
📐 Show ratios: per sentence, per 1,000 words, and percent of sentences with em-dash
🚨 Flag possible AI-generated content if thresholds are exceeded
🔒 Local analysis only — no server calls, no data collection
⚡ Works through the toolbar popup or right-click context menu

Use Cases

✍️ Writers and editors tracking punctuation style
🧪 Researchers studying text generation patterns
👀 Readers curious about whether an article may have been written with AI tools
📈 Content analysts monitoring writing quality on websites and blogs

Disclaimer
This extension provides descriptive statistics only. High em-dash frequency may suggest AI-generated writing but cannot confirm authorship. Always treat results as one indicator among many.