Email Tone Fingerprinter
Analyze the tone and style patterns in emails. Useful for checking if a suspicious email matches someone's usual communication style.
Paste Email to Analyze
Paste an email (without headers) to analyze its tone, formality, and style characteristics.
Common AI Email "Tells"
AI-like patterns:
- • "I hope this email finds you well"
- • Overly formal when casual is expected
- • Perfect grammar in casual contexts
- • Generic, templated closings
- • No typos or corrections
Human-like patterns:
- • Personal references and inside jokes
- • Inconsistent punctuation
- • Casual abbreviations (lmk, btw, fyi)
- • Typos and autocorrect errors
- • Trailing off with "..." or "!"
How This Tool Works 100% Client-Side
Your data never leaves your device. All processing happens locally in your browser. No text is sent to any server, no data is stored, and no cookies track your usage.
Email tone is analyzed by detecting greeting and closing styles, measuring contraction rates, counting punctuation patterns, and matching against known AI-typical phrases. A formality score (0-100) and AI-indicator score are calculated based on weighted pattern matching.
- Scans for 20+ common AI-generated phrases like 'hope this finds you well'
- Detects human markers: abbreviations (lmk, btw), exclamations, casual language
- Analyzes pronoun usage (I, you, we) for personal vs. impersonal tone
- All email content stays in your browser - nothing is transmitted
How to verify this yourself
Check your browser's Network tab to see nothing is sent:
- Open DevTools: Right-click anywhere on the page → "Inspect" (or press F12)
- Go to Network tab: Click "Network" at the top of the DevTools panel
- Use the tool: Type or paste text and watch the Network tab
- Verify: You'll see no requests to external servers — all processing is local
Works in Chrome, Firefox, Safari, and Edge.