Emailsubjectscore Pro — S

Every cold email, sales outreach, and important message lives or dies by its subject line. EmailSubjectScore Pro is a free Chrome extension that scores your Gmail subject lines in real time as you type — rating spam risk, clarity, and urgency on clear scales. When your score needs work, one click generates AI-powered rewrite suggestions that beat your original. Stop guessing and start sending subjects that get opened.

### How it works

1. Open Gmail and click Compose
2. Type your subject line — scores appear automatically after a brief pause
3. See three color-coded ratings: Spam (0-100), Clarity (0-10), Urgency (0-10)
4. Click "Suggest rewrite" for 3 AI-generated alternatives
5. Click "Use this" to replace your subject instantly, or copy to clipboard
6. Send with confidence

### Features

- Real-time subject line scoring inside Gmail compose — no tab switching
- Three-axis scoring: Spam risk, Clarity, and Urgency
- AI-powered rewrite suggestions that improve on your original scores
- Color-coded score badges (green/yellow/red) for instant feedback
- Works with Gmail light and dark mode
- 50 free scores per month (10 per day) — no signup required
- Lightweight: under 60KB, no slowdown
- Privacy-first: subject text is processed ephemerally, never stored

### What we DON'T do

- We never read your emails — only the subject line you type
- We never track opens, clicks, or recipients
- We never store your subject lines on our servers
- We never sell your data
- No account required for the free tier

### Why not Boomerang / Mailtrack / ChatGPT for Gmail?

- Boomerang Respondable scores subjects but costs $15/mo and doesn't suggest rewrites
- Mailtrack tracks opens but doesn't score subjects at all
- ChatGPT for Gmail generates text but doesn't score against a structured rubric
- EmailSubjectScore Pro does both — score AND rewrite — free to start (50 scores/month)

### Built for cold emailers, sales reps, and founders

If you send important outbound emails from Gmail — sales outreach, recruiting, fundraising, freelance pitches — your subject line is the gate. EmailSubjectScore Pro is the quality check before you hit Send.

### From an indie developer
EmailSubjectScore Pro is built by a solo developer who sends cold emails too. No bloated sales suite, no enterprise pricing, no feature creep. One job: score your subject line and help you improve it.

Questions or feedback? Shoot me a support request .