EmailSubjectScore Pro — Email Spam Risk & Subject Line Scorer for Gmail

Score spam risk, clarity & open rate for every email subject line in Gmail. AI rewrite suggestions in one click. No data sent.

Every cold email, sales outreach, and important message lives or dies by its subject line. EmailSubjectScore Pro is a free email subject line checker that scores your subjects in real time inside Gmail — 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 subject lines that get opened. ✨ How it works 1. Open Gmail and click Compose 2. Type your subject line — scores appear automatically as you type 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 6. Send with confidence 📋 Features - Real-time email subject line tester inside Gmail compose — no tab switching - Three-axis scoring: Spam risk, Clarity, and Urgency - AI-powered subject line 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 — no signup required - Lightweight: under 60KB, no slowdown - Privacy-first: subject text processed ephemerally, never stored 🔴 What we DON'T do - Never read your emails — only the subject line you type - Never track opens, clicks, or recipients - Never store your subject lines on our servers - Never sell your data - No account required for the free tier ⚡ Why EmailSubjectScore Pro instead of other tools? - Most subject line tools are web-based — you have to leave Gmail, copy your subject, paste it, read the result, come back. That breaks your flow every single time. - Boomerang Respondable scores subjects but costs $15/mo and doesn't suggest rewrites — you're paying for a full scheduling suite to get one feature. - AI writing tools generate text but don't score against a structured spam/clarity/urgency rubric — they can't tell you WHY a subject line is weak. - EmailSubjectScore Pro does both — score AND rewrite — inside Gmail, free to start. 💡 How is this different from web-based subject line testers? EmailSubjectScore Pro works inside Gmail — no copy-pasting to external tools like CoSchedule or SubjectLine.com. Unlike web-based analyzers, you never leave your inbox. Score + rewrite in one place, zero workflow interruption. 🎯 Built for cold emailers, sales reps, and founders If you send important outbound emails from Gmail — sales outreach, recruiting, fundraising, freelance pitches, newsletter campaigns — your subject line is the gate. EmailSubjectScore Pro is the quality check before you hit Send. ❓ Frequently asked questions Q: Is EmailSubjectScore Pro free? A: Yes. 50 subject line scores per month, completely free, no signup required. No credit card. No trial expiration. Q: How is the subject line score calculated? A: We analyze three dimensions — spam trigger words, clarity of intent, and urgency signals — using AI trained on email deliverability data. Each dimension gets a clear score so you know exactly what to fix. Q: Does this extension read my emails? A: No. EmailSubjectScore Pro only reads the subject line you type in the compose window. It never accesses your inbox, contacts, or email body. Q: What is the best email subject line checker for Gmail? A: EmailSubjectScore Pro is built specifically for Gmail — it scores subject lines in real time as you type, with AI rewrite suggestions. No copy-pasting to external websites or switching tabs. Q: Does it work with Google Workspace? A: Yes. EmailSubjectScore Pro works with both free Gmail and paid Google Workspace accounts. ℹ️ About EmailSubjectScore Pro is built by Amrita Labs — focused tools for email productivity. No bloated sales suite, no enterprise pricing, no feature creep. One job: score your subject line and help you improve it. Questions or feedback? hello@amrita-labs.com Website: https://amrita-labs.com/gmail-subject-score/