EmailSubjectScore Pro — Write Subject Lines That Get Opened

Write subject lines that get opened, not ignored. Spam risk, clarity & open-rate scored live in Gmail. AI rewrites in one click.

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/