Email Subject Line Scorer
Paste your subject line and get an instant 0–100 score based on length, spam signals, urgency, emojis, and formatting — plus concrete tips to boost your open rate.
0 characters
Runs entirely in your browser. Nothing is uploaded or stored.
How it works
STEP 1
Paste your subject
Type or paste the email subject line you want to grade into the input field.
STEP 2
Score it instantly
The scorer checks 7 heuristics — length, spam words, urgency, emojis, ALL-CAPS and more — and calculates a 0-100 grade.
STEP 3
Follow the fix tips
Each deduction comes with a concrete suggestion so you know exactly what to improve.