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Email subject line tester

Score your subject lines for open rate potential before hitting send. Get instant feedback and optimize every campaign.

Need inspiration? Try our AI subject line generator. Create with AI

Subject lines you'll want to steal

Looking for inspiration for your next email campaign? Try these high-scoring subject lines for promotional and automated emails to give your campaigns the best chance of success.

Suggested subject lines
Our score
Don't miss out our BOGO sale!
92% our score
Copy Copied
Black Sale. New arrivals 30% off!
100% our score
Copy Copied
💥 25% Black Friday Code: FRIDAY
92% our score
Copy Copied
Black Friday is back!🔥 Shop now!
92% our score
Copy Copied
🚨 BLACK SALE! Bestsellers 45% off!
92% our score
Copy Copied
Your 50% off gift is waiting
100% our score
Copy Copied
Breaking: 40% off ending at midnight!
100% our score
Copy Copied
Order Now for Delivery by Christmas!
92% our score
Copy Copied
Ending soon: last-minute delivery
92% our score
Copy Copied
[Product] back in stock this Saturday!
92% our score
Copy Copied
Treat your Valentine with 50% off
100% our score
Copy Copied
50% Off Valentine's Coupon Expires Soon
100% our score
Copy Copied
[Product] is much better than chocolate
92% our score
Copy Copied
Be Our Valentine (& Get Free Shipping)
83% our score
Copy Copied
Gifts for an epic solo Valentine's
83% our score
Copy Copied
Mother’s Day 30% Off Sale
92% our score
Copy Copied
A Gift for Mom (& You)!
92% our score
Copy Copied
Reminder: Mothers Love [Your Product]!
92% our score
Copy Copied
Celebrate Mother’s Day with us!
92% our score
Copy Copied
3 Mother’s Day Gifts She'll Love
92% our score
Copy Copied
Father's Day weekend special: 25% off
100% our score
Copy Copied
Give something special this Father's Day
92% our score
Copy Copied
3 Father’s Day Gift Ideas
92% our score
Copy Copied
Father’s Day Gifts Under $50
92% our score
Copy Copied
A gift for Dad (plus 20% off)
92% our score
Copy Copied
The Perfect 4th of July Weekend
100% our score
Copy Copied
Independence Day Special Weekend Sale
92% our score
Copy Copied
Go 4th in Red, White, & New Shoes
92% our score
Copy Copied
Shop our 4th of July sale
92% our score
Copy Copied
Ending Soon: 30% Off Independence Day Sale
83% our score
Copy Copied
Still shopping? (Take 20% off)
100% our score
Copy Copied
Your items are selling quickly
92% our score
Copy Copied
Your cart is waiting (and lonely)
92% our score
Copy Copied
Did you forget something?
92% our score
Copy Copied
Complete your order now
92% our score
Copy Copied
Welcome! (Important info inside)
92% our score
Copy Copied
Welcome! Enjoy 20% off
92% our score
Copy Copied
Thanks for subscribing! (psst, open me)
83% our score
Copy Copied
You're one of us now!
92% our score
Copy Copied
Welcome info & your free gift
92% our score
Copy Copied
We miss you! Have £10 on us
92% our score
Copy Copied
We miss you, [Name]
83% our score
Copy Copied
Did you miss these new products?
92% our score
Copy Copied
Would you like a 20% discount?
100% our score
Copy Copied
Treat yourself. You deserve it.
92% our score
Copy Copied
🎁 Don't miss our holiday sale
83% our score
Copy Copied
Hurry, up to 80% off!
100% our score
Copy Copied
🎄Christmas sale is now on ✨
92% our score
Copy Copied
There's still time to save!
92% our score
Copy Copied
Today only, 50% off site wide!
100% our score
Copy Copied
New product arrivals in stock
92% our score
Copy Copied
New year, new goodies!
92% our score
Copy Copied
The new winter collection is live!
92% our score
Copy Copied
Autumn's on the way – see what’s new
83% our score
Copy Copied
Don't miss the new collection
92% our score
Copy Copied
Expires at Midnight – Exclusive Offer!
92% our score
Copy Copied
LAST DAY - up to 70% Off
83% our score
Copy Copied
End of summer BLOW OUT!
83% our score
Copy Copied
Hurry: last minute free delivery
92% our score
Copy Copied
Only 2 days left! 50% off!
92% our score
Copy Copied
Cyber Monday Restock - Buy NOW
92% our score
Copy Copied
Cyber Monday Flash Sale 30% off
92% our score
Copy Copied
💻 Cyber Monday Sale—Styles from $29
92% our score
Copy Copied
FINAL HOURS: Get 25% off for Cyber Monday!
83% our score
Copy Copied
Cyber Monday: Get up to 80% OFF
92% our score
Copy Copied
Get Thanksgiving Essentials with 20% off
100% our score
Copy Copied
Happy Thanksgiving! 💕 Save 30% OFF!
92% our score
Copy Copied
💥60% OFF [bestseller]💥THANKSGIVING DAY SPECIAL ONLY💥
92% our score
Copy Copied
Limited time sale is happening now!
92% our score
Copy Copied
Stock up for Thanksgiving. 20% OFF
100% our score
Copy Copied
Tomorrow Only: Giving Tuesday Sale
92% our score
Copy Copied
Hurry! Giving Tuesday Sale Ends Soon
92% our score
Copy Copied
New deals for Giving Tuesday!
92% our score
Copy Copied
Get involved this Giving Tuesday!
92% our score
Copy Copied
Give back on Giving Tuesday!
83% our score
Copy Copied
More subject lines suggestions

How to use the subject line tester

You’ll find the subject line tester at the top of this page. Results appear on this page instantly, scoring your subject line from 0 to 100%.

Follow these steps to use the subject line tester:

  • Add your subject line to the Enter your subject line field
  • Click Test now
  • Scroll or swipe to see these results:
    • Your score
    • Length ratings
    • Wording feedback
    • Scannability
  • Finally, check the subject line preview to ensure it looks good

Test your subject lines as many times as you like and follow the tips the tool recommends to keep improving your scores.

Why test your subject lines?

35%

of recipients open emails based solely on the subject line. A great subject line makes or breaks whether your email even gets opened.

69%

of recipients mark an email as spam based on the subject line. Having too many emails marked as spam affects overall deliverability and sender reputation.

59%

of recipients say marketing emails influence their purchases. Without attention-grabbing subject lines, your revenue-generating emails are less likely to get opened.

Optimize your marketing further
with additional tools

We’ve prepped a few extra tools to help you get more from your marketing:

CREATE

Product description generator

Easily create product descriptions for all your items. A short prompt is all it takes to get high-quality, engaging copy you can use right away.

Use this tool
CREATE

Email generator

This tool writes automated and promotional emails for you. Select your email type, tone, length, and emoji preference to receive professional copy back.

Use this tool
PREDICT

SMS length calculator

Is adding SMS to your marketing cost-effective? Test your message length and sending costs with this calculator to find out.

Use this tool
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