Email subject line generator
Subject lines that get the email opened
Tell it what the email is about and pick the campaign. You get subject lines with matching preview text, each checked for length, phone cut-off and spam-filter words. It all runs in this browser.
Free, no sign-up, nothing you type leaves this browser.
Subject lines
6 lines for winter coats
Score90Strong
- 48 characters, inside a desktop inbox line
- A phone cuts the last 8 characters
- Preview text of 70 characters adds to the subject
- No spam-filter words
- No words in capitals
- Calm punctuation
- No merge tag. Add the first name to test a personal line
- At most one emoji
Edit this line
Campaign
Short fits a phone line (up to 35 characters). Long uses the desktop line (up to 60).
Saved
Lines you save appear here, ready to copy into your email tool. They stay in this browser.
6 subject lines. The first is: The winter coats you saved are on sale this week
How lines are scored
What the score checks, and why it matters
The inbox shows a sender, a subject and a line of preview text, and a reader decides in that glance. Every line is checked against the same rules, worked out in this browser.
Desktop inbox, 60Back in stock: the ceramic mugs you asked us about last…
Phone inbox, 40Back in stock: the ceramic mugs you…
Length per inbox
A desktop list shows about 60 characters of a subject and a phone about 40. Put the words that matter first so the cut never takes them.
Preview text that adds
The preview is the second line. If you leave it empty the inbox shows the email's first words, often a "View in browser" link. Use it to add a reason, not to repeat the subject.
- ACT NOW: you won free coats!!!60
- Winter coats, lower prices this week100
Spam-filter words
Phrases like "act now" or "you won", words in capitals and stacked !!! make filters and readers suspicious. The check names each one it finds.
{first_name}, your cart is savedMaya, your cart is savedTheo, your cart is savedthere, your cart is savedMerge tags
A first-name tag makes the line personal. Your email tool swaps it in when it sends, so set a fallback for contacts with no name on file.
Every campaign
A line for each email a store sends
Each card is a line the generator writes for an example store, shown the way an inbox would show it.
- Alder OuterwearOur winter coats sale ends at midnight tonightAfter midnight the prices go back up. Sizes are running low in the best colors.9:41Score 90 · 46 characters
- Bank alertsYour statement is readyView your October statement online.8:12
Sale
Say what is on sale and until when. A price or a deadline in the first 40 characters works hardest.
- Maison LuneHow we made the linen collection, from sketch to shelfThe story behind the design, the materials we picked and what we changed.9:41Score 90 · 54 characters
- Lena ParkFriday dinner?Are you still free at 7? I booked the table.Yesterday
Launch
Name the new thing plainly. Launch lines read best when they promise a first look, not a discount.
- Kiln and CoStill deciding on the leather tote? Read what buyers sayReviews from people who bought the same pieces, plus our notes on fit.9:41Score 90 · 56 characters
- Parcel updatesYour parcel is out for deliveryIt should arrive before 6 pm today.7:58
Abandoned cart
Name the product left behind. Reminders work best within a day, and the second one can carry an offer.
- Fernline BotanicsWe miss youIt has been a while. Here is what is new in skincare since your last visit.9:41Score 90 · 11 characters
- Book clubNext month's pick is inWe meet on the 14th at the usual place.Tue
Win back
Speak to a customer who has gone quiet. Show what changed since they last bought, then the gift.
- Harbor PotteryOnly a small batch of the ceramic mugs came backWe restocked fewer than last time. When they are gone, they are gone.9:41Score 90 · 48 characters
- City libraryTwo books are due on FridayRenew them online in one tap.Mon
Back in stock
Lead with "back in stock" and the product. People who waited open these first.
- Northbound CoffeeThe full schedule for the spring pop-up is now upTalks, demos and tastings by the hour, so you can plan your visit.9:41Score 90 · 49 characters
- Sam OrtizPhotos from the weekendHere are the ones from the lake.Sun
Event
Give the name and when. The preview text carries the place and how to join.
How to use it
From topic to tested line in four steps
Topic
- winter coats
- Offer
- 20% off
- First name
- Off
Describe the email
Type what the email is about in a few words, such as winter coats or the spring pop-up, and add an offer if there is one.
Campaign
- Goal
- Sale
- Tone
- Urgent
- Length
- Short
Pick the campaign
Choose the goal (sale, launch, newsletter, abandoned cart, win back, event, back in stock or welcome), a tone and how long the line may be.
Score
- Desktop
- Fits
- Phone
- Fits
- Spam words
- None
Read the scores
Each line comes with preview text and a score out of 100 for inbox length, phone cut-off, spam words, capitals, punctuation, emoji and merge tags.
Test
- Line A
- Saved
- Line B
- Saved
- A/B test
- Ready
Edit, save and test
Open a line to edit it and see it in a desktop and a phone inbox, save the ones you like, then test your top two against each other.
On Tanqory
Write the whole campaign, not only the subject
A subject line opens the email. On Tanqory, AI writes the email behind it and the store sends it from the same admin, so one person can run a campaign that used to need a writer and two extra apps.
The email, written for you
Ask the assistant to write the campaign email, the product copy it links to and the subject line. Everyday writing like this is included in every plan and does not use AI credits.See the AI assistant
Marketing email, built in
Marketing email and workflow automation are part of the plan, with no extra app to buy and connect. Campaigns go out from the same admin as your orders and products.See marketing
The assistant acts, you confirm
The assistant works across marketing, discounts, products and customers in the admin. It sets up the offer behind the subject line and waits for your confirmation before it acts.See discounts
A store to send them to
Describe what you sell and Tanqory drafts a store ready to sell: brand, theme, pages and products. The link in every email then opens a real storefront.See the AI store builder
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Questions about email subject lines
The help center covers marketing email, automation and your store step by step.
Visit the help centerHow long should an email subject line be?
Aim for 30 to 50 characters. A desktop inbox shows about 60 characters before it cuts the line, and a phone in portrait shows about 40, so the words that matter go first. The generator's Short setting keeps every line under 35 characters.
What is preview text and how long should it be?
Preview text, also called preheader text, is the line an inbox shows after or under the subject. Most phones show about 90 characters of it over two lines. Write 40 to 90 characters that add a reason to open, and never leave it empty, or the inbox fills it with the email's first words.
Which words trigger spam filters?
Filters look at the whole email and your sending history, not one word, but some phrases add risk: "act now", "click here", "you won", "cash bonus", words in capitals and stacked !!! marks. The score names each one it finds so you can rewrite it.
Should I use emoji in subject lines?
One emoji can help a line stand out, especially for a playful brand, and it counts as one character. More than one looks like spam to many readers. Turn Add an emoji on and compare lines with and without it in an A/B test.
Do personalized subject lines get more opens?
A first name can make a line feel written for one reader, and it is worth testing against a plain line. Use your email tool's merge tag, such as {first_name}, and set a fallback like "there" so contacts without a name never see an empty gap.
Is this subject line generator free, and does it use AI?
It is free, with no account. It writes lines from patterns for each campaign and tone, filled with your words, and scores them with fixed rules, all in your browser. Nothing you type is sent to Tanqory or anyone else. On Tanqory, the AI assistant writes subject lines and whole emails for your store.
What makes a good abandoned cart subject line?
Name the product left in the cart, keep it friendly and send the first reminder within a day. A second reminder can add urgency or an offer. Pick Abandoned cart as the goal and the generator writes lines and preview text for both.
How do I A/B test subject lines?
Save two lines that differ in one thing, such as with and without the first name, and send each to a random part of your list. Compare opens after a few hours, then send the winner to the rest. Test one change at a time so you know what made the difference.
The help center covers marketing email, automation and your store step by step.
Visit the help centerThe subject gets it opened. The store gets it sold.
On Tanqory, AI writes the campaign email and the store sends it, with marketing email and automation in the plan and everyday writing without AI credits.