Free AI Subject Line Generator by Mailmodo

No more writer’s block. Use Mailmodo AI to write subject lines in seconds.

Driving Curiosity
Title case

New Collection
Product Update
Product Launch
Event Emails
Survey Emails
New Feature Launch
Like this subject line generator? Tell the world about itfacebooktwitterlinkedinemailwhatsapplink

Get 3X conversions
with interactive emails


Create & send interactive emails without coding


Put revenue on auto-pilot with pre-built journeys


Save time with AI-powered email content creation

1000+ businesses grew with Mailmodo, including


All you need to know about email subject lines

Dive deep into the intricacies of getting email subject lines right with our resources

Have you ever struggled to come up with the perfect subject line for your email? If so, you're not alone. Many people find it challenging to craft a subject line that captures their reader's attention and entices them to open email. That's where AI subject line generators come in.

In recent years, AI technology has advanced significantly, and AI subject line generators have become increasingly popular. It's because use of artificial intelligence and machine learning, including advanced technologies such as GPT-3 and GPT-4. With its ability to mimic human language and behavior, the resulting subject lines are highly effective in capturing reader attention and generating increased opens, clicks, and conversions.

So, why are AI subject line generators so popular lately? The answer is simple: they work. With the help of generative AI or AI subject line generators like Mailmodo's, you can create an extremely good copy or subject lines within minutes, which would otherwise have taken hours for a copywriter to come up with. With crazy good subject lines, you can easily grab the attention of your audience and make your emails or newsletter stand out among the clutter.

As marketers give the subject line generator a try, they will see the magic happen and be amazed by the lucrative results and making email subject line generators popular.

Why subject lines are the backbone of email marketing?

Did you know that 64% of recipients decide whether to open or delete emails based solely on their subject lines? That insightful subject line statistic highlights just how vital it is to have a compelling and attention-grabbing subject line for any email campaign.

People's inboxes are overflowing with messages from various sources, and with so many emails vying for attention, it's crucial to make sure your subject line stands out. A good subject line can not only increase your open rates but also improve your chances of achieving your desired email marketing goals.

Importance of subject lines in email marketing

  • Captures the reader's attention with action verbs

  • Determines whether email will be opened or ignored

  • A bad subject line can lead to unsubscribed or spam

  • Plays a crucial role in reaching email marketing goals

💡 150 Email Subject Line Ideas That Grab Attention

How to write/edit email subject lines that get opened?

Struggling to write or edit effective subject lines that actually get opened is a common problem for many marketers and business owners. To help you out, let's start with some fundamentals. Your subject line should be clear, concise, and relevant to your audience. It should also create a sense of urgency or curiosity to encourage them to open your email.

But if you're ready to take your subject lines to the next level, Mailmodo is here to spill the beans on some advanced frameworks. And as a bonus, we're offering a free ebook on how to write effective email subject lines.

💡 Free Ebook: A step-by-step guide on writing subject lines that boost email opens with [email subject line templates].

Is personalization in email subject lines worth it?

Did you know that personalized subject lines are 26% more likely to be opened? That's right - by simply including the recipient's name or other personal details in the subject line, you can significantly increase the chances of your email being read.

But it's not just about getting more open. Personal touch also helps establish a connection with your audience and makes them feel valued by the brand’s voice. It shows that you've taken the time to understand their needs and preferences, which can go a long way in building trust and loyalty.

So, if you're not already using personalized subject lines in your email marketing strategy, it's time to start.

💡 Bonus resource: 11 ways to personalize email subject lines.

What about analyzing subject line performance?

If you think your emails are performing well. It's time to take a closer look you might be wrong. One key factor to consider is subject line performance. A great subject line can make or break the success of your email campaign.

To improve your subject lines, try conducting A/B testing. This involves sending two versions of your email with different subject lines to a small portion of your audience and analyzing which one performs better. Once you have identified what works best, use that subject line for the rest of your audience.

And there is much more to uncover when creating truly effective ones. By delving deeper into past best-performing subject lines and analyzing why they worked, gaining a better understanding of what resonates with the audience, and customization of the future subject lines accordingly.


Frequently asked

Mailmodo’s AI email subject line generator is a tool that leverages artificial intelligence to craft compelling and personalized subject lines for emails, enhancing engagement and increasing open rates. Mailmodo's AI Subject Line Generator optimizes every character for maximum impact.
Using an AI email subject line generator like Mailmodo is easy. Input key details about your message, target audience, and tone. The AI analyzes and generates impactful subject lines, helping you boost email engagement effortlessly.
An AI email subject line generator, like Mailmodo's, employs advanced algorithms to analyze your content, audience, and goals. It then generates tailored subject lines, optimizing for relevance and impact open rates.
Mailmodo's AI Subject Line Generator excels in crafting tailored subject lines, optimizing tone, intent, capitalization, emojis, and personalization. Whether it's a promotional or nurturing campaign, it adapts to various customer phases, ensuring impactful communication.
Mailmodo’s AI email subject line generator enhances open rates, saves time, and boosts engagement. It crafts compelling, personalized subject lines, increasing the effectiveness of your email campaigns.

Built with by Mailmodo

Mailmodo is an all-in-one email marketing solution that boosts conversion with interactive emails and the power of AI.

With Mailmodo AI, you can

  • Generate subject lines and preheader in seconds
  • Write engaging email copy with one click
  • Create interactive emails that lets you add calendars, calculators, and forms inside emails