Mar 11, 2022

The Guide to Write Email Subject Lines and Using Email Subject Line Generators

Suman Samal, Asst. Marketing Manager
Suman Samal
The Guide to Write Email Subject Lines and Using Email Subject Line Generators
Suman Samal, Asst. Marketing Manager
Suman Samal
Mar 11, 2022

The Guide to Write Email Subject Lines and Using Email Subject Line Generators

This article will show how you can use the email subject line generator tool to create your email subjects and make a difference in your campaigns.
The Guide to Write Email Subject Lines and Using Email Subject Line Generators

Table of contents

As the cliche says, "Money is in the list", your email list can break or make the sale. And one of the most important parts of email is its subject line.

According to a study, 33% of recipients open their emails just by looking at the subject line.

This is one of the main reasons why email campaign subject lines must be eye-catching. You must work on them since they are just as vital as the content inside.

When a receiver sees the subject line, their initial impulse should be to open the email. It must catch the reader's attention. Otherwise, the email will blend in with hundreds of other unread emails in their inbox.

Creating an email subject line is not as simple as it sounds. You start with an awesome idea and input your text, but then the AI spits out something not even close to what you were hoping for.

So, how do you create an amazing email subject line that guarantees higher open rates? In this guide, we will be sharing the best ways to write email subject lines along with the list of best email subject line generator tools.

How to Write a Great Email Subject Line? 

There are various things to keep in mind when writing an email subject line. Here are some of the actionable tips to follow:

Keep your subject line short 

Your email subject line should be no more than 60 characters long. The optimal email subject line is 25 to 30 characters in the mobile version.

Place the important words at the beginning 

Your first word in your email title should be the most important thing to communicate in the email. This will help recipients focus on what's important to them and make it easier for them to read through your entire email.

Since you don't know the part of the subject line that will be readable from a smartphone, it's vital to include the most critical information at the front. Otherwise, important details may be omitted.

Be clear and specific about the email subject

A great subject line should be short. A good email should be easy to read. So don't overcomplicate the titles with too many details or irrelevant descriptions.

The subject line should clearly state the purpose of the email so that the receiver can prioritize its relevance without opening it.

Use logical keywords for filtering

When someone opens an email, they're typically looking for specific information. So in order to ensure that your message is received, use keywords that are likely to be searched by recipients.

It's critical to include keywords related to the email's topic so that it can be searched anytime.

Highlight the value you offer

When crafting your catchy subject lines, it's important to communicate the value you and your company offer. This can be done by using specific keywords related to the email or services offered.

Personalize the email marketing campaigns with the recipient's name

Not only should your email be tailored to the general population, but you can also personalize it for specific recipients. Including their first name in the subject line will help them stand out from the crowd and ensure that they receive your message.

Now that you have all these tips for creating an effective email subject line, let’s dwell on one of the most feared phenomena in the field of content; writer’s block. Even the most professional and polished copywriters may feel the wrath of creative's blocks.

That's why we have the email blog generator tools. Email subject line generator can generate cold email subject lines by focusing on the keywords and the main motive. Be it sales emails or cold emails, an email subject line generator is a great way to produce email subjects quickly.

Here is the list of the best online tools for creating the perfect email subject lines.

Best Email Subject Line Generator Tools in 2022

1. Active Campaign

Active Campaign is one of the most popular email marketing tools with a vast clientele of email marketers. You may create email headlines using keywords with ActiveCampaign's free email subject line generator.

It has three main categories; Topic, Benefit, and Pain Point.

Choose the category that you want to generate the subject line for and enter the keyword. Hit enter to generate the subject line ideas.

2. Scalenut 

Scalenut is a free AI copywriter tool that generates compelling email subject lines for any purpose. Besides this, Scalenut offers other copywriting templates for content creation. 

To use the Scalenut email subject line generator for free, you can start by signing up. Search for the 'Catchy Email Subject' template and enter the brand or company name and a small email description in the box.

Click on 'Generate' to get all the subject line ideas.

3. (Cold email subject line generator) is a free application similar to ActiveCampaign. Enter the focus term in one of the four categories available. If you can't find the right subject line, you can generate more recommendations. The entire contents of the window can be saved as an excel file.

B2B email marketing campaigns are well-suited to the outcomes produced. You may create subject lines for emails on the go using You may specify a keyword and pick from the selections indicated in the categories.

4. SEOPressor 

SEOPressor is popular as a blog title generator, but it has recently added the email subject idea generator tool to its arsenal.

Enter your search term and choose the category most likely to belong. It could be a generic noun, an event, a location, or something else. The program only displays ten results at a time, but there are more possibilities. 

Many of them need to be optimized, and you'll get some ideas to work on.

5. Automizy

Automizy's free subject line generator is next on the list. This tool is one-of-a-kind since it may copy and paste the body of an email before generating a suitable subject line. This is how you'll get a unique subject line for your email.

6. Headline and Subject Line Generator By Google

It's a Google Chrome extension that you can install for free. This email generator helps create email subject lines with higher open rates. Simply type in a target term to generate a catchy subject line.

You can choose among four categories: ‚ÄúList, How to, Question, and General.‚ÄĚ The next step is to type in your keyword or key phrase.

There are around 500 headline and subject line combinations to choose from.

7. Keap 

This subject line creator is a free tool but more focused on CRM solutions and A/B testing.

This free tool completes your task in three simple stages. First, select the type of email you want to send from the list of options.

After that, enter your target audience, interest and keyword category, and you will get the outcome. That's it; you'll get five subject lines, which you may use to garner more subscribers.

8. Send Check It 

Using this tool, you may compare your subject line to over a million emails. Send Check It uses 16 different criteria to check email subject lines.

Simultaneously, it makes suggestions for how to improve your email subject line. This tool examines the length of words and characters, readability, and scannability.

A mobile and desktop preview is also available.

A deeper analysis is also available to assess the sentiment of the topic line, i.e., whether it is positive, negative, or neutral.

Personalization, emojis, correct capitalization, and punctuation are all checked using the Send Check It feature. It can also detect spammy language, preventing email service providers from classifying your message as spam.

9. MooSend 

This is a subject line tester that may be used to determine your email open rate.

Moosend employs Artificial Intelligence (AI) to do real-time analysis of the email open rate.

When you submit your subject line, it also asks for other information, such as your industry, so that the expected open rate may be compared to the average open rate in your industry. It helps further enhance the topic line to achieve better results.

You can also obtain suggestions from Moosend on how to improve the look of your subject line, such as adding emojis, using the method of building urgency, personalizing the subject line, or working with the statistics.

10. Kickass Headline Generator 

Kickass is an online tool by Sumo that is best known for generating unique content ideas. Kickass Headline Generator is a tool for creating captivating headlines, but it can also be used to create free email titles.

It differs from the other platforms because it does not provide you with pre-made recommendations.

Rather, it generates formulas based on the parameters you specify. You can select the title format and then add additional requirements such as topic, audience, and outcome.


Q. Can we create newsletter titles using these email subject line generators?

Ans: Yes, we can use the email subject idea generator tool for creating newsletters titles.

Q. Do newsletters help SEO?

Ans: Email newsletters can help with SEO by increasing your brand's image and awareness. Your brand's reputation will eventually increase if you keep your loyal followers involved while also appealing to new users.

Q. Can I put the reader's name in an email subject?

Ans: The best way to give readers a feeling of personalized email is to use their first names. The emails with your name in the subject line usually stand out among the others that arrive in your inbox every day. The same is true for every one of your customers and readers.

Q. What one is better: a free or paid email line generator? 

Ans: A free email line generator may have some limitations such as the total number of generated ideas. Other limitations can include the category choice or type of email. 

Q. What is the fastest way to build an email list? 

Ans: The fastest way to build email list is by posting regularly, sending out more compelling emails and ensure that the email is more personalized. 


Email subject line generators and subject line testers are great tools to help you come up with creative and engaging email subject lines. However, it's important to remember that your email subject line should also be compliant with spam filters.

By using a tool that tests all the aspects of your email's subject line, you can ensure that your message will reach the right people and increase your open rate!

If you want to get started for free and get tons of free subject line ideas, we suggest you go with Scalenut. You can start the Scalenut for absolutely free. Give Scalenut a try and make more leads using the email subject lines.

Suman Samal
Asst. Marketing Manager
ABout the AUTHOR
Suman Samal
Asst. Marketing Manager

Suman Samal is a Asst. Marketing Manager at Scalenut. She is a technology enthusiast with a keen interest in content marketing and SEO. She truly believes that with the right set of tools every organization can improve the ROI of their content marketing campaigns. She spends her time managing content operations at Scalenut and ensuring that everything we publish is of the highest quality.

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