12 Subject Line Tester Tools to Boost Your Email Open Rate
June 6, 2021by ahVanguard
Do you struggle to get prospects to open your emails? For some people, writing clever, witty, clickable subject lines can be a challenge — and that’s where subject line tester tools can come in.
Check for spam triggers, get suggestions for making your subject lines more emotive, and get an overall grade on how clickable your emails are.
In this post, we’ll run through tools to improve you email subject lines for better clickability and deliverability to get more replies from more prospects.
Want to know how your sender name, subject line, and pre-header text will appear on the most popular mobile devices of the moment? This tool gives you an instant preview of how copy will appear to your audience. You know, for those moments you want to avoid someone’s iPhone 6 turning “Products for foolproof marketing” into “Products for fool …”.
Receive an overall numerical score on how compelling your subject line is, along with suggestions on how to improve it. You’ll also learn how close your character and word count are to the ideal length (50-65 characters or six-to-seven words).
And, find out how your word mixture and balance measures up. Need a little more emotion, action, or power? Subject Line Grader gives it to you straight.
You spend time crafting your emails, and you don’t want them to get caught in someone’s spam folder, right? Copy and paste your subject line, pre-header text, email message, and sign-off into this tool, and find out exactly what will trigger spam filters and trap your emails in “The Upside Down.”
This is a deluxe tool that’s probably best for whole teams rather than individuals. Depending on your tier, you’ll receive subject line testing functionality, email reporting, segment testing, filter options, and technical support.
You can also compare your results with those of the 21 billion emails stored in Touchstone’s database.
This tool doesn’t beat around the bush. Get an overall score for your subject line, see where and why you lost points (i.e., “Does not contain a sense of urgency” -15 points), and advice for how to make it better.
Send your email to the address provided in their homepage and receive a comprehensive spam report in return. This tool flags wording or phrases in your subject line and email body that will trip spam filters. It also checks that your own ID is clean, and suggests fixes for any spam-related issues that arise.
This tool was built to analyze blog/article headlines, but it works just as well for subject lines. Headline Analyzer gives you an overall headline score and provides tips on structure, grammar, and word placement.
Widely considered the gold standard in headline testers, this is definitely a tool to keep in your back pocket.
Not a literature buff? Legendary author Ernest Hemingway was known for his straightforward writing style. There were no warm sunset walks festooned with bright spring blooms in his books. Hemingway would have written, “We took a walk. It was warm. The flowers were in bloom.”
This app is helpful for editing the body of your email. Copy and paste your follow-up email into this tool to get an overall readability grade, find out where you’ve used passive voice, if you have too many adverbs, and which sentences are hard to read.
Did you know 20% of the English language is made up of EMV words? Find out if your headline appeals to the intellectual or empathetic side of your prospect’s brain, and learn which side you want to appeal to given the goals and content of your emails.
This tool asks you to select a business sector and type in your keyword — the main point of your subject line. For example, if my email subject line is, “Checking on contract status” I would type in “Contract” as my keyword.
In this case, the tool would tell me open rates are .35% below average for emails using the word “contract” in the subject line. Given this information, I might choose a different subject line keyword.
Email spam checker tools scan your subject lines and email copy so they won’t get automatically marked as spam and downgrade your email deliverability.
Is Not Spam has you actually send your email draft to them, and they deliver a report within a few minutes, grading everything from your subject line, email body copy, and HTML code for deliverability, with specific suggestions for improving it if it doesn’t make the cut.
Like Is Not Spam, but with paid features you can share with a team and track over time, Email Spam Tester conducts a thorough grading of all elements of your email drafts and gives you guidance for how to improve them.
Subject lines are the most important part of your email. In fact, 33% of email recipients report opening emails based on the subject line alone. Make the most of inbox attention, and ensure subject lines grab your prospect’s eye every time.