There are many tools available to check subject lines and improve email open rates. Here are some popular options:
CoSchedule Headline Analyzer: This tool is designed for headlines, but it can also be used to analyze email subject lines. It analyzes your subject line based on several factors, such as word choice, length, and emotional appeal, and provides a score along with recommendations for improvement.
Send Check It: This tool analyzes your subject line and provides a score based on factors such as length, word choice, and sentiment. It also offers suggestions for improving your subject line to increase open rates.
SubjectLine.com: This tool analyzes your subject line and provides a score along with suggestions for improvement. It also offers a preview of how your subject line will appear on different email clients.
Litmus Email Previews: This tool allows you to preview your email in different email clients and devices, including desktop and mobile. It also provides feedback on your subject line and suggests improvements to help improve open rates.
Phrasee: This AI-powered tool uses natural language processing to analyze your subject line and provide suggestions for improvement. It also offers a preview of how your subject line will appear on different devices and email clients.
These are just a few options to consider when looking for a tool to help you improve your subject lines. It's important to test different subject lines and analyze the results to see what works best for your audience.