SubjectLine.com

If you're looking for a tool to help you craft the perfect subject line for your next email campaign, look no further than SubjectLine.com. This site offers a free subject line rating tool that has been tested on over 6 million subject lines.

SubjectLine.com is easy to use.

Simply enter the subject line you're considering using into the tool, and it will rate its effectiveness on a scale of 1 to 100.

You can also see how your subject line compares to others that have been tested.

This site is a great resource for anyone looking to improve their email marketing results.

The subject line is one of the most important elements of an email campaign, and SubjectLine.com can help you create the best ones possible.