LintMail is a free Chrome extension designed to audit HTML emails before sending. It offers a range of features including accessibility checks, deliverability assessments, and compatibility evaluations across major email clients. By simply pasting or uploading HTML, users can receive a weighted score from 0 to 100, along with actionable feedback on any issues detected. The tool ensures that emails are compliant with best practices while also enhancing their deliverability and accessibility.

Key functionalities of LintMail include support for multiple email campaign types, ESP detection for various platforms, and a live preview feature that simulates how emails will appear across different settings, including Dark Mode. Users can also perform A/B comparisons, track analysis history, and export reports in various formats. With a focus on privacy, LintMail operates entirely within the browser, ensuring that user data remains secure.