DMARC Report Reader is a Chrome extension designed to read and visualize DMARC aggregate reports from various file formats, including XML, ZIP, and GZIP. It provides privacy-focused analysis directly within the browser without requiring uploads or server interaction. The tool supports Gmail integration with automatic attachment detection and one-click report viewing, while Outlook Web integration is currently experimental. This makes it a convenient option for users managing email authentication without compromising their data privacy.

Key features include comprehensive reporting with a summary dashboard, advanced filtering options, and the ability to distinguish between spoofing and misconfiguration. The extension also offers IP enrichment capabilities and multiple export formats like JSON and CSV. Completely open source, DMARC Report Reader processes all data locally, ensuring that reports remain on the user's device, making it a valuable tool for domain administrators, security teams, and IT professionals.