rrweb

rrweb is an open source library that records everything users do on a website and lets you replay their sessions exactly as they happened. It captures mouse movements, clicks, form inputs, and page navigation with pixel-perfect accuracy, creating a complete recreation of the user's experience that can be viewed later from any device.

The library works by recording the DOM state and user interactions, then serializing this data for storage. When you want to review a session, rrweb reconstructs the exact visual state and replays all interactions in the correct sequence. This approach is more efficient than video recording and provides better quality than traditional analytics tools that only track events.

Web developers and product teams benefit most from rrweb, particularly when debugging complex issues that are difficult to reproduce. Quality assurance teams use it to understand exactly what happened when users encounter problems, while product managers gain insights into how people actually interact with their websites. The tool is also useful for creating accurate demonstrations of web applications without needing screen recording software.