Crosstab is a Chrome Extension designed to transform web browsing into custom datasets. It allows users to define the data they want to export using natural language prompts, and can extract data across multiple pages. The exported data can be saved as a CSV file or copied instantly to the clipboard. Crosstab also features a 'Search Mode' to enrich existing data and automate research tasks, advanced AI for intelligent results, background processing for large tasks, and direct integration with AI language models like ChatGPT, Claude, and Grok. It offers various pricing tiers and emphasizes security with SOC2, HIPAA, and GDPR compliance, along with zero data retention and default encryption.