Harpa.ai

HARPA AI is a browser extension that brings multiple AI models directly into your web browsing experience. It lets you interact with OpenAI GPT-4o, Claude 3.7, Gemini 2.0, Perplexity, and local models like Llama on any website you visit. You can summarize YouTube videos and blog posts, draft context-aware email replies, monitor web pages for changes, track e-commerce prices, and automate repetitive web tasks without switching tabs.

The tool stands out with its hybrid browser automation and AI engine. It offers over 100 ready-to-use prompts for specific tasks like SEO audits, language learning, code rewriting, and marketing content generation. Key differentiators include its '//' quick command shortcut for text actions (F to finish, G for grammar check, P to rephrase), ability to mimic your writing style, and robust privacy features—it runs locally, doesn't log conversations, and supports GDPR compliance.

This is ideal for professionals who work extensively in browsers: content creators, marketers, researchers, and e-commerce managers. Real-world use cases include quickly extracting key points from hour-long training videos, drafting personalized LinkedIn outreach messages based on profile content, getting price drop alerts for Amazon products, and automating data extraction from websites for market research.