Glarity

Glarity is a free, open-source AI browser extension for students, researchers, learners, and busy professionals who need faster ways to understand and translate online content.

Key capabilities include:

• YouTube summaries with video highlights, timestamps, FAQs, subtitles (including bilingual subtitles), and in-page AI Q&A to pull specific answers from a video.
• Google search result summaries and cross-language search assistance to scan results and topics more quickly.
• Webpage and PDF summarization with interactive Q&A, plus text extraction for quoting or note-taking.
• Side-by-side translation for webpages, PDFs, and selected text in 90+ languages, plus image/screenshot analysis for translation and interpretation.

Pricing: Free with a generous free tier; supports ChatGPT Plus for access to advanced models.

Notable for being open-source (GitHub available) and for supporting multiple AI models, including GPT-4o, Claude 3.5, and Gemini, across a single workflow for summarizing, translating, and reading web content.