The YouTube Highlighter extension is a specialized Chrome extension designed specifically for highlighting and taking notes on YouTube video transcripts. Unlike our main Web Highlights extension that works on all websites, this focused extension only handles YouTube videos, making it perfect for students, researchers, and content creators who primarily consume educational content on YouTube. You can highlight one video per day for free, with full highlighting capabilities including color-coded highlights, personal notes, and AI-powered summaries.

YouTube highlighting is incredibly simple and powerful:

• Automatic transcript extraction: The extension fetches the video's transcript from YouTube's captions
• Seamless integration: A highlight button appears directly in YouTube's video player controls
• Reader mode activation: Click the button to open the video in our distraction-free reader
• Real-time synchronization: Transcript scrolls and highlights as the video plays
• Full highlighting support: Highlight text, add notes, create tags, and generate AI summaries

Perfect for TED Talks, podcasts, educational videos, and any long-form content on YouTube.

Yes! We offer a free YouTube highlighter tool that works directly in your browser without any installation. Simply paste any YouTube video URL, and you can start highlighting and taking notes immediately. However, for the best experience with automatic transcript loading and seamless video synchronization, we recommend installing the YouTube Highlighter extension.

The YouTube Highlighter works with most videos that have captions available, including:

• Auto-generated captions: YouTube's automatic speech recognition captions
• Manual captions: Creator-uploaded subtitle files
• Multiple languages: Videos with captions in various languages
• Educational content: TED Talks, lectures, tutorials, and courses
• Long-form content: Podcasts, documentaries, and interviews

The extension automatically detects available captions and loads the transcript in your preferred language when possible.

Yes! The YouTube Highlighter extension offers a generous free tier that lets you highlight one video per day with full functionality. This includes:

• Unlimited highlights and notes on your daily video
• Color-coded highlighting with multiple colors
• Personal notes and annotations
• Custom tags for organization
• AI-powered video summaries
• Export options (PDF, Markdown)
• Video-transcript synchronization

For unlimited daily videos and advanced features like cloud sync, you can upgrade to our premium plans.

Our video-transcript synchronization is one of the most powerful features for studying YouTube content:

• Auto-scroll: Transcript automatically follows video playback
• Time markers: Click any part of the transcript to jump to that exact moment in the video
• Current sentence highlighting: The spoken text is highlighted in real-time as the video plays
• Manual control: Toggle auto-scroll on/off as needed
• Pin video: Keep the video player visible while scrolling through the transcript

This makes it incredibly easy to review specific parts of videos and jump between your highlights and the corresponding video moments.

The YouTube Highlighter extension stands out because it's specifically designed for YouTube content consumption:

• Focused functionality: Only handles YouTube videos, making it lightweight and fast
• Automatic transcript extraction: No manual work needed - just click and highlight
• Seamless video integration: Works directly within YouTube's interface
• AI-powered summaries: Generate quick summaries of entire videos
• Study-friendly features: Customizable fonts, themes, and reading modes
• Export capabilities: Send highlights to Notion, Obsidian, or other second brain apps

Unlike general note-taking apps, this extension understands YouTube's structure and provides specialized tools for video-based learning.