Learn faster. Remember longer.

Second Brain turns PDFs, links, and videos into reliable notes and exam-ready flashcards—with spaced repetition built in.

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How Second Brain Works

1. Import

Drop a PDF, paste a link, or add a YouTube video.

2. Generate

We parse, cite, and create 10 study-ready flashcards.

3. Review

Reveal → grade (1–4) with spaced repetition.

ℹ️YouTube mode is in beta. Some videos may not work due to YouTube caption restrictions.

Mode

Automatically fetch captions from YouTube and generate flashcards.

Paste YouTube URL

Paste a link, then click 'Generate Flashcards'. This will create 10 flashcards.

Flashcard count

Always generates 10 cards for YouTube.

Count control removed for MVP reliability.

Allow auto-generated captions

Use cookies (consent/age gate)

Enable yt-dlp fallback

Languages (priority order)

Comma-separated codes; en-* maps to en internally.

YouTube generation creates 10 flashcards by default. (Count control removed for MVP reliability.)

Ingest anything

URLs, PDFs, YouTube—clean parsing and citations you can trust.

Great flashcards

Auto-generated, editable, and validated against your sources.

Spaced repetition

SM-2 scheduling with a smooth daily review flow.

Import a PDF or paste a link—your study queue will be ready in minutes.