From video to structured knowledge
Three simple steps. No accounts, no extensions, no friction. Just paste a URL and let Synapse turn hours of video into actionable notes in seconds.
Paste any YouTube URL
Drop any public YouTube link into Synapse. We instantly validate the URL and begin extracting the full transcript — no browser extensions, no downloads, no account required.
- Supports any public YouTube video
- Handles videos up to 6+ hours long
- Automatic language detection
- Falls back to subtitle extraction if needed
AI structures the content
Our AI engine analyzes the full transcript, identifies the narrative arc, and restructures everything into logical sections with timestamps, key takeaways, and formatted code blocks.
- Powered by Llama 3.3 70B via Groq
- Contextual understanding, not just transcription
- Auto-detects code snippets & formats them
- Generates key takeaways per section
Download or copy your notes
Your structured, beautifully formatted notes are ready in seconds. Copy them to your clipboard or download as a Markdown file — ready for Notion, Obsidian, or any knowledge base.
- One-click copy to clipboard
- Download as clean Markdown
- Works with Notion, Obsidian, Logseq & more
- Timestamped sections link back to the video
Built for speed and accuracy
A look at the technology powering Synapse's note generation pipeline.
Transcript Extraction
Multi-method transcript fetching with automatic fallback to subtitle parsing via yt-dlp when direct API access is unavailable.
Llama 3.3 70B via Groq
Inference at ~500 tokens/sec. The model understands context, identifies code blocks, and structures content hierarchically.
Smart Code Detection
Automatic language identification and syntax-aware formatting for every code snippet mentioned in the video.
Structured Output
JSON-mode response ensures reliable, consistent note structure with titles, summaries, sections, and key takeaways.
Notes in your language
Synapse can generate notes in multiple languages regardless of the video's original language. Watch in English, get notes in Hindi — or any combination.
English
English
“Structured study notes generated from video content.”
Hindi
हिन्दी
“वीडियो सामग्री से संरचित अध्ययन नोट्स उत्पन्न।”
Hinglish
Hindi + English
“Video content se structured study notes generate kiye gaye.”
Input language is auto-detected from the video transcript. Output language is selected by you on the generate page. Code blocks always stay in their original programming language.
Ready to try it?
Paste any YouTube URL and get structured, AI-powered notes in under 5 seconds. No sign-up required.
Generate Notes Now