Cruxly: AI Summarizer for YouTube & PDF
You spend hours on videos.
We give you the essence in minutes.
Paste a YouTube link or upload a PDF — AI extracts key ideas, structure and theses. Ask questions directly about the content.
Skip the copy-paste — summarize videos right on YouTube
Install the Cruxly extension and get a summary without ever leaving the video page. It's the fastest way to use Cruxly — one click, right where you're already watching. Available for Google Chrome.
Common pain
«You watch a 2-hour lecture but only retain 20%»
Get a structured summary in 2 minutes
«A pile of unread PDFs, courses and articles grows every day»
Upload a file — AI extracts the key points
«Read → understood → forgot a week later»
Ask the AI anything — it remembers the whole thing, so you never re-read
Three Steps From Link to Summary
Add a video or PDF
Paste a YouTube link or upload a PDF — we handle the rest.
AI analyzes content
The model extracts the essence, key theses and structure.
Ask any question
Ask anything about the video or PDF — the AI answers from the actual content, not a guess, and remembers the whole conversation.
The analysis isn't the end — it's the start of a conversation
Every video or PDF you analyze comes with a chat that remembers the entire thing. Ask it to explain something simpler, compare two arguments, or pull out one specific number — no re-watching, no re-reading. Come back a week later and pick up exactly where you left off.
Try the chatEverything Cruxly Can Do
YouTube Video Analyzer
Transcription, structure and theses in seconds.
PDF Analyzer
Meaning from multi-page documents and reports.
Save
Results — to your personal archive for further work.
Folders & Projects
Organize analyses by topic and project.
AI Chat
Our most-used feature — answers grounded in your file, not a generic chatbot.
Export
PDF, Markdown or DOCX in one click.
12 languages
Results in your preferred language.
Detail level
Brief, medium or detailed format.
AI YouTube Video Analysis
A two-hour lecture or podcast shouldn't cost you two hours. Cruxly lets you summarize YouTube videos with AI — paste a link and the service pulls the captions or transcribes the audio, then extracts the key ideas, points, and structure of the video. Instead of taking notes by hand, you get a ready summary in a couple of minutes: check it before an exam, search it for a specific moment, or just move on without rewatching the recording. Works for lectures, podcasts, webinars, and reviews in any language — Cruxly translates the result into 12 languages. And if the summary leaves a question unanswered, the AI chat is right there to dig deeper without rewatching a second of the video.
Learn more about AI YouTube Video Analysis
AI PDF Document Analysis
A pile of unread PDFs grows faster than you can get through it. Cruxly can summarize PDF documents with AI — upload a file and the service extracts the text, recognizes its structure, and produces a summary with key ideas and a section breakdown. Works for textbooks, research papers, business reports, and contracts of any length, from a short article to a full book. Instead of flipping through dozens of pages looking for the right paragraph, you get a ready summary in a couple of minutes and can immediately ask a follow-up question in the AI chat. Save the result to your personal archive and export it as PDF, Markdown, or DOCX whenever you need it.
Learn more about AI PDF Document Analysis
Chat with PDF Using AI
Sometimes a summary isn't enough — you want to dig into one specific detail. Cruxly lets you chat with your PDF or video using AI — after analysis, a conversation opens up that remembers the entire content of the file or video. Ask it to explain something more simply, request an outline, or a comparison — and get an answer grounded in the actual text, not the model's general knowledge. Chat history is saved, so you can come back to a document a week later and pick up where you left off. It's Cruxly's most-used feature — it turns a static summary into a live conversation with your material, whether that's a PDF or an already-analyzed YouTube video.
Learn more about Chat with PDF Using AI
AI Video Transcription
Sometimes you don't need a summary — you need the exact words. Cruxly can transcribe YouTube videos to text: the service transcribes the audio track or pulls the captions and returns a full transcript broken down by speaker turns, with nothing shortened or rephrased. Useful for quoting, creating subtitles, writing an article based on a video, or simply reading instead of listening. Transcripts are available in the original language or translated — Cruxly supports 12 languages. Export the text as PDF, Markdown, or DOCX and drop it into any workflow, from cutting subtitles to quoting a source in an article or a journalistic record.
Learn more about AI Video Transcription
AI Contract Analysis
A contract read start to finish is rare, and the clause that actually matters is usually the one that gets skipped. Cruxly can analyze a contract clause by clause with AI: check "This is a legal document" before uploading, and instead of a condensed summary you get every clause on its own, with a plain-language paraphrase, a category, and a risk flag. Works on service agreements, employment contracts, NDAs, and leases, in any language. This isn't legal advice, but it turns the slowest part of reviewing a contract, finding what actually needs reading, into a couple of minutes.
Learn more about AI Contract AnalysisFrequently Asked Questions
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No more spending hours on notes. Just paste the link and start.
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