Cruxly analyzes everything and forgets nothing
Video, PDF, a webpage, a contract — any of it turns into a clear breakdown in minutes. And what you flag for yourself doesn't disappear: Cruxly works out what relates to what, and remembers it for you.
One service, four ways to use it
Analyzer
A video, a PDF, a webpage, or a contract — structure, key points, and numbers in a couple of minutes, no rewatching or flipping through pages.
Start analyzingAI Chat
Ask questions straight about the content — the answer is grounded in the actual text of your file or video, not the model's general knowledge.
Try the chatSecond Brain
Save the thoughts that matter in one click — Cruxly finds the connections between them, groups them by theme, and brings them back when they're relevant again.
Explore Second BrainChrome extension
Right on the YouTube page — no copying a link, the summary opens in one click.
Add to ChromeCommon 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 whatever you need broken down
A video link, a PDF, or a contract — start with whatever you've got.
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.
A few more details that save time
Personal archive
Every analysis is saved to your account and organized into folders and projects.
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 the full transcript, word for word, 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 AnalysisYour AI Second Brain
A summary covers one video or one PDF. Cruxly's AI second brain is where the specific pieces that matter to you live on after that: highlight any passage from an analysis, not just the ones it already flagged, and Cruxly connects it to everything else you've saved by meaning, groups related thoughts by theme, and brings older ones back once they've had time to fade. It's part of every registered account, and there's a dedicated chat grounded only in your own saved thoughts.
Learn more about Your AI Second BrainAI Website Page Analysis
It's hard to tell whether a long article is worth the time until you've already spent it. Cruxly can analyze any webpage with AI — paste a link to an article, blog post, or documentation page, and the service pulls out the readable text, then builds a TL;DR, key points, practical advice, and an action plan. Works the same way for a news story, a product page, or a documentation page, in any language — Cruxly translates the result into 12 languages. Ask a follow-up question in the AI chat, save a passage to your second brain, or just decide in a few seconds whether the page is worth opening at all.
Learn more about AI Website Page AnalysisFrequently Asked Questions
Analyze. Cruxly remembers the rest.
Upload a video, PDF, or contract — get a breakdown in minutes, and the thoughts that matter stay within reach a month from now, or a year from now.
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