Use case
Turn a PDF into a course — outline, lessons, and quizzes from your own file
Upload the PDF, and it is split into chapters automatically. Pick the chapters you want and each one comes back as a teaching outline, lessons written section by section, key-point callouts, and a quiz after every section — a course, not a summary. Everything is generated from your file only, and you read it in a single continuous scroll rather than a chat window.
This page walks the whole flow: the three steps, what the parser can and cannot take, and the credits arithmetic so there are no surprises.
Step 1 — Upload the file
Drag the PDF in. Nothing is generated yet: the file is parsed, chapters are detected, and you get a list of them. Parsing itself costs no credits, which matters because it is also where you find out whether the file is usable at all — a scanned PDF with no text layer is rejected at this point with a clear message instead of quietly burning credits on empty pages.
Chapter detection is the part that decides how good the rest will be, and it is why the chapter is our unit of work rather than the page or the token window. A chapter is roughly the amount of material a person can sit down with once, and it is also the natural unit for "generate this bit now, the rest later."
Step 2 — Generate the chapters you need
Choose the scope: the whole document, only the chapters that have no materials yet, or just the ones you tick. Then choose two things about the output — the language, and how long each chapter should be (standard suits most material; in-depth is for dense or difficult text).
Before anything runs you get an estimate, and it is held against your balance rather than charged. Generation then goes chapter by chapter with live progress. Long jobs keep running if you leave the page, and if you pick economy mode the job runs in the background at half the price and you get an email when it is finished. When the job completes, the hold is reconciled against the tokens actually used, so an over-estimate comes back to you.
What lands in your library per chapter: an outline of what the chapter teaches, lessons split into sections, key-point callouts inside the text, and a quiz per section.
Step 3 — Read it, and test yourself
The reader is one continuous scroll per chapter — no page flips, no prompting. Highlight as you read, mark a chapter done when it is done, and answer the inline quizzes as they come up. Two extras worth knowing about: a concept map per document that shows the ideas the material teaches and how they connect, and custom quizzes — pick a question count and an optional time limit, and get a fresh set of questions across what you have generated. That is the difference between having read something and being able to answer questions about it.
Formats, limits, and what will not work
| Supported | |
|---|---|
| File types | PDF, EPUB, HTML, Markdown |
| Size | Up to 80MB per file |
| Text-layer PDFs (exported, typeset, or digital-first) | Yes |
| Scanned PDFs and photographed pages | Not yet — detected and refused before you are billed |
| DRM-protected commercial ebooks | No — bring files you have the right to use |
| Output language | Your choice, independent of the source language |
One rule that is not a technical limit: upload only material you have the right to use. Your own lecture notes, internal reports, papers, public-domain books, DRM-free ebooks — all fine. A pirated bestseller is not, and there is no catalogue here that would substitute for one.
What it costs
One credit is US$0.01, and generation is billed by real token usage — never per page and never per file. The reason a range is the honest answer is that cost tracks the number of chapters as much as the total length: every chapter gets its own outline pass, its own lessons, and its own quizzes, so twenty short chapters cost more than eight long ones covering the same number of pages.
Using the current estimator on English material at standard length:
| Material | Credits, roughly | At US$0.01 per credit |
|---|---|---|
| A 30-page report | 15–40 | US$0.15–0.40 |
| A 100-page document | 70–130 | US$0.70–1.30 |
| A 300-page book | 150–400 | US$1.50–4.00 |
Three things move you inside those ranges: chapter count (more chapters, more credits), chapter length setting (in-depth costs more than standard), and scope — generating four chapters out of thirty costs roughly four chapters' worth. Economy mode halves the bill in exchange for waiting and an email.
Signing up gives you 300 credits, enough to take a long report or a short book all the way through, plus an example course that is already generated so you can see what the output looks like before spending anything. Every charge is itemised afterwards: which job, how many tokens, what it cost.
Why not just paste it into a chatbot?
You can, and for a single question that is the faster path. The difference shows up on the fourth evening. A chat gives you an answer per question you think to ask, which means the quality of your learning is capped by the questions you already knew to ask — and nothing is left behind except scrollback. A generated course fixes the structure up front: here are the chapters, here is what each one teaches, here are the questions you should be able to answer. Your material stays yours, it is used only to generate your course, and deleting a document removes its chapters and generated materials with it.
FAQ
Do you support scanned PDFs?
Not yet; if no text layer is detected we'll tell you clearly — no wasted credits. A scanned page is an image as far as the parser is concerned, so there is nothing to read. If your file was scanned, run it through OCR first and upload the text-layer version.
Which formats and sizes can I upload?
PDF, EPUB, HTML, and Markdown, up to 80MB per file. It has to be material you have the right to use — your own notes and reports, internal company documents, papers, public-domain books, DRM-free ebooks.
Can I generate only part of a long PDF?
Yes, and it is usually the smart move. Chapters are split automatically and you choose the scope before generating: the whole book, only the chapters that have nothing yet, or exactly the ones you tick in the list. You are billed for what you generate, so a 400-page reference book you only need three chapters of costs about as much as those three chapters.
What does a PDF cost in credits?
Billing is by actual token usage, so it tracks length and chapter count rather than a flat per-file price. A 30-page report is typically 15–40 credits, a 100-page document 70–130, and a 300-page book roughly 150–400. One credit is US$0.01. You see an estimate before you start; it is held upfront and reconciled against real usage on completion.
Can the course be in a different language from the PDF?
Yes — you pick the output language when you start a generation, so an English source can produce a course in Traditional Chinese, Japanese, and so on. The source file is read as-is; only the generated material follows your choice.