ANYFREEBOOK searches 12 open-access libraries at once and asks them in parallel. Nothing here is scraped from a shadow library: each source publishes its own catalogue, and each result carries the tier its source actually supports. When a title is a real download, the page says so and links the file. When it is not, the page says that too, and offers a genuinely free alternative instead.
The same list is available as JSON at /api/v1/sources, so it cannot drift from the code.
The largest library of public-domain ebooks. Every ebook has a plain-text, EPUB and HTML edition, so a title matched here is a file you can download right now.
Over 5.7 million scanned books. Most are downloadable; a large lending collection is borrow-only, and the tier says which.
The catalogue layer: what exists, and which edition of it is free. It is the best place to check a title before you search for a copy.
A catalogue of books, some of them free to read. A record here is not a confirmed download, so the tier stays unverified.
Public-domain books read by volunteers, as free chapter files. Not included in a website search — an audiobook is rarely what someone typing a book title wants.
The open-access subset of the biomedical literature, free as PDF.
The Directory of Open Access Journals: peer-reviewed journals that are free to read and download.
An index of scholarly works and their open-access copies. Only works marked open access are returned, so a paywalled paper never appears as free.
The CERN research repository. A record carries its licence and a direct file, so the tier can be stated rather than guessed.
Public-domain texts in every language that has an edition. Each page renders to a PDF, and language categories on the site search the edition for their own language.
The European Union aggregator of museums, archives and university libraries. Only openly licensed records are returned.
Peer-reviewed open textbooks, with the licence, the publisher and the formats stated on the record.
The hand-picked catalogue behind the category pages and the book detail pages. 258 books across 241 categories. It powers the category pages and the book detail pages.
Every title carries a legal tier: download means a verified public-domain full text with the author matched; borrow means a real copy that the lending library restricts; unverified means the record exists but the licence is not confirmed, so we link the source and say so rather than claim a free download. See free textbook alternatives for what to read instead.