Internet Archive Downloader is a free Chrome extension developed by Element Davv. It falls under the category of Browsers and is specifically classified as an Add-ons & Tools subcategory. This extension allows users to download PDF books from archive.org for offline reading.

With over 34 million books available for free access on archive.org, this extension provides a convenient way to download books for later reading. After borrowing a book on archive.org, two new buttons, "Quality" and "Download," appear under the book viewer alongside the "Favorite" button.

To download the current book as a PDF file, simply click the "Download" button. Alternatively, users can download each page as a JPEG file by pressing the "Download" button while holding the Ctrl key (Command key on Mac). During the download process, the button transforms into a progress bar.

The extension offers multiple quality options for each book, with up to four levels available. Users can select their preferred quality by clicking the stars on the "Quality" button. The default option is the best quality, which preserves the original image without scaling it down.

The extension also includes several recent updates, including automatic return of books after successful downloads for availability to other users, bug fixes related to unexpected aborts and incorrect settings, automatic retries for network errors during downloads, and improved compatibility with various browsers.

Overall, Internet Archive Downloader is a useful tool for avid readers who want to download PDF books from archive.org for offline reading.