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IA Downloader
This browser extension downloads books from Internet Archive and HathiTrust Digital Library, with a notice naming its official source.
About IA Downloader
IA Downloader is a browser extension that downloads books from Internet Archive (archive.org) and HathiTrust Digital Library (hathitrust.org). It can save books as a PDF with embedded text or as per-leaf image files with book text, fetching leaves one by one to disk to handle books with thousands of leaves using little memory.
On Internet Archive it works with Lending Library and 14-day borrow books after borrowing. On HathiTrust it supports books with full-view permission without login. The project states its GitHub repository is the only official source for releases.
Key features
- Download books as PDF with embedded text, multiple languages supported
- Download each leaf as JPEG or PNG images plus book text
- Download multiple books in parallel
- Adjust quality level and choose PDF or ZIP output
- Set a preset download range for book leaves
- Optionally return a borrowed book when download completes
Best for: People who borrow books on Internet Archive or use full-view books on HathiTrust and want offline copies.
Good for
- Streams leaves to disk, handling books with thousands of leaves using little memory
- Supports PDF with embedded text and per-leaf image downloads
- Offers parallel downloads with configurable quality, format, and range options
Watch out for
- Works only with Lending Library and 14-day borrow books on Internet Archive
- Works only with full-view books on HathiTrust
- Firefox requires granting site permissions; manual install needs developer mode enabled
IA Downloader at a glance
- Category
- Software & Utilities › Firefox Extensions
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Browser extension, Windows
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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IA Downloader FAQ
Where is the official source to download the extension?
The project states the GitHub repository is the only official source and warns against downloading releases from other websites.
How do I get only part of a book on Internet Archive?
Hold Alt (Option on Mac) while pressing Download, then enter a leaf range; hold Ctrl (Command on Mac) to get JPEG files per leaf.
Do I need to log in to use it on HathiTrust?
No login or borrowing is required, but the book must have full-view permission.
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