Read PDFs, EPUBs, and Markdown privately—with optional AI assistance.
About Xolio
Xolio is a free, open-source ebook reader for PDF, EPUB, and Markdown files. Read directly in your browser, organize a local library, search books, save highlights and bookmarks, and ask AI to simplify, explain, summarize, or analyze selected passages.
Your books remain on your device, with no account, uploads, analytics, or application server required. AI is optional and works with your own provider key or local model.
Your books remain on your device, with no account, uploads, analytics, or application server required. AI is optional and works with your own provider key or local model.
PlatformsWeb
LaunchedSep 10, 2026
✓ VerifiedSep 26, 2026
Key features
- PDF, EPUB, and Markdown support
- Private, local-first browser reading
- Local library with grid and list views
- Drag-and-drop book importing
- In-book search with keyboard shortcuts
- Highlights and bookmarks for every book
- Automatic reading-position restoration
- PDF zoom and fit-to-width controls
- EPUB table-of-contents navigation
- Fast, virtualized rendering for large Markdown files
- Optional AI explanations, summaries, and key points
- Bring your own AI provider key or local model
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