Browser speed reading
Ninja Reader is a browser-based speed reading tool. Upload a document, let the app extract plain text locally, and read it word by word with speed controls, pause, rewind and saved progress.
Ninja Reader reads TXT directly and extracts PDF, DOCX and EPUB into plain text in the browser. This makes it suitable for books, articles, manuals, notes and work documents inside one reading flow.
Document parsing happens in the browser. The main reading workflow does not require an account, installation or a server-side backend for normal use.
The app keeps the last session, saved uploaded books, reading progress and per-book familiarity cache in browser storage. That makes reopen faster while keeping the main reading flow client-side.
Ninja Reader can be installed as a PWA. After the first successful online visit, the app shell and local parser libraries are cached, so saved books can be reopened offline.
The app is suitable for books, articles, notes and long-form reading when you want faster visual pacing, reduced distraction and more control over reading tempo.
The interactive app lives at https://ninjareader.ru/. This page exists as an indexable English landing page for search engines, crawlers and multilingual discovery.
Yes. Ninja Reader supports TXT, PDF, DOCX and EPUB and extracts plain text locally in the browser before the reading flow starts.
The core reading workflow runs in the browser. Reading progress, saved books and the per-book word cache are stored in browser storage for faster reopening.
Yes. Ninja Reader ships with a PWA manifest and service worker, so compatible browsers can offer install or add-to-home-screen behavior.
After the app has been loaded online once, the shell and parser assets are cached and previously saved books can reopen offline from IndexedDB.