Readkave reads EPUB, MOBI, AZW3, FB2 and CBZ books in Chrome. Your books stay on your computer.
.epub file → Open with → Choose another app → Choose an app on your PC → pick chrome.exe → Always.Tip: pin Readkave to the toolbar (the puzzle-piece icon → the pin) so the library is one click away.
Books with DRM (Adobe DRM, Readium LCP) can only be read in the app or store they came from. Readkave can't open them and doesn't try to remove the protection. Books bought without DRM, public-domain books and your own files open fine.
The file is damaged or isn't an ebook Readkave knows. Download it again, or convert it to EPUB with a tool such as Calibre.
Read aloud uses the voices of your browser and computer; Readkave lists voices for the book's language first. To add a language on Windows: Settings → Time & language → Speech → Add voices, then restart Chrome. On a Mac: System Settings → Accessibility → Spoken Content → System voice → Manage Voices. Microsoft Edge has many natural voices built in. Some languages (for example Uzbek) have no voice on any system yet.
Translation runs on your computer with Chrome's built-in translator. The first time you translate into a language, Chrome downloads a language pack, which needs an internet connection; after that it works offline. For languages Chrome can't translate yet, the card offers Open in Google Translate.
In your browser's own storage on this computer, nothing is uploaded. Highlights, notes and bookmarks can be downloaded as a text file from the Notes tab in the reader. Removing the extension deletes everything; so does Library → Settings → Delete all books and data.
In the reader press ? for the full list. The most useful: ← → turn pages, Ctrl+F search, Ctrl+B contents, B bookmark, L read aloud, F fullscreen, Alt+← back after a jump.
Email hello@readkave.com. Please say which book format and which Chrome version you use.