A .mobi book sits in Drive as a file name and a grey square. One right click later it is a book, with chapters, a cover and the line you stopped on.
Free. No account to create. The book stays on your machine.
The book joins your library the moment it opens, so the next evening you carry on where the chapter broke off.
MOBI is the Kindle style format, and almost nothing on a modern machine will touch it. Double click it and Windows offers to go shopping for an app, Drive shows the name and a grey square, and every guide tells you to convert the book into something else first.
This one reads the file the way it is. No converter to install, no second copy of your library in a format you never chose, nothing sent to a stranger's server on the way.
Google hands over that single file and nothing more. The permission behind Open with covers the books you open with this app, so the rest of your Drive stays out of sight, and the original is read but never written to.
What lands in the tab is a copy, held in this browser on this machine. No account, no sync, no server of ours anywhere in the picture.
A .mobi you downloaded, made yourself or bought without protection opens straight away. A book bought inside the Amazon store carries DRM and stays locked to the app it was sold for, and no reader in a browser tab can change that. Better to know it before you try than after.
Every book you open gets a cover, a place on the shelf and a quiet note of how far you got. Remove one by mistake and Trash holds it for 30 days.
Page numbers hold their ground. A page here is a fixed piece of text, so a larger font gives you larger letters and leaves page 59 exactly where it was.
Four light themes for the day and four dark ones after it, with warmth and brightness dials for late reading. Six typefaces ship with it, Literata and Atkinson Hyperlegible among them, next to line spacing, page width and justify.
The header counts the minutes left in this chapter instead of a vague percent, a thin line across the screen marks every chapter with a diamond, and search runs through the whole book at once.
Install MOBI Reader once, then right click the book, choose Open with and pick it from the menu. Drive passes over that one file and it opens in a new tab. Nothing is downloaded to your desktop and nothing is converted on the way.
No. The book is read in the format it already has. Converting leaves you with two copies of every book, and the second one is usually the worse of the pair.
No. Those files carry DRM and stay inside the app they were sold for. A DRM free .mobi, the kind you download or make yourself, opens with no fuss at all.
Only the ones you hand it through Open with. That single permission covers the books you opened with this app, and the rest of your Drive is invisible to it.
No. It travels from Google straight into your browser and stops there, in local storage on this machine. There is nothing to sign up for and nothing collected about you.
Yes to both. It is a page, so Windows, Mac and ChromeOS get the same reader, and once a book has landed it opens with no connection at all. Fetching a new one from Drive is the only step that needs the network.
MOBI is the format this app registers in Google Drive™, and AZW3 sits right beside it: drop either onto the shelf and it opens. So do EPUB and FB2, plain or zipped, along with plain text, Markdown and Word documents. PDF and comics are not supported.
Yes. No ads, no chapter behind a payment, no trial counting down. Six classics are already on the shelf if you want to try it on a book you do not have yet.
That .mobi has been sitting in Drive since the day you saved it. Give it a page built for reading.
Google Drive™ and Google Workspace™ are trademarks of Google LLC.