OpenBook

An open-source notebook for anything and everything.

Simple and straightforward

What you see is what you get.

Press “/” for a callout, a table or a code fence. Drag one beside another to make columns.

Notes that grow and change with you.

Move the months slider to redraw four growth curves.

Made for sharing

An OpenBook account is required to publish a library on book.cloud. This allows us to detect abuse and prevent fraud.

Coffee notes · OpenBook

Coffee notes

book.cloud

Pages live on your device. Works even without internet.

Edits land in a local database first.

You can keep working on a plane or in a dead zone.

OpenBook's source is open for anyone to read, fork and run. Run it locally, or self-host the whole stack. No account required to get started.