Quick answer
Offline PDF reader with OCR and academic annotations.
Jotdown is an open-source document manager and PDF reader built for researchers, students and academics. Reading, annotating and organizing your documents works fully offline; network is only used for optional DOI citation import and dictionary downloads. Focused on privacy — no account required, no data leaves the device beyond what those optional features need.
Features: * PDF reader with text-layer extraction * OCR via open-source PdfBox * Sticky note annotations and vector drawings (stylus + palm rejection) * Academic citation (fichamento) generator * Export to Markdown (.md), TXT and PDF * ABNT citation format support * Local folder organisation system * Offline dictionary (Portuguese / English) * Backup and restore (local ZIP) * Dark mode support
How to install
- Download the APK from the button at the top of this page.
- Allow “Install unknown apps” for your browser or file manager only, not for every app.
- Open the downloaded file and confirm the installation.
- If installation fails with “App not installed,” remove an earlier build of the same app first. A signature conflict is the usual cause.
Data safety
- Every file is checked against its published SHA-256 before it is listed.
- Files are scanned for malware on every update.
- The permissions each app requests are listed on its own page.
- Read the full safety policy for how we test, flag, and delist files.
Frequently asked questions
What is Jotdown?
Offline PDF reader with OCR and academic annotations.
Who develops Jotdown?
Jotdown is developed by Walter Rebouças.
Which Android version does Jotdown require?
Jotdown requires Android API 26 or later.
What is the current version of Jotdown?
The synchronized F-Droid version is 3.1.20-FOSS.
Which license does Jotdown use?
The signed F-Droid metadata lists GPL-3.0-or-later.
Where is the source code for Jotdown?
https://github.com/walterfr/jotdown-android
Comments
Recent approved comments · sorted by newest
View all comments