Jotdown

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