xournalpp/xournalpp

Xournal++ is a handwriting notetaking software with PDF annotation support written in C++ using GTK3, running on Linux, macOS, and Windows with support for pressure-sensitive styluses and digital pen tablets.

The tool addresses the need for a flexible, functional, and fast digital note-taking environment that bridges handwriting and document annotation. It works by providing a canvas for freehand drawing and note-taking while simultaneously allowing users to layer annotations directly onto PDF documents. The software recognizes pressure sensitivity from devices like Wacom and Huion tablets, enabling natural pen input. Beyond basic note-taking, it includes stroke recognition, shape drawing with tools like set-squares and compasses, text insertion with LaTeX support, and the ability to select and manipulate content from underlying PDFs including following links and copying text.

Xournal++ suits developers and users seeking a cross-platform alternative to proprietary note-taking applications that combines handwriting capture with serious PDF work. It is particularly valuable for those using Linux or requiring tablet support, as many commercial alternatives lack equivalent Linux implementations. The tool's extensive feature set—including layers, customizable toolbars, audio recording alongside notes, export to multiple formats, and Lua plugin scripting—makes it suitable for academic work, technical documentation, and creative projects. The software distinguishes itself through its emphasis on keyboard and stylus customization, allowing users to map different tools and colors to device buttons.

The project maintains active engagement with its user community through translation contributions coordinated via Crowdin, with translators able to propose new languages through discussion channels or issue creation. Development activity shows responsiveness to feature requests and bug reports, with the codebase receiving ongoing refinement for stability and performance across its supported platforms.