Fully offline
Work without an internet connection. TSD apps are designed to run locally so you stay productive anywhere.
Windows desktop • Offline-first • Open-source
TSD App Collection
Modern, offline-first Windows applications for productivity and creativity.
Apps showcase
Discover productivity and creativity tools built to run fast, locally, and without trackers.
Featured app
PDFChhiana
PDFChhiana (where Chhiana means “Forge” in the Mara language) is a free and open-source Windows desktop application designed to forge PDFs into clean, consistent, and professional documents.
It allows you to merge PDFs, edit pages, and normalize page sizes for printing or sharing — all while working fully offline on your own machine.
- Merge multiple PDF files into a single, organized document
- Edit pages — remove, duplicate, or reorder without touching the cloud
- Normalize page sizes for predictable printing and clean exports
- Runs fully offline for privacy-friendly, local-only workflows
Why TSD Apps
Software that respects your time, your device, and your privacy.
Open-source
Built in the open, with source code available for review, contribution, and long-term maintainability.
Privacy-friendly
No trackers, invasive telemetry, or adware. Your documents and activity stay on your machine.
Lightweight & fast
Optimized for performance with small installers and responsive UIs that feel native on Windows.
About TSD Apps
TSD builds tools that make it easier for people and organizations to work effectively in low-connectivity environments. We focus on practical, offline-first software that is simple to deploy, transparent by design, and sustainable over the long term.