Thomas Karner
My own products, open source, and projects from my professional work.
PDF/A library for Go
Go library and CLI for validating and converting PDF/A-1b documents – zero runtime dependencies, also available as WebAssembly. Dual-licensed: AGPL 3.0 or a commercial licence for closed-source use.
Read the case study →Match documents
Web application for comparing documents for matching patterns.
Review documents together
Web application for viewing PDF documents together in real time – no screen sharing or installation needed.
High-security digital archive
Secure, fully digital management of certified deeds for the Austrian notary profession.
Displaying and storing receipts
A sustainable alternative to paper receipts: API and web app for displaying and storing receipts.
Tamper-proof transactions
Cloud-based solutions for securely recording and logging cash register sales in Austria and Germany.
In a free initial call we clarify what you need and how I can help – no strings attached.