Legacy Databases & Spreadsheets Modernization

Many organizations still depend on aging Microsoft Access databases and intricate Excel spreadsheets for critical business processes. These tools become fragile, hard to maintain, and pose security/compliance risks as they grow. Zwiegnet specializes in rewriting and upgrading these legacy systems into modern, custom-developed web applications running on secure Linux infrastructure.

We transform your existing solutions with:

• Microsoft Access Database Rewriting – Full analysis of forms, queries, reports, VBA macros, and relationships; recreation as a robust web application with proper database backend (PostgreSQL/MySQL).
• Excel Spreadsheet Upgrades – Conversion of complex formulas, pivot tables, VBA macros, and multi-user workbooks into centralized, browser-based applications with real-time collaboration.
• Custom Web Application Development – Secure, responsive interfaces using modern frameworks; multi-user access, role-based permissions, audit trails, and data validation.
• Data Migration & Integrity – Safe extraction and import of existing data, cleanup, normalization, and verification to ensure no loss or corruption.
• Feature Enhancement – Adding reporting dashboards, automated workflows, email notifications, API integrations, and mobile access — going beyond original capabilities.
• Security & Compliance – Encrypted connections, user authentication (LDAP/AD), input sanitization, backup strategies, and support for regulatory requirements.
• Deployment Options – On-premises Linux servers, cloud hosting, or hybrid — with easy updates and minimal downtime.
• User Training & Documentation – Intuitive interfaces that mirror familiar Access/Excel workflows, plus comprehensive training and documentation.
• Parallel Operation & Cutover – Running new and old systems side-by-side during transition for seamless adoption.
• Ongoing Support – Maintenance, enhancements, and integration with other business systems.

Benefits include eliminated single-point-of-failure risks, true multi-user concurrent access, version control, automatic backups, and freedom from Microsoft licensing constraints.

Located between Madison and Milwaukee, Wisconsin since 2009 — direct, personal service with proven experience modernizing decades-old Access and Excel solutions into reliable custom applications.