Small Business OS – Offline Freelancer Business System in a Single HTML File

Summary: Small Business OS is a fully offline freelancer business system contained in a single HTML file that manages invoices, quotes, clients, expenses, dashboards, and PDF generation locally in the browser without backend or cloud dependencies.

What it does

It operates entirely offline in the browser, supporting multi-currency, branding customization, and backup/restore features while handling core freelancer business tasks and exporting PDFs.

Who it's for

It is designed for solo freelancers seeking control, privacy, and a subscription-free alternative to cloud-based tools.

Why it matters

It prevents data lock-in and dependency on cloud services, ensuring business software remains accessible without ongoing fees or external servers.