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The original was posted on /r/opensource by /u/Piratuks on 2026-01-10 10:17:27+00:00.

I was looking for a simple invoicing / quoting tool that:

  • works fully offline

  • doesn’t require an account

  • keeps all data local

  • is open source

Most tools I tried were cloud-based or locked useful features behind subscriptions,

so I decided to build my own: **Invoice Builder**.

It’s a desktop app for freelancers and small businesses.

  • Runs fully offline

  • Uses a local SQLite database

  • No accounts, no cloud, no subscriptions

  • MacOS, Windows & Linux builds available

Screenshots:

imgur.com/…/invoice-builder-offline-invoicing-app…

GitHub: github.com/piratuks/invoice-builder

Main features:

  • Invoices & quotes with PDF generation

  • Multi-currency, taxes, discounts, partial payments

  • Full data export (JSON, XLSX) + backup/restore

  • Light/dark mode

This is an early public release and I’d really appreciate feedback from people who care about self-hosting and data ownership.

Thanks for taking a look!