A self-contained offline invoice builder. No setup, package installation, account, online fonts or CDN is required.

Enter invoice and client details, add line items, and review the live preview. Quantities support three decimal places; rates support two. USD, EUR, GBP, CAD and AUD use two decimal minor units.

Save JSON locally before closing or reloading. Import validates the file before replacing the current draft. Print / Save PDF opens your browser print flow; pagination, paper and output settings are controlled by your browser.

Calculations use integer minor units, round half-up, apply discount before tax, and reject invalid or overflowing values. Read README.md for exact calculation limits, JSON schema and print notes.

This is a drafting tool, not a hosted client portal. It does not send invoices, collect payments, reconcile transactions, convert currencies or determine tax compliance. No autosave. Inspect every invoice before issuing it.