TinyInvoice — Australian tax invoice maker for sole traders (offline HTML)

Offline Australian tax invoices for GST-registered sole traders. Seller details, line items (GST included / added / free), Tax Invoice heading when GST applies, A4 print/PDF, and a TinyBAS-compatible CSV export. Worksheet only — not tax advice, not an ATO product. A$12.

A calm, single-file invoice app that lives on your computer. Double-click the HTML, fill in the sale, print or Save as PDF. When GST is charged, the document says Tax Invoice. When it is not, it says Invoice. Built for the same people as TinyBAS: Australian GST-registered sole traders on Simpler BAS who issue a few invoices a quarter and want something offline, with no subscription and no cloud.

What's included: tinyinvoice.html — the whole product, works from file://; README.txt — how to use it, GST treatments, TinyBAS CSV, disclaimer. All data stays in your browser (localStorage). JSON backup / restore is built in.

What you can do: seller name, ABN, address, email, optional payment line (PayID / BSB); buyer name and optional buyer ABN; auto-increment invoice numbers; issue and due dates; line items with GST treatment (included / added / free); live A4 preview with GST-ex, GST and GST-inc totals; print / Save as PDF; export or copy a TinyBAS-compatible CSV (date,type,description,amount,tax); saved invoice history, duplicate, delete, Backup JSON.

What it is not: TinyInvoice is not a lodgement tool and does not talk to the ATO. It is not tax advice and not an ATO product. It is not Xero, MYOB, QuickBooks or a full accounting system. It does not decide whether a supply is taxable — you do. It will not email the client for you; you print/PDF and send it yourself.

Instant download. No refunds on digital files once downloaded, except where the file will not open — contact me and I will replace it. TinyInvoice is a worksheet and invoice template, not tax advice and not an ATO product. Check figures and wording before you send.