Invoice Toolkit is a browser based document creation tool for preparing invoices and related business documents. Users can enter business and client details, document numbers and dates, currency, payment terms, line items, taxes, discounts, shipping charges, and payment instructions. A live preview displays the document as it is edited. The tool supports invoices, estimates, and receipts, as well as payment reminders and a checker for missing fields. Users can choose a template, set brand colors, and upload a logo. Completed documents can be downloaded as PDF files formatted for A4 pages. Invoice Toolkit runs in a web browser and does not require an account or subscription. Drafts remain on the user’s device. A typical workflow is to create an estimate or invoice, review the document, download it, and send a payment reminder when needed.