Invoiceize is a free web-based invoice generator that creates PDF invoices through a live preview interface. Users enter business and client details, line items, dates, invoice numbers, taxes, discounts, shipping, and payment notes in a form on the left while the finished invoice updates on the right. Text on the preview can be edited in place, and the form and preview remain synchronized. The tool calculates line totals, subtotal, and balance due, supports any ISO currency code with currency-specific decimal rounding, and allows tax or discounts as either percentages or fixed amounts. A deposit can be recorded under amount paid to update the balance due. Invoices can include an automatically incrementing invoice number, issue and due dates, both parties' details, quantity and rate line items, totals, and payment notes. Users can choose from Classic, Modern, and Minimal templates, set a brand color and heading font, and upload a logo. The Brand Kit stores logo, color, business details, and payment information so new invoices start with those details. Completed invoices can be downloaded as PDFs without a watermark on US Letter or A4, or printed directly from the page. Long invoices break across pages between rows rather than through a row. Line items can be copied from Excel or Google Sheets and pasted into a description field, with each row becoming a separate line and quantity and rate split into columns. No signup is required to download an invoice. Drafts save automatically in the browser, and past invoices can be reopened, duplicated, or deleted from My invoices. An optional login enables cloud storage and access across devices. Invoiceize is intended for freelancers, independent contractors, and small businesses that send a small number of invoices per month and do not need full accounting software. The workflow is to fill in who and what, select a template and branding, then download, email, or print the PDF. The site also lists downloaded invoices, receipts, quotes, and pay stubs in a tools area.