InvoiceNumberGenerator

Finance

A free web tool that creates sequential, collision‑free invoice numbers and lets you download PDFs instantly.

by 李鑫

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Invoice Number Generator is a free web tool that lets users create an invoice without signing up. Choose a template, set the invoice number, and download a PDF directly in the browser. The generator automatically produces standardized, collision‑free numbers using customizable prefixes, date tokens and a sequential counter. Users can select formats that reset yearly, monthly, or never, and the tool zero‑pads sequences for proper sorting. When you download the PDF or save the invoice, the number is locked and the local counter advances, preventing duplicate numbers on the same device. If a collision is detected, the editor flags it immediately, helping freelancers, contractors and agencies keep a clean audit trail. Paid plans remove the small footer credit on PDFs and offer additional features, while the free version includes a watermark‑free PDF with a credit line. Support is available via email and a 7‑day refund policy applies to paid plans.

// launched on CLAPSTORM — a free Product Hunt alternative with a level weekly round · Finance