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Free, no-signup instant invoice generator with multi-currency and a developer API.
Invoice-Generator.com (by Invoiced) is a free browser tool that creates professional invoices instantly with no signup required, supporting 150+ currencies, tax, shipping and discount fields, and credit note, quote, and purchase order templates. It also offers a developer API and optional account-based invoice history.
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<a href="https://aifinancetools.co/item/invoice-generator" target="_blank" rel="noopener"><img src="https://aifinancetools.co/api/badge/invoice-generator?theme=light" alt="Featured on AI Finance Tools" width="200" height="60" /></a>Invoice-Generator.com is a free, no-friction tool for anyone who needs a professional invoice right now without creating an account. You fill in a simple form, add tax, shipping, or discount lines, choose from more than 150 currencies, and download a clean PDF in one click. It also provides credit note, quote, and purchase order templates, plus a developer API for teams that want to generate invoices programmatically.
Its strength is obvious: it is genuinely free and instant, with no watermark gymnastics or signup wall for basic use, which makes it ideal for occasional invoicing, quick one-offs, or testing invoice formats. Creating an account adds saved invoice history, and the tool is backed by Invoiced, whose broader accounts-receivable platform is the paid upsell path.
The honest limitation is scope. This is a generator, not a business system: there is no client management, recurring billing, payment tracking, or bookkeeping in the free tool itself, so anyone invoicing regularly will need to move to a fuller platform. There are no published consumer subscription tiers for the generator, since monetization runs through the separate Invoiced product and the API. It fits occasional invoicers and developers; it is a weaker fit for ongoing, relationship-based billing workflows.