KJ Invoice exists because getting paid shouldn't require signing up for another SaaS tool, handing over your client list, or paying a monthly fee to format a document.
Most invoice tools are built backwards: they ask you to create an account, store your client data on their servers, and lock the good features behind a subscription — all to generate a document you could format yourself in five minutes with the right tool.
KJ Invoice flips that. It's a completely front-end invoice generator — built with plain HTML, CSS, and JavaScript — that runs entirely inside your browser. There's no backend, no database, and nothing about your business or your clients is ever sent anywhere. You fill in a form, watch your invoice build itself in real time, and export it as a polished PDF the moment it's ready.
We built this for the people who send invoices constantly but don't want invoicing software running their business: freelance designers and developers, consultants, small agencies, tutors, photographers, and independent contractors who need something fast, professional, and private.
Three things: speed, since there's no login wall between you and a finished invoice; privacy, since nothing you type is stored or transmitted; and design, since we treat an invoice as a piece of communication with your client, not just a spreadsheet printed to PDF.
We're continuing to build out free resources on invoicing, freelance pricing, and small business finance in our blog, alongside small improvements to the generator itself based on how people actually use it.