There are two common ways to deliver an invoice: a downloadable PDF, or an interactive online invoice link. Each has real advantages depending on your business.
PDF invoices: the case for them
PDFs are universally readable, easy to attach to an email, simple to archive, and require no ongoing platform or subscription. They're also ideal when privacy matters — a PDF generated entirely in your browser, with no backend server, never has your client's data pass through a third party.
PDF invoices: the tradeoffs
They're static — clients can't pay directly from the document itself, and any correction requires generating and resending a new file.
Online invoices: the case for them
Interactive invoice links often include a 'Pay Now' button, automatic payment status tracking, and reminders. This can be convenient for businesses issuing high volumes of invoices to clients who prefer one-click payment.
Online invoices: the tradeoffs
They typically require a subscription platform, often store client data on a third-party server, and can feel less personal or portable than a clean PDF attached to an email.
Which should you choose?
For freelancers and small businesses that value privacy, simplicity, and zero ongoing cost, a well-designed PDF invoice remains a strong default — especially when generated through a free, no-database tool that still looks professional. Larger operations with high invoice volume may benefit more from an online system with built-in payment tracking.
A hybrid approach
Many freelancers use both: a polished PDF invoice for the official record and client communication, alongside a payment link (PayPal, Stripe, Wise) in the notes section for convenience.