How the page numbering works
The tool draws page numbers directly onto your existing PDF in the browser. When you upload a file, you choose a position — bottom or top, left, centre or right — and a format, whether that is a plain number, a "Page X of Y" count, or a centred dash style. Receipt Caker then writes the number onto every page at the spot you picked, without altering the content beneath it, and builds a new file for you to download. You can also set the starting number, so a section of a larger pack can begin at the right figure.
Everything happens locally. The PDF is read and re-saved on your own device with no upload, so the numbered file is ready the instant you ask for it. Because the numbers are placed in the margin over the top of each page, the underlying receipt or invoice stays untouched — you are adding a label, not re-rendering the document.