Watermarking a PDF — adding semi-transparent text over pages — sounds like something only desktop software handles. But with pdf-lib and a bit of canvas math, you can build a fully browser-based watermark tool. This post walks through the implementation details, including text rendering, rotati...
Source: [Dev.to](https://dev.to/sunshey/how-to-add-watermarks-to-pdfs-in-the-browser-with-vue-3-and-pdf-lib-3k4n)