If you've ever had to merge a few PDFs, stamp a "CONFIDENTIAL" watermark, or turn a stack of images into a single PDF on the server , you know the pain: pdf-lib , pdftk , ghostscript , native binaries that won't install on your host, and an afternoon gone. Here's a lighter option: a small HTTP API that does the common PDF jobs for you. You POST a file, you get a PDF back. No dependencies, no native build steps, works from any language. I'll show merge, watermark, and images-to-PDF w...