Hi PH. I built CoolPDF after watching a colleague upload our company's draft contract to an online merger. Two pages needed, the whole contract uploaded. The idea is simple: every online PDF tool asks you to upload your file first. CoolPDF does the opposite — it brings the processing to your file. All 20 tools (merge, split, compress, sign, HEIC → PDF, PDF → Markdown and more) run 100% in your browser via WebAssembly. There is no backend at all. And you don't have to take our word for it: load a page, switch off your Wi-Fi, and every tool still works. Or open DevTools → Network and watch zero file bytes go out. The whole codebase is open source (AGPL-3.0): https://github.com/Jimsnote/coolpdf Would love your feedback — and tell us which tool we should build next!

CoolPDF

Free PDF tools that never upload your files

Free PDF tools that never upload your files