PDF Studio — Free, fast, client-side PDF tools. Merge, split, compress, convert, and edit PDFs directly PDF Studio is a free, browser-based PDF toolkit designed to simplify document management. Merge, split, compress, convert, edit, sign, protect, unlock, repair, and OCR PDFs without installing software. Built for students, professionals, businesses, and anyone who needs fast, secure, and privacy-focused PDF tools that work directly in the browser.in your browser. No uploads. No sign-up.