About PDFNinja
Free, fast, and private PDF tools that work entirely in your browser.
Our Mission
PDFNinja was built with a simple belief: working with PDF files should be free, fast, and private. Too many online PDF tools require you to upload sensitive documents to remote servers, creating unnecessary privacy risks. We took a different approach.
Every PDFNinja tool processes your files entirely within your web browser using modern WebAssembly and JavaScript technologies. Your documents never leave your device — no uploads, no cloud storage, no third-party access. This makes PDFNinja the most private way to work with PDFs online.
What We Offer
PDFNinja provides a comprehensive suite of 17 PDF tools covering everything you need:
Organize
Merge, split, extract, delete, and rotate PDF pages.
Convert
PDF to Word, Excel, Image, and Word/Image to PDF.
Edit
Add text, watermarks, page numbers, and crop margins.
Security
Password-protect and unlock PDF files.
Privacy First
No Server Uploads
Files are processed locally in your browser using client-side JavaScript and WebAssembly.
Your Data Stays Yours
We never see, store, or have access to your documents. Period.
Instant Processing
No upload/download wait times. Processing happens at the speed of your device.
Works Offline
Once the page loads, tools work even without an internet connection.
Technology
PDFNinja is built with modern web technologies including Next.js, React, and established open-source libraries like pdf-lib and PDF.js. These libraries enable full PDF manipulation directly in the browser without any server-side processing, ensuring maximum performance and privacy.