About PDF Toolkit

PDF Toolkit is a free collection of PDF tools that run directly in your browser. Merge, split, compress, rotate, watermark, sign, and convert PDFs without uploading a single byte to a server.

Why we built this

Most online PDF tools require you to upload your files to a remote server. That means your tax returns, contracts, medical records, and business documents pass through someone else's infrastructure. We thought that was unnecessary for the vast majority of PDF operations.

Modern browsers have all the APIs needed to manipulate PDFs client-side: ArrayBuffer for binary data, Canvas for rendering, Web Workers for background processing. We built PDF Toolkit on top of those capabilities so your files never leave your device.

How it works

Every tool marked “Browser-only” processes your files entirely in JavaScript using pdf-lib and PDF.js. No network request is made. You can disconnect from the internet after the page loads and the tools will still work.

A small number of tools — OCR, Word/PDF conversion, and heavy compression — require server-side processing because the underlying libraries (Tesseract, LibreOffice, Ghostscript) don't run in browsers. For those tools, files are sent to our API over an encrypted connection, processed, and deleted immediately after the result is returned. We never store your files.

Open source

The site is built with Next.js and Tailwind CSS. We believe transparency is the best privacy policy — if you want to verify that your files stay local, you can read the source code yourself.

Contact

Questions, feedback, or bug reports? Reach us at [email protected].