our one rule: your files stay yours

PDF tools that can’t spy on you.

Most “free” PDF sites upload your documents to their servers. PDFIntro was built on the opposite premise: the work happens on your device, so privacy isn’t a promise — it’s the architecture.

The problem with uploading

When you upload a contract, medical record or tax form to a web tool, you’re trusting an unknown server with sensitive data. PDFIntro removes that trust requirement entirely. Files are opened with the browser’s File API and processed using WebAssembly libraries that run inside your tab.

How we built it

The engine combines battle-tested open-source libraries for reading, rendering and writing PDFs, all executed client-side. There is no upload endpoint because there is no server that touches your documents.

What that gets you

Nothing is uploaded

Every operation runs in your browser using WebAssembly and JavaScript. Your documents are never transmitted to a server.

No accounts, no queues

There is no backend to wait on. Open a tool, drop a file, get a result — instantly, offline-capable after first load.

Genuinely fast

Because there is no round-trip to a server, most operations finish in the time it takes to read this sentence.

The flow

Pick a tool

Choose from organise, convert, edit and optimise tools — or hit ⌘K to jump straight there.

Drop your file

Drag a PDF or image in. It loads into memory on your device, never to a server.

Download

The result is generated locally and saved straight to your downloads folder.

Try the tools Get in touch