About PDF Fluid

PDF is the most widely used document format in the world, yet most people only notice it when something goes wrong: the file is too big to email, the text won't copy, the form won't save, or the password is lost.

PDF Fluid exists to fix that. Every guide starts with a short, direct answer, then explains why the problem happens and walks through solutions for Windows, Mac, phones and the browser — favouring free and built-in tools first.

Our principles

• Answer first. No long intros. The fix is at the top.
• Explain the cause. Understanding how PDFs work helps you avoid the problem next time.
• Free and built-in first. Most PDF tasks don't need paid software.
• Privacy-minded. We flag when an online tool uploads your file, and suggest local alternatives for sensitive documents.

Coming soon

We're building free PDF tools that run entirely in your browser, so your files never leave your device.