Protect PDF
Add a password to open the document and restrict printing or copying. Real AES encryption runs through your own server API — the tool tells you honestly what it can and cannot do.
How to use Protect PDF
- Select or drag your file into the upload box.
- Set the options you need (order, quality, format, position).
- Press the action button and download your result.
Your file is never uploaded to a server. Protect PDF runs inside your browser with JavaScript, so your document stays private.
Frequently asked questions
Is Protect PDF free?
Yes — completely free, with no watermark and no daily limit for normal file sizes.
Are my files safe?
For the tools that run locally, all processing happens inside your own browser. Files are never uploaded to our servers.
Does it work on my phone?
Yes. Every PDFMint tool works on phones, tablets and desktop computers with a modern browser.
What is the maximum file size?
Up to 100 MB per file and 300 MB in total, depending on your device memory.