Add a password to a PDF, free, without uploading
Lock a PDF with a password before you email it, in your browser. The PDF app supports encryption up to AES-256.
How to do it
- Upload the PDF in Files and open it in the PDF app.
- Open the security settings and set a password.
- Save and download the protected file.
- Send the password a different way from the file.
Why do it here
Uploading a file to lock it defeats the point. The PDF opens in the PDF app inside Madosuite’s Linux machine, in your browser. It is not uploaded to us, which matters for contracts, medical letters and anything with a signature on it.
Limits today
- The PDF app is alpha. Open the protected file once to check the password works.
Questions
Which encryption does it use?
The PDF app supports the standard PDF security handler, from RC4 40-bit up to AES-256.
Can it open a protected PDF?
Yes, with the password. A restricted document shows a notice, and the restrictions lift when you enter the owner password.
Is my PDF uploaded?
Uploading a file to lock it defeats the point. The PDF opens in the PDF app inside Madosuite’s Linux machine, in your browser. It is not uploaded to us, which matters for contracts, medical letters and anything with a signature on it.
Is Madosuite free?
Yes. The apps run on your own device, in the browser tab, so there is no server time to pay for. There is no trial period.
Other PDF jobs
Remove names, numbers and addresses from a PDF before you share it, and sanitize the file, in your browser. The document never leaves your device.
Edit a PDF’s title, author and keywordsChange the title, author, subject and keywords stored in a PDF, and see its fonts and security settings.
Merge PDF files free, without uploading themCombine any number of PDFs into one file in your browser. Each file becomes a bookmark, with its own bookmarks nested underneath, and links and form fields keep working.