Sending a confidential PDF by email? Adding a password ensures only the intended recipient can open it. Adobe Acrobat Pro charges $239/year for this feature. EditDocs AI does it free, in any browser, with AES-256 encryption — the same standard used by banks.
How to add a password to a PDF free
- 1Open the protect toolGo to editdocsai.com/tools/protect-pdf. No account or sign-in required.
- 2Upload your PDFUpload the PDF you want to password protect. Up to 50MB supported.
- 3Set your passwordEnter a strong password. We recommend 12+ characters mixing letters, numbers, and symbols. This is the password recipients will need to open the file.
- 4Download the protected PDFYour PDF is encrypted with AES-256. The original file is deleted from our servers within 60 minutes. Share the protected PDF — and send the password separately (not in the same email).
What encryption does the password protection use?
EditDocs AI uses AES-256 encryption — the strongest available PDF encryption standard. AES-256 is used by governments, militaries, and banks for classified data. A brute-force attack on AES-256 would take longer than the age of the universe with current computing technology. Your PDF is protected as securely as any enterprise document management system, for free.
Password protection vs permissions restrictions — what's the difference?
Open password: prevents the PDF from opening without a password. Anyone who wants to view the file must enter it. Permissions password (owner password): lets anyone open the PDF but restricts what they can do — printing, copying text, or editing can each be disabled independently. You can use both together: require a password to open, and also restrict copying once inside. EditDocs AI supports both types.
Try it free — no account needed, no watermarks, files deleted in 60 minutes.
Password Protect PDF Free →