Password protect PDF

Upload a PDF and set a new open password (at least 4 characters). The download is encrypted with AES-256. If the PDF is already locked, enter its current password first.

Limits: up to 20 files, 15MB per PDF, 10MB per image, 25MB total, up to 200 pages per PDF.

Drag & drop files here, or browse

About this tool

Upload a PDF and set a new open password (at least 4 characters). The download is encrypted with AES-256. If the PDF is already locked, enter its current password first. PDF Tool Hub is completely free to use: no sign‑up, no email address, no subscription, and nothing else required. Just open a tool and go. We do not store your files or personal data, do not use tracking cookies, and process files only temporarily on our servers. We do not send your files to third parties.

FAQ

Can I remove the password later?

Use our Unlock PDF tool with the same password to create an unencrypted copy.

Is this the same as digital signing?

No. This only sets an open password so viewers need the password to read the file.