PDF Protect — Add Password Free
Real RC4-128 encryption — streams and strings both encrypted per PDF spec. Your files never leave your device.
Drag & drop a PDF here, or click to browse
PDF only · up to 50 MB
🪄 How to Password Protect a PDF
Upload PDF
Drag & drop or click to select any PDF up to 50 MB.
Set User Password
Enter and confirm a password (min 4 chars) that anyone must enter to open the file.
Set Permissions
Toggle disable printing, copying, or editing. These restrictions are encoded in the PDF's /P bitmask.
Protect & Download
Click Protect PDF. RC4-128 encryption is applied entirely in your browser. Save your password immediately after downloading.
❓ Frequently Asked Questions
Q: Is this PDF password tool free?
Yes, completely free. No signup, no limits, no hidden charges.
Q: Are my files uploaded to any server?
No. Encryption runs entirely in your browser using JavaScript. Your PDF never leaves your device at any point.
Q: What encryption does EzSeva use?
EzSeva uses RC4-128 bit encryption (PDF Standard Security Handler, Revision 3). Both content streams and metadata strings are encrypted per PDF spec Algorithms 1, 3, 5, and 6. Compatible with Adobe Reader, Chrome PDF viewer, iOS Files, and all major PDF readers.
Q: What is the difference between User and Owner password?
The User Password is required to open the PDF. The Owner Password controls permissions — it must be entered to change restrictions on printing, copying, or editing in strict PDF viewers.
Q: Do the permission restrictions actually work?
Yes. Print, copy, and edit restrictions are encoded in the PDF's /P permission bitmask (Table 22, PDF 1.7 spec) and tied to the encryption key. Adobe Reader, iOS Files, and Chrome PDF enforce these correctly. Basic viewers may ignore them.
Q: What if I forget the password?
EzSeva does not store passwords anywhere. If you forget the user password, the PDF cannot be opened by anyone — including us. Always save your password in a secure place immediately after downloading the protected file.