What's the difference between Personal and Studio?

Personal ($39) is for one person — unlimited use on one active device at a time. Activate on a new device and the old one signs out. Studio ($199) is for teams and commercial client work — unlimited team members, early access to new tools, and a commercial license.

Do I need an account?

No. Use any tool free up to 5 times per day on compute-heavier tools, and unlimited on lightweight ones. No card, no account, no signup required.

Where are my files processed?

Right on your device. Files never upload to any server. Everything runs in your browser — you can verify in DevTools → Network.

What happens if I use my Personal license on a second device?

The new device activates and the old device signs out. Your license key stays the same — you just move it between devices as needed. No limit on how often you switch.

Does this work on my phone?

Yes. Every tool works on iPhone, Android, tablet, and desktop.

What if I want a refund?

30-day money-back guarantee on both tiers. No questions asked. Email sales@cipherforces.com.

Will you add more tools?

Yes. New tools ship regularly. Your license includes every tool we ever release — Studio members get early access.

Pdf

Password Protect PDF

Add a password to lock your PDF.

By Daniel BeglaryanUpdated August 2026

PrivateWorks OfflineNo Account

100% Private Works Offline AES-256

Drop your PDFs here

or click to browse

PDF

Max 100MB

Protect your PDFs

Add a password and control who can print, copy, or edit. Everything stays on your device.

0/5free today

Deep dive

About Password Protect PDF.

Encrypt Any PDF With a Password

Drop a PDF, set a password, choose the permissions (allow/deny printing, copying, editing), and CipherForces returns an AES-256 encrypted copy. Recipients will need the password to open it. All encryption happens locally — we never see your password or document.

Common Use Cases

Legal documents: Encrypt NDAs, contracts, and closing documents before emailing.
Medical records: Protect health information (HIPAA-sensible — files still need encrypted transport).
Financial statements: Encrypt bank statements before sending to an accountant.
Tax returns: Protect sensitive IRS filings during file transfer.

Key Features

AES-256 encryption: The PDF 2.0 standard security handler (AESV3, 256-bit key), opened by every modern PDF reader.
Permission controls: Restrict printing, copying text, or modifying even after password entry.
Owner + user passwords: Set different passwords for full access vs view-only.
No password-strength compromise: Supports up to 127-character passphrases.

Privacy: Encryption runs in your browser on your device — the AES-256 keys are derived through your browser's own WebCrypto engine. Your password and file never touch our servers. Your text also stays text: the page is encrypted in place, never flattened to images, so the document remains selectable and searchable once unlocked.

FAQ

Frequently asked questions.

How do I password protect a PDF for free?

Open the Password Protect PDF tool, drag in your PDF, type the password you want to require, and download the locked file. It works right in your browser, so there is no signup and no software to install. The protected PDF will prompt for that password whenever someone opens it.

Is my PDF uploaded to a server when I add a password?

No. This tool runs entirely in your browser using JavaScript, so your PDF never leaves your device or touches a server. The password is applied locally on your own computer. That makes it safe for sensitive files like contracts, tax forms, or medical records that you do not want exposed online.

Can I open a password protected PDF on my phone or other apps?

Yes. The tool produces a standard encrypted PDF, so any reader that supports PDF passwords, including phones, tablets, and desktop apps, will ask for the password before opening it. Just share the password through a separate channel so the file stays protected in transit.

Does adding a password change the content of my PDF?

No. Adding a password only encrypts the file and sets the prompt that controls access. Your text, images, pages, and layout stay exactly as they were. Once someone enters the correct password, the PDF opens with all of its original content unchanged and fully readable.

Three steps