Protect PDF Online
Lock your PDF documents with AES encryption and custom permissions. 100% private in-browser tool.
How to Password Protect a PDF File for Free
- Upload your PDF: Drag and drop the PDF you wish to encrypt into the protected zone.
- Enter a strong password: Type the password required to view the document and confirm it.
- Configure permissions: Optionally restrict printing, text extraction, or content modifying.
- Encrypt and download: Click "Encrypt PDF Document" and download your locked file immediately.
Why Use FileVeda for PDF Encryption?
100% Offline in Your Browser
Unlike cloud tools, your password and private documents are never transmitted over the internet or logged on servers.
Military-Grade AES Security
Industry-standard AES encryption compatible with all major PDF viewers including Adobe Acrobat and mobile apps.
Granular Permissions
Select whether users can print or copy text from the document or enforce a total read-only lockdown.
Free & Unlimited
Lock sensitive financial records, contracts, or tax returns without paywalls or subscriptions.
FileVeda vs Traditional Cloud PDF Lockers
Why legal teams, accountants, and enterprises choose client-side encryption.
| Feature | FileVeda In-Browser | Cloud Competitors (Smallpdf / iLovePDF) |
|---|---|---|
| Data Privacy | 100% In-Browser (Zero uploads) | Uploaded to third-party cloud servers |
| Encryption Standard | AES-256 (ISO 32000-2 Standard) | Varies (often legacy 128-bit RC4) |
| File Size Limit | Unlimited (Device RAM dependent) | Capped (often 15MB–50MB for free tiers) |
| Server Password Logging | Impossible (Zero server processing) | Passwords transit over external networks |
| Pricing & Quotas | 100% Free Forever, No Limits | 2 tasks per day paywalls |
Understanding PDF Encryption Standards (ISO 32000-2)
PDF encryption uses two distinct passwords defined by Adobe and the International Organization for Standardization (ISO):
User / Open Password
Required whenever any recipient attempts to open or view the document. Without this key, cryptographic blocks cannot be decrypted by Adobe Acrobat, Apple Preview, or Chrome.
Owner / Permissions Password
Governs document restrictions. Even if a recipient can read the document, the Owner password enforces whether text can be copied, pages modified, or high-resolution printing permitted.
Frequently Asked Questions
How secure is FileVeda's PDF encryption?
FileVeda uses standard AES-256 PDF encryption (ISO 32000-2). Without the correct user password, modern PDF viewers like Adobe Acrobat, Google Chrome, and Apple Preview cannot decrypt or view the document.
Does FileVeda upload or store my password or PDF files?
Never. All encryption is executed locally inside your web browser's RAM via Web Crypto. Your documents and passwords never travel over the network to any remote server.
What is the difference between a User Password and an Owner Password?
A User Password is required to open and read the PDF. An Owner Password grants permissions to modify restrictions like printing, copying text, or editing form fields.
What happens if I forget my password?
Because FileVeda uses true client-side AES-256 cryptographic encryption without backdoors, forgotten passwords cannot be recovered. Always store your password safely.
Can encrypted PDFs be opened on mobile devices?
Yes, password-protected PDFs are universally compatible with Apple iOS Files, Android PDF Viewer, Adobe Reader, and all standard PDF software.
Is there a file size limit for encrypting PDFs?
No. Because encryption runs directly on your device CPU, you can protect multi-gigabyte PDF documents without hitting cloud upload limits.
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