Protect PDF with Password Online — Encrypt PDF Free
Add password protection and encryption to your PDF files instantly. Choose between an opening password and restriction password to control who can view and edit your documents.
Perfect for protecting sensitive contracts, financial documents, medical records, or any file that needs to stay confidential.
Drop your file here, or browse
PDF file · Max 10 MB free
Free account required
Create a free account to use this tool — no credit card needed. You'll get 40 free credits every month!
Private & Secure
Files encrypted in transit and automatically deleted after your session ends.
Lightning Fast
Cloud-powered processing means most files are ready in under 10 seconds.
100% Free
Free for files up to 10MB. No hidden fees, no watermarks on output.
Security & Compliance
SSL/TLS Encrypted
Encrypted in transit
Auto-Deleted
Files removed after session
Processed Securely
Secure cloud infrastructure
No Tracking
No ads, no data selling
How to Protect PDF
Upload your PDF file
Click the upload area or drag and drop your file. Multiple file formats are supported.
Choose your settings
Our system processes your file securely. Most conversions complete within seconds.
Download your PDF file
Your processed file is ready instantly. Click download and your file will be saved to your device.
Why use Protect PDF?
- Password-protect confidential contracts before sharing
- Encrypt financial documents for secure distribution
- Restrict editing on finalized documents
- Protect medical or legal records with encryption
- Add security to documents shared via email
When should you use this?
- Sharing sensitive documents via email or cloud storage
- Distributing contracts that should not be modified
- Protecting personal or financial information in PDFs
- Adding security to documents for compliance requirements
- Preventing unauthorized access to confidential files
Is it secure?
Files Deleted After Session
Your files are automatically deleted when your session ends. We do not store, read, or share your documents.
Encrypted in Transit
All file transfers are protected with SSL/TLS encryption, ensuring your data is secure during upload and download.
Processed Securely
Files are processed on secure cloud infrastructure. No human ever accesses your documents during processing.
No Ads or Tracking
We don't serve ads, track your activity, or sell your data to third parties. Your privacy comes first.
Frequently Asked Questions
What types of protection can I add?
User password (to open) and owner password (to restrict editing and printing).
How strong is the encryption?
We use 256-bit AES encryption, the same standard used by banks and government agencies.
Can I change the password later?
Yes. Unlock the PDF and re-protect it with a new password.
Popular Use Cases
How to Encrypt Financial Documents Before Storing in the Cloud
You store tax returns, bank statements, investment records, and financial documents in Google Drive, Dropbox, or OneDrive for easy access. But if your cloud account is ever compromised — through phishing, a data breach, or a weak password — those sensitive financial files are immediately exposed to attackers.
Learn howHow to Password Protect a PDF Before Emailing
You're emailing sensitive financial documents, medical records, or contracts. Email isn't encrypted by default — anyone who intercepts the message or gains access to the recipient's inbox could read the attachments. For HIPAA, SOX, or GDPR compliance, unprotected email attachments are a liability.
Learn howRelated tools
Need larger files or batch processing?
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