Encrypt PDF with Password
Secure sensitive documents with password encryption before sharing or uploading. Set a password and only authorized recipients will be able to open your PDF.
Sending sensitive documents by email or uploading them to shared platforms? Encrypt your PDF with a password first. PDF.it adds industry-standard encryption so only people with the password can open your file — protecting contracts, financial records, medical documents, and more.
- ✓ Add strong password encryption to any PDF
- ✓ Industry-standard AES encryption
- ✓ Content, formatting, and quality preserved
- ✓ No installation — encrypt in your browser
Drop your PDF here
or click to browse files
Supported format: .pdf
Encrypt PDFs Before Sending by Email
Email is not secure by default. Encrypt sensitive contracts, tax documents, or personal records with a password before attaching. Share the password separately for maximum security.
Secure Financial Documents
Financial statements, audit reports, and internal memos contain sensitive information. Encrypt these PDFs before uploading to cloud storage or sharing with stakeholders.
Protect Legal Documents
Contracts, NDAs, and legal agreements require confidentiality. Password encryption ensures only intended parties can access the document, even if the file is intercepted.
How to Encrypt a PDF with a Password
Upload your PDF
Drag and drop or click to choose a file
Set a password
Enter a strong password to protect your document
Download encrypted PDF
Get your password-protected file instantly
Frequently Asked Questions
What encryption does PDF.it use to protect PDFs?
PDF.it uses industry-standard AES encryption to protect your PDF files. This is the same encryption standard used by banks and government agencies to secure sensitive data.
How do I open an encrypted PDF?
Anyone who receives the encrypted PDF will need to enter the password you set in order to open it. Standard PDF readers like Adobe Acrobat, Preview, and Chrome's built-in viewer all support password-protected PDFs.
Can I remove the encryption later?
Yes. Use PDF.it's Unlock PDF tool to remove the password protection. You will need to enter the current password to decrypt the file.
Will encrypting a PDF change its content or quality?
No. Encryption adds password protection without altering the content, layout, images, or quality of your PDF. The document remains identical — it just requires a password to open.
Can I encrypt a PDF on my phone?
Yes. PDF.it works in mobile browsers on iPhone and Android. Upload your PDF, set a password, and download the encrypted file — no app required.
Is it safe to encrypt PDFs with PDF.it?
Yes. Your files are processed securely and deleted from our servers after your session ends. We never store your passwords or share your documents.