Encrypt your confidential contracts, financial statements, and personal records with unbreakable AES-256 passwords. Set printing and copying permissions with 100% privacy and zero server uploads.
Password-protect and seal your PDF with industry-standard AES-256 bit encryption. 100% in-browser security with zero file uploads.
In an era where remote work and digital communication dominate, sensitive PDF files are frequently transmitted across email, chat applications, and cloud links. Unencrypted PDF documents can be opened, copied, or modified by anyone who intercepts them. PDF encryption seals the internal binary stream of your file, ensuring that only individuals who possess the exact cryptographic key (your password) can view or print the content.
Bank statements, W-2 tax forms, audit reports, and investment statements contain sensitive social security numbers and account balances. Password protection prevents identity theft and unauthorized financial surveillance.
M&A contracts, non-disclosure agreements, dispute settlements, and employment contracts contain confidential clauses. Encrypting with user and owner passwords restricts unauthorized parties from copying or editing the agreement.
Patient medical charts, lab test results, and psychological evaluations are legally protected under HIPAA and GDPR health privacy rules. AES-256 PDF encryption provides the mandated cryptographic safeguard when sharing records.
Intellectual property, product blueprints, unreleased research, and enterprise client proposals require strict containment. Password locking ensures your strategic assets cannot be printed or leaked by competitors.
Safeguard any PDF document in seconds with zero software installations or cloud uploads.
Drag and drop your PDF into the secure box or select it from your device. Your file is loaded instantly in memory without uploading to any server.
Type your secret password and confirm it. The live strength meter evaluates your security. Optionally check restrictions for printing and text copying.
Click Encrypt PDF to generate your AES-256 encrypted file. Use the built-in password verification box to test unlocking it before downloading.
Unlike traditional online PDF converters that require sending your confidential contracts to cloud servers, PuroPDF processes everything 100% inside your local web browser.
Your files and passwords never touch our servers. Zero server uploads guarantee absolute compliance with strict NDA, HIPAA, and GDPR standards.
Compatible with Adobe Acrobat Pro, Apple Preview, Google Chrome, and mobile PDF viewers across Windows, Mac, iOS, and Android.
Test that your password unlocks the document properly right on the download screen before emailing or distributing it.
No signups, no credit cards, no subscriptions, and zero watermarks. Protect as many files as you need.
PuroPDF utilizes industry-standard AES-256 bit encryption (Revision 6), the highest standard recognized globally by government agencies and enterprise organizations. It is the same encryption algorithm utilized by Adobe Acrobat Pro, Apple Preview, and modern secure PDF readers.
Never. PuroPDF performs all document parsing, cryptography, and PDF stream encryption 100% locally within your web browser using WebAssembly and pure client-side Web Crypto. Your documents and passwords never leave your computer or smartphone.
An Open (User) Password is required for anyone to open and read the PDF. An Owner (Permissions) Password allows you to restrict specific capabilities like printing, modifying, or copying text/graphics, while allowing anyone with the master password to bypass those restrictions.
Yes! In the Advanced Document Permissions section, you can disable printing (or limit it to low-resolution) and prevent recipients from selecting, copying, or extracting text and images from your document.
Yes. Encrypted PDFs generated by PuroPDF strictly adhere to the official Adobe PDF specifications (ISO 32000-1 / 32000-2). When recipients open the file in Adobe Acrobat, Google Chrome, Microsoft Edge, macOS Preview, or mobile readers, they will be prompted for the password.
No. Because PuroPDF is 100% client-side and maintains zero server databases or telemetry, we have no access to your files or passwords. We strongly recommend noting down your password in a secure password manager.
No. PuroPDF is completely free, unlimited, and requires no account registration or payment. We never stamp watermarks or advertisements onto your protected documents.
Immediately after encryption, PuroPDF provides an instant built-in 'Test & Verify Your Password' tool directly on the download screen, allowing you to test unlocking the file right in your browser before sharing it.
