Secure PDF Tools — Encrypt, Sign, and Protect Locally.
Securing a PDF should not require trusting a third party with its contents. Every security tool on PDF Safe runs entirely in your browser. Your file, your password, and your signature are processed on your device and never transmitted anywhere.
Encrypt PDFs with AES-256 before sharing
Add a password to any PDF using AES-256 encryption — the industry standard for document security. The encryption is applied locally on your device. Neither the file nor the password is ever sent to a server.
Sign documents without exposing them to a signing platform
Add a legally recognized electronic signature to any PDF locally. Your signature and the document remain on your device throughout the process.
Make documents tamper-evident by flattening
Flatten form fields and annotations to make them permanent and non-editable. A flattened document cannot have its fields modified without visible alteration to the content.
Remove hidden data before sharing
Strip author names, organization details, revision history, and other metadata from a PDF before distributing it. Prevents unintended information disclosure embedded in the file properties.
Remove password protection from your own files
Decrypt a password-protected PDF you own by entering the current password. The decryption happens in your browser and the unlocked file is downloaded directly to your device.
Reduce file size before secure transfer
Compress large PDFs to minimize transfer time when sharing over secure channels. The compression runs locally — the file never passes through a compression service.
Built different. On purpose.
Professional PDF tools with no server, no cloud, and no compromise on your privacy.
Privacy is the product
Your files are processed in your browser memory and deleted the moment you close the tab.
Your device. Your rules.
We use your hardware, not our servers. That means zero exposure to outside infrastructure.
Honest about money
PDF Safe is free. No ads. The developer pays for it. We may add ads later. Your data is never part of the business model.
Questions people actually ask
What encryption standard does PDF Safe use for password protection?
PDF Safe applies AES-256 encryption when adding password protection to a PDF. This is the same standard used by professional PDF software and is considered highly secure for document protection.
Can metadata really expose sensitive information?
Yes. PDF files store metadata including the author name, the organization, the software used to create the file, and sometimes revision history. This information can reveal details about the document origin or the people involved in its creation — information you may not want recipients to see.
Is flattening a PDF the same as locking it?
Flattening and locking serve different purposes. Flattening makes form fields and annotations permanent by merging them into the page content — they can no longer be edited or extracted as interactive elements. Password protection restricts who can open or modify the file. For maximum security, use both.
Are these tools appropriate for confidential documents?
Yes. All processing happens locally in your browser with no server transmission. Your confidential documents never leave your device, making these tools appropriate for sensitive personal, legal, and business documents.