Security
Free Security PDF Tools
Secure your PDF files with free tools to add password protection, remove passwords, flatten form fields, and redact sensitive content. All security tools run in your browser for total privacy — your documents never leave your device.
Protect PDF
Password-protect and encrypt PDF files for free. Add security to any PDF document — processed entirely in your browser for total privacy.
Unlock PDF
Remove PDF password protection for free. Unlock encrypted PDF files so you can edit, print, and share them freely — browser-based and private.
Flatten PDF
Flatten PDF forms and annotations for free. Merge interactive fields into static page content — browser-based, instant, and private.
Redact PDF
Redact sensitive information from PDF documents for free. Permanently remove text, images, and data — browser-based and secure.
Secure your PDF documents for free
Keep sensitive documents safe with Protect PDF, which adds password encryption to prevent unauthorized access. Need to open a locked file? Unlock PDF removes password protection when you have the original password, letting you freely edit and share the document.
Before distributing a document, flatten the PDF to merge form fields and annotations into the page content so it looks identical everywhere. For confidential information, the Redact PDF tool permanently removes sensitive text and images before sharing.
All security tools process your files entirely in your browser — your documents never leave your device. Pair them with watermarking or electronic signatures for a complete document security workflow. Browse all tools for more options.
Security PDF Tools — FAQ
Common questions about security PDF tools.
Yes. Our Protect PDF tool adds encryption and password protection to any PDF, completely free and processed in your browser.
Yes, if you know the current password. Our Unlock PDF tool removes password protection so you can freely edit and share the document.
Flattening merges interactive form fields and annotations into the page content, creating a static document that looks the same everywhere and cannot be edited.
Yes. All security tools process files entirely in your browser. Your documents are never uploaded to any server.
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