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PDF up to 200MB

AES-256 Encryption

We use industry-standard encryption to ensure your PDF stays private and secure from unauthorized access.

No Server Uploads

Your files never leave your device. All encryption happens locally in your browser for 100% privacy.

Quality Preserved

Protecting your PDF doesn't change its content or quality. Your document remains exactly as it was, just secured.

Professional PDF Security Made Simple

Keep your confidential documents safe from prying eyes with our advanced encryption tool.

01

Why Password Protect Your PDFs?

In an era of digital data breaches, securing your information is more important than ever. Password protecting your PDFs ensures that even if a file is shared or intercepted, its contents remain unreadable to anyone without the correct credentials. It's the standard for professional document sharing.

02

Advanced Browser-Based Encryption

We believe privacy shouldn't be complicated. Our tool uses WebAssembly and PDF-lib to perform complex encryption routines directly in your browser. Unlike other online converters that store your files, we never even see your documents or your passwords.

03

Compatible with All PDF Viewers

The protection we apply follows standard PDF specifications. This means your password-protected PDF will work perfectly across all devices and software, including Adobe Acrobat, Chrome, macOS Preview, and mobile PDF readers.

FAQ

Frequently Asked Questions

How do I protect a PDF with a password?
Simply upload your PDF to our Protect tool, enter and confirm your chosen password, and click 'Protect & Download PDF'. Your file will be encrypted and downloaded instantly.
Is it safe to protect my sensitive documents here?
Yes! BosConvertPro uses client-side encryption. This means your PDF and your password never touch our servers. Everything happens within your browser's memory, making it the most secure way to handle private files.
Can I remove the password later?
Yes, you can use our PDF Unlock tool (if available) or any standard PDF software to remove the password if you have the original password.
What encryption standard do you use?
We use AES (Advanced Encryption Standard) which is the global industry standard for secure data encryption used by governments and financial institutions.
Is there a limit to how many PDFs I can protect?
No, our tool is 100% free with no daily limits or restrictions on the number of files you can secure.

The Ultimate Way to Secure Your PDF Documents

BosConvertPro's Protect PDF tool offers professional-grade security for your sensitive documents. Whether it's financial records, legal contracts, or personal IDs, our tool ensures that only those with the password can access the content. By utilizing modern web technologies, we've brought military-grade encryption directly to your browser, ensuring your data remains entirely under your control at all times.

Strong AES password protection
Instant encryption without server uploads
Works on all devices and browsers
Prevents unauthorized opening and copying
Completely free with no limits
Privacy-first: Files stay on your machine