PROTECT PDF

Add real password encryption to your PDF files. Set permissions for printing, copying, and editing. 128-bit RC4 standard encryption.

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DROP YOUR PDF HERE

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PDF

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OUTPUT FILENAME

.pdf

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128-BIT RC4 ENCRYPTION

Real PDF standard encryption

HOW TO PROTECT YOUR PDF

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UPLOAD PDF

Drop or select the PDF file you want to protect with real encryption.

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SET PASSWORD

Enter a strong password and configure permissions for printing, copying, editing, and form filling.

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DOWNLOAD

Get your 128-bit encrypted PDF. Anyone opening it will need the password you set.

WHY PASSWORD PROTECT YOUR PDF?

SECURE SHARING

SHARE WITH CONFIDENCE

Add a layer of protection before sharing sensitive documents like contracts, financial reports, or personal records via email or cloud storage.

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CONTROL ACCESS

Set granular permissions to control who can print, copy, or edit your document content.

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REAL ENCRYPTION

128-bit RC4 encryption per the PDF standard. Not just metadata - actual content encryption.

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FAST ENCRYPTION

Upload, encrypt, and download in seconds. No software to install, works right from your browser.

EVERYTHING YOU NEED TO KNOW ABOUT PDF PASSWORD PROTECTION

PDF password protection is essential for securing sensitive documents before sharing them electronically. Whether you are sending financial reports to clients, sharing legal contracts, or distributing confidential internal documents, adding a password ensures that only authorized recipients can access the content.

Our tool uses 128-bit RC4 encryption, the standard PDF encryption method supported by all major PDF readers including Adobe Acrobat, Chrome, Firefox, and Preview. The user password is required to open the document, while permission flags control what recipients can do with the content - printing, copying text, editing, and filling forms.

Best practices for PDF passwords include using a combination of uppercase letters, lowercase letters, numbers, and special characters. Aim for at least 8 characters, and avoid common words or personal information. Our built-in password strength meter helps you choose a strong password that resists brute-force attacks.

FREQUENTLY ASKED QUESTIONS

How does the PDF encryption work?expand_more

Your PDF is uploaded to our server, encrypted using 128-bit RC4 encryption per the PDF standard specification, and returned to you. The encryption key is derived from your password using the standard PDF key derivation algorithm. The resulting file requires the password to open in any PDF reader.

What type of encryption is used?expand_more

We use 128-bit RC4 encryption (PDF encryption standard, revision 3). This is the most widely supported encryption method, recognized by Adobe Acrobat, Chrome, Firefox, Edge, Preview, and virtually all PDF readers. All content streams and strings in the PDF are encrypted.

How strong should my PDF password be?expand_more

We recommend at least 8 characters with a mix of uppercase, lowercase, numbers, and special characters. Our built-in strength meter evaluates your password in real-time. Avoid dictionary words, birthdays, or sequential numbers.

Can I control what recipients can do with my PDF?expand_more

Yes! You can set permission flags for printing, copying, and editing. These flags are stored in the PDF metadata and respected by compatible PDF readers. Toggle each permission on or off before protecting your document.

Are my files safe?expand_more

Your PDF is uploaded securely for encryption processing and immediately discarded after the encrypted version is returned. We never store your files or passwords. The entire process takes just seconds.

Can I remove the password later?expand_more

Yes. Use our Unlock PDF tool to remove password protection from a PDF. You will need to know the original password to unlock documents that have been encrypted with reader-enforced protection.