Is my PDF or password sent to a server during encryption?

No. Both your PDF file and the password you enter are processed entirely within your browser. The encryption operation is performed locally in memory, and the encrypted PDF is downloaded directly to your device. Neither the file content nor the password ever leaves your machine.

What happens if I forget the password after encrypting?

This tool cannot recover or remove a password that you do not know. AES-256 encryption is designed to be unbreakable without the correct password. Store your password in a trusted password manager immediately after encrypting the document to prevent permanent loss of access.

Will the encrypted PDF open on all PDF readers?

AES-256 encrypted PDFs are supported by all major PDF readers including Adobe Acrobat Reader, Foxit, macOS Preview, and most mobile PDF apps. Older PDF readers that predate PDF 1.6 may not support AES-256, but these are exceedingly rare in modern usage.

Does the tool set both open and permissions passwords?

The tool sets an open password that must be entered to view the document. It does not separately configure printing or editing restriction passwords, which are a different PDF security feature. For documents requiring both open and permissions restrictions, use a full-featured PDF editor like Adobe Acrobat.

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FreeNo Upload

PDF Encryptor

Protect your PDF with a password. Encrypt PDFs securely in your browser.

imageImg→PDF mergeMerge call_splitSplit compressCompress lockEncrypt lock_openDecrypt water_dropWatermark text_snippetTo Text table_viewTo CSV descriptionPDF→Word picture_as_pdfWord→PDF

infoAES-256 Browser Encryption

The encrypted .enc file can be decrypted using the PDF Decrypt tool. Use PDF Decrypt to restore the original PDF.

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Upload PDF files

Max file size: 50MB

Password

Confirm Password

How to Use

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Upload your PDF

Select the PDF you want to password-protect. Your document stays entirely on your device — no file data is sent over the network.

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Set your password

Enter a strong password and confirm it. Choose whether to also restrict printing, copying, or editing. Use a password you can remember — there is no recovery.

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Encrypt and download

Click Encrypt to apply password protection. The encrypted PDF downloads immediately. Share the password securely with intended recipients only.

What is PDF Encryptor?

PDF encrypt tool adds AES-256 password protection to any PDF document so only authorized recipients can open it. It runs entirely in the browser, applying industry-standard encryption without ever transmitting your file to a cloud service. Businesses, lawyers, and individuals use PDF encryption to protect confidential reports, personal data, and proprietary information.

Why use PDF Encryptor?

AES-256 is the same encryption standard used by governments and financial institutions, ensuring your password-protected PDF is resistant to brute-force attacks. Local processing guarantees that the unencrypted version of your file is never exposed to a third-party server. The straightforward interface requires no cryptography knowledge — just set a strong password and download the secured PDF.

lockComplete privacy — Your files never leave your device or browser.
boltInstant processing — No wait times, no server queues, no upload delays.
money_off100% free — No subscriptions, no credits, no hidden fees.
person_offNo registration — Start using immediately, no account needed.
devicesWorks everywhere — Any modern browser on desktop, tablet, or mobile.

How it works

An HR manager encrypts employee performance review PDFs before emailing them to department heads. A lawyer password-protects a settlement document before sharing it with opposing counsel. A freelance photographer locks a watermarked proof PDF so clients cannot distribute it without purchasing the full license.

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Pro Tip

Choose a password with at least 12 characters mixing letters, numbers, and symbols — AES-256 encryption is only as strong as the password you choose. Store the password in a password manager immediately after encrypting, because this tool cannot recover or crack an open password you forget.

Frequently Asked Questions

The tool applies AES-256 encryption, which is the same standard used by governments, financial institutions, and security software worldwide. AES-256 is considered computationally infeasible to break with current technology when combined with a strong password.

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