Lock PDF Online - Protect PDF with Password | Docready

Client-Side Encryption

Encrypt & Protect PDF

Secure your documents with a password instantly. No upload required.

Click to Select File

or drag and drop PDF here

Choose PDF File

file.pdf

0 MB

Set Password

File Encrypted!

Your password has been applied successfully.

Download PDF

Why Use Our Free PDF Locker?

In an age where data privacy is paramount, securing your sensitive documents is not just an option—it's a necessity. Whether you are a student submitting a thesis, an HR manager handling employee contracts, or a freelancer sending invoices, unauthorized access can lead to severe consequences. Our Professional PDF Password Protector offers a seamless, free, and ultra-secure way to add military-grade encryption to your files without ever exposing them to the internet.

100% Client-Side Privacy

Unlike other tools, your file is never uploaded to our servers. The encryption happens locally in your browser (using JavaScript), ensuring your data never leaves your device.

Lightning Fast Speed

Since there is no upload or download wait time, even large PDF files are encrypted in milliseconds. It works instantly on Windows, Mac, Linux, iOS, and Android.

AES-256 Encryption

We utilize the industry-standard AES encryption algorithm. Once locked, the file cannot be opened, printed, or copied without the exact password you set.

How to Password Protect a PDF (Step-by-Step)

1

Select Your Document

Click the "Choose PDF File" button or simply drag your file into the dashed area above.

2

Create a Strong Password

Enter a unique password. For maximum security, combine uppercase letters, numbers, and symbols.

3

Encrypt & Download

Click "Lock PDF Now". The tool will process the file instantly and generate a secure download link.

The Importance of PDF Security in 2024

With cyber threats evolving, standard password protection is often the first line of defense. Documents such as bank statements, tax returns, medical records, and legal agreements contain Personally Identifiable Information (PII) that hackers crave. By using a local encryption tool, you eliminate the risk of "Man-in-the-Middle" attacks that can occur during file uploads on unsecured networks.

Furthermore, many email providers scan attachments. By encrypting your PDF before attaching it to an email, you ensure that only the intended recipient (who holds the password) can view the contents. This is a critical practice for compliance with regulations like GDPR, HIPAA, and CCPA.

Frequently Asked Questions (FAQ)

Is it safe to use this tool for bank statements?

Absolutely. Because we use client-side technology, your sensitive bank statements are processed by your own computer's processor. We do not see, store, or copy your files. It is as safe as using offline software.

Can I remove the password later?

Yes, but you will need the original password to open it first. Once opened, you can use a "PDF Unlocker" tool or simply "Print to PDF" via Chrome to save a new, unlocked version.

Does this work on mobile phones?

Yes! Our tool is fully responsive and works perfectly on iPhone (iOS) and Android devices directly in the Chrome or Safari browser without installing any apps.

What if I forget my password?

Unfortunately, due to the high level of encryption (AES-128/256), the password cannot be recovered by us or anyone else. This is a security feature, not a bug. Please store your passwords safely.