PDF Tools
Password Protect PDF Online
Add password protection to your PDF files in seconds. Free, no sign-up, no software to install, with AES-256 encryption and full control over printing, copying, and editing permissions.
Drop your PDFs here
or click to browse
Your file never leaves your device. Processed entirely in your browser.
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Why FileReadyNow
Protect PDF Files Online, Bank-Grade Encryption
AES-256, AES-128, and RC4-128 encryption with granular permission control. Free to use, no account, no software needed.
AES-256 Encryption
The same encryption standard used by banks and governments. Most free tools only offer basic RC4. This one defaults to AES-256.
Granular Permissions
Separately control printing, copying, editing, annotations, and form filling. Most tools only let you lock the whole file.
Password Never Stored
Your password protects the file and nothing else. It's never logged, saved, or linked to your document.
Batch Up to 10 Files
Upload up to 10 PDFs at once. Set a different password for each file, then download them one by one or grab all as a ZIP.
No Account Required
No signup, no watermark, no file size nag screens. Upload, set a password, download. That's it.
Deleted After Use
Your file is deleted from our server as soon as you download. Nothing is stored, shared, or held onto.
If you send a PDF without a password, like a contract, an invoice, a medical record, or a scanned ID, anyone who gets hold of it can open it, copy the text out, or print it. Adding a password locks the file behind an encryption layer so it won't open until the right passphrase is typed in. This tool does that in a few seconds, right in your browser, with no software to install and no account to create.
What protecting a PDF actually does
It wraps your document's content in a cryptographic layer using AES-256, AES-128, or RC4-128, whichever encryption level you pick. Your password becomes the key needed to open and view the file. Permissions like printing, copying, editing, annotations, and form filling get baked into that same layer, so any PDF reader that follows the spec will enforce exactly the restrictions you set.
Nothing in the document itself changes. Text, images, fonts, and formatting stay identical. They're just locked behind the password and permission rules you choose.
Encryption levels this tool supports
- AES-256: the strongest option available, matching PDF 1.7+ (Acrobat 9 and later). Use this for anything sensitive, financial, legal, or confidential.
- AES-128: matches PDF 1.5 to 1.6 (Acrobat 6 to 7). Still strong, and compatible with pretty much every modern PDF reader.
- RC4-128: matches PDF 1.4 (Acrobat 5). Only pick this one if you need to support older PDF software that can't handle AES.
When to use this tool
- Contracts and legal documents: password protect before emailing so only the intended recipient can open them.
- Invoices and financial statements: prevent unauthorised access when sharing statements with clients or external accountants.
- Reports and presentations: lock editing and copying while still allowing the recipient to read and print.
- Forms: allow form filling but block printing or copying the rest of the document content.
How to password protect a PDF on Windows
Windows doesn't come with a built-in way to password protect PDFs. Open this page in any browser, upload your PDF, set a password, and click Protect PDF. The protected file downloads straight to your device in seconds, no Adobe Acrobat or third-party software needed.
How to password protect a PDF on Mac
macOS Preview can add a password when you export a PDF (File → Export as PDF → check "Encrypt"), but it only offers basic 128-bit RC4. Use this tool instead if you need AES-256 encryption or want to control permissions like printing and copying separately.
How to password protect a PDF on iPhone or Android
This tool works fine in any mobile browser, Safari on iPhone or Chrome on Android. Open the page, tap the upload area, pick your PDF from Files or Google Drive, set a password, and download the protected version. No app to install.
What you get after protecting your PDF
The output is a standard password-protected PDF that downloads directly to your device. All content is preserved exactly as it was, now wrapped in encryption with the permissions you chose. If you protected multiple files, each downloads separately or you can grab them all in a single ZIP.
Step by Step
How to Protect a PDF Online for Free
Click the upload area or drag and drop your PDF into the tool.
Enter a password for the file. Optionally open Advanced protection options to set an owner password, encryption level, and permissions.
Click 'Protect PDF' and the password-protected PDF downloads straight to your device.
Frequently Asked Questions
Upload your PDF, enter a password, confirm it, and download the protected file.
Yes. Many online tools allow you to password protect PDF files without installing software.
No. Password protection only encrypts the document and does not affect its formatting, images, or text quality.
Yes, if you know the correct password, you can use a PDF unlock tool to remove the protection.
A strong password should include uppercase letters, lowercase letters, numbers, and special characters while avoiding common words.
Password protection is an effective first layer of security. Using a strong, unique password and sharing it securely provides better protection for sensitive files.