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On this device

Organize12

Merge PDF Split PDF Extract pages Split PDF by size Delete pages Organize PDF Rotate PDF Crop PDF Pages per sheet Add page numbers Add watermark Stamp PDF

Optimize7

Compress PDF Repair PDF Optimize PDF for web Flatten PDF Edit PDF metadata Remove PDF metadata Edit PDF bookmarks

Convert15

PDF to JPG PDF to PNG PDF to WebP Extract images from PDF PDF to text PDF to Markdown OCR PDF JPG to PDF PNG to PDF WebP to PDF HEIC to PDF TIFF to PDF SVG to PDF Text to PDF Markdown to PDF

Edit and sign5

Edit PDF Fill PDF form Sign PDF Digitally sign PDF Compare PDF

Secure3

Protect PDF Unlock PDF Redact PDF

All tools
Protect PDF

Protect PDF

Encrypt a PDF with a password and decide what a reader may do with it.

Drop a PDF here

Pages appear straight away — nothing is sent anywhere.

Read on this device. No account, no upload. Drop as many files as you like — every one of them is processed.

Related tools

Unlock PDF
Redact PDF
Remove PDF metadata

Settings

Nothing starts until you press the button, and nothing is sent when it does.

Passwords

Password to open the file

Everyone who opens this file has to type it. A lost password cannot be recovered here or anywhere else, and this one never leaves your device.

Repeat the password to open the file

Type it twice. A password with a typo in it locks the file just as well, and cannot be recovered.

Password to change permissions

Optional, and different from the one above. It lets you change the permissions later without unlocking the file for everyone who reads it.

Set a password to open the file, a password to change permissions, or both. With neither, protecting the file changes nothing about it.

Encryption

AES-256Recommended256-bitThe current standard. Readers released in the last decade open it.AES-128128-bitChoose this only for a reader that refuses AES-256. It is still strong.

What readers may do

Permissions are a request, not a lock. Software that follows the standard honours them; software that ignores them can still print and copy. Only the password to open decides who reads the file.

Permissions

PrintingNot enforcedTurn this off to stop readers printing the file.High-resolution printingNot enforcedTurn this off to allow coarse printing only. It changes nothing while printing is off.Copying text and imagesNot enforcedTurn this off to stop readers taking content out of the file.Access for screen readersIgnoredBoth AES ciphers ignore this flag, so screen readers keep access either way.Changing the contentNot enforcedTurn this off to stop readers editing the text or the pages.Comments and highlightsNot enforcedTurn this off to stop readers marking up the file.Filling in form fieldsNot enforcedTurn this off to stop readers completing the form.Inserting, deleting and rotating pagesNot enforcedTurn this off to stop readers rearranging the document.

Passwords, permissions and what each one protects
How a drawn signature differs from a certificate

Add a file to start

Runs in this tab. Your file is not uploaded.

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