Encrypt a PDF File:
Add a User (Open) Password and/or an Owner (Restrictions) Password,
Set the Owner Pasport Restrictions:

STEP 1. Terms of Service. By selecting "I Agree" below, you acknowledge and agree that (a) this service is free, (b) we do not monitor the content of your uploaded files, (c) you are solely responsible for the content of your uploaded files, (d) you are solely responsible for use of this service, and (e) you release both author and publisher from any liability relating to use of this service with your files.

I Agree I Disagree

STEP 2 (optional). Subscribe to Our Free "Services Update Newsletter":

Enter your email address:

STEP 3. Upload PDF File:

STEP 4 (encryption).

Insert the open (user) password (or leave blank):

Insert the restrictions (owner) password (or leave blank):

Select the encryption strength:
40 Bit 128 Bit

Restriction 1. Is low resolution printing allowed?
Yes No

Restriction 2. Is all printing allowed? Note! Printing means both high resolution and low resolution printing.
Yes No

Restriction 3. Is content copying for accessibility allowed?
Yes No

Restriction 4. Is all content copying allowed? Note! Content copying means both general content copying and content copying for accessibility.
Yes No

Restriction 5. Is filling form fields allowed? Note! Filling form fields means entering form data, signing, and creation of template pages.
Yes No

Restriction 6. Is all commenting allowed? Note! Commenting means both modifying annotations and filling form fields.
Yes No

Restriction 7. Is document assembly allowed? Note! Document assembly means both inserting pages and deleting pages.
Yes No

Restriction 8. Is all changing the document allowed? Note! Changing the document means modifying content of document, document assembly, and filling form fields.
Yes No

STEP 5. Encrypt the Uploaded PDF File:

NOTE 1: There are two PDF password types - user (open) password and owner (restrictions) password. The user password (also called open password) protects a PDF file from opening. The owner (restrictions) password sets certain restrictions (to protect a PDF file from printing, inserting, deleting, and extracting pages, entering form data, signing, creating template pages, etc.). A PDF file may either be not encrypted at all or encrypted either only by a user (open) password, only by an owner (restrictions) password, or by both passwords.

NOTE 2: If there is either a user (open) password or an owner (restrictions) password, then the file is encrypted, then page extraction is not allowed (even if there are no other restrictions).

NOTE 3: Any encryption (including encryption by Adobe Acrobat full program) can (in certain cases) affect fonts, Javascript code, fields, and general file appearance. In such cases, a decryption (even by known password) may not restore the original (pre-encryption) fonts, Javascript, fields, and file appearance.

NOTE 4: Decryption by a known password usually affects neither fonts, nor Javascript code, nor fields, nor general file appearance. In contrast, removal of an unknown password can (in certain cases) affect Javascript code and fields, and thus can create a "mess". By this reason, in general, if the password is known, decryption should be done by utilizing the known password.

NOTE 5: The algorithm of this operation will detect and mark by a corresponding error message any input file that: NOTE 6: The algorithm of this operation will accept and successfully process any file (other than listed above), even if the file: NOTE 7: The algorithm of this operation will detect and mark by a corresponding error message a missed password.

NOTE 8: The algorithm of this operation will detect and mark by a corresponding error message any contradictory combination of restrictions.

NOTE 9: XFA vs PDF: PDF File Type vs PDF File Extension.

NOTE 10: Error Message: "To view the full contents of this document, you need ..."

NOTE 11: Error Message: "Please wait... If this message is not eventually replaced ..."

NOTE 12: How to Download Your Output Files.

NOTE 13: Your Privacy: Deleting Your Output Files.

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