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Recover PDF User (Open) Password:




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.

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

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STEP 3. Upload a PDF File:




STEP 4. Recover a User (Open) Password of the Uploaded PDF File:

Warning! Please be ready to wait from a few seconds to many hours (depending on the password strength).


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 the file is locked by both a user (open) password and an owner (restrictions) password, then recovering of the owner (restrictions) Password needs (and is accompanied by) recovering of the user (open) password. In contrast, recovering of a user (open) password does not need (and is not accompanied by) recovering of an owner (restrictions) Password. If an owner (restrictions) Password is significantly stronger than a user (open) password, recovering of only a user (open) password can be significantly faster than recovering of both passwords. Accordingly, if all you need is to recover a user (open) password (to open a PDF file), it is reasonable to recover a user (open) password only; however, if you need to recover both a user (open) password (to open the file) and an owner (restrictions) Password (to remove restrictions), use another algorithm.

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, decryption by 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 using the known password rather than by removing a unknown password; if the password is unknown, it is reasonable to recover it (rather than to use the decryption by removal of an unknown password).

NOTE 5: The algorithm of this operation will detect and mark by a corresponding error message any input file that: NOTE 6: A password of a PDF file with a dynamic XFA structure cannot be recovered, and file is to be submitted for conversion to eliminate a dynamic XFA structure.

NOTE 7: The algorithm of this operation will accept and successfully process any file (other than listed above), even if the file: NOTE 8: XFA vs PDF: PDF File Type vs PDF File Extension.

NOTE 9: Error Message: "To view the full contents of this document, you need ..."

NOTE 10: Error Message: "Please wait... If this message is not eventually replaced ..."

NOTE 11: How to Download Your Output Files.

NOTE 12: Your Privacy: Deleting Your Output Files.




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