JavaScript Requires Chilkat v11.7.0+

Remove the Password and Encryption from a PDF

See more PDF Protection Examples

Demonstrates the removeEncryption operation, which saves the PDF with no encryption at all: no password, no restrictions. It needs owner rights, so the PDF is loaded with its owner password. As with every Protection operation, the change is applied when the file is written. JavaScript

var success = false;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  The PDF used in this example is available at encrypted_user_password.pdf

var pdf = new CkPdf();

//  Removing the encryption needs owner rights: load with the owner password.
pdf.OwnerPassword = "owner-secret";
success = pdf.LoadFile("qa_data/pdf/encrypted_user_password.pdf");
if (success == false) {
    console.log(pdf.LastErrorText);
    return;
}

var json = new CkJsonObject();
var jsonOut = new CkJsonObject();
success = pdf.Protection("getInfo",json,jsonOut);
if (success == false) {
    console.log(pdf.LastErrorText);
    return;
}

console.log("encrypted, as loaded: " + jsonOut.BoolOf("loaded.encrypted"));
console.log("algorithm: " + jsonOut.StringOf("loaded.algorithm"));

success = pdf.Protection("removeEncryption",json,jsonOut);
if (success == false) {
    console.log(pdf.LastErrorText);
    return;
}

console.log("will be saved encrypted: " + jsonOut.BoolOf("pending.encrypted"));

success = pdf.WriteFile("qa_output/minutes_unprotected.pdf");
if (success == false) {
    console.log(pdf.LastErrorText);
    return;
}

//  The result is an ordinary PDF that opens without a password.
var reader = new CkPdf();
var info = new CkJsonObject();
success = reader.PreLoadCheck("qa_output/minutes_unprotected.pdf",info);
if (success == false) {
    console.log(reader.LastErrorText);
    return;
}

console.log("encrypted: " + info.BoolOf("encrypted"));
success = reader.LoadFile("qa_output/minutes_unprotected.pdf");
if (success == false) {
    console.log(reader.LastErrorText);
    return;
}

console.log("pages: " + reader.NumPages);

//  Sample output:

//  encrypted, as loaded: True
//  algorithm: rc4-128
//  will be saved encrypted: False
//  encrypted: False
//  pages: 1