(Node.js) Base64 Encode a File

Node.js to Base64 encode the contents of a file.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // Get the contents of a file into a base64 encoded string:
    var fac = new chilkat.FileAccess();
    var strBase64 = fac.ReadBinaryToEncoded("c:/data/something.pdf","base64");
    if (fac.LastMethodSuccess !== true) {
        console.log(fac.LastErrorText);
        return;
    }

    // Now write the string to a file:
    var success = fac.WriteEntireTextFile("c:/data/something_pdf_base64.txt",strBase64,"us-ascii",false);
    if (success !== true) {
        console.log(fac.LastErrorText);
        return;
    }

    console.log("Success!");

}

chilkatExample();