Online Base64 Encoder

I encoded a string using PHP function base64_encode(). Now decoding it using v using window.atob(). but it is not decoding "." (dot) properly.

String is 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;

JavaScript giving below output

Direction (82-84): A Sentence has been given with blanks to the filled with an appropriate word/s. Four alternatives are suggested for each question. Choose the correct alternative and give the right answer.

84. The criminal was.â¦â¦â¦â¦â¦â¦â¦â¦â¦. lest he should escape.

But when decoding using php the output is

Direction (82-84): A Sentence has been given with blanks to the filled with an appropriate word/s. Four alternatives are suggested for each question. Choose the correct alternative and give the right answer.

84. The criminal was.......... lest he should escape.

so I want to build an app that generates random passwords and stores them encrypted and use it to change my passwords.I came up with a simple custom encrypting solusion that adds a value to the ASCII value of the characters but I though I might try implementing a real encryption algorithm and I saw some people suggesting Base64.I know the basics about how it is done but I want help understanding the Java code that i found implementing it.

The repository

Whoever could help me really understand the logic and answer some of my following questions with SIMPLE words would be a hero for me XD

1. How does this thing run? Shouldn't it have a main function or something?
2. line 2: I understand that he declares all the characters used in Base64 but what are the last 2? "+ /"
3. line 30: So I understand that padding is a technique that adds bits to extend the existing bits when needed. Base64 takes 3 bytes(24 bits) and splits them to 4 groups of 6,so i guess that the total number of bits mod 24 should be 0 after padding right? If we take the word "Hello" we have 5*8=40 bits,according to the code: int paddingCount = (3 - (40 % 3)) % 3. paddingCount = 2.But what is this 2?I know padding is done with the "=" but how does this work exactly.
4. line 36-39: Explain these to me please.Why do we shift bits and do the &?
5. line 38: What the heck is "tbl" ?
6. Help me understand the decoder
7. what is the purpose of gendecodetbl.py file?And why is it written in python lol.

I need to encode base64 string from database to pdf. I've found some encoders online but it seems that i'm doing something wrong.

Collation column in shema is Slovenian_CI_AS and i think that seems to be a problem when i'm saving encoded string as PDF.

Is this even possible doing this way?

In settings where data transmission must be done using printable characters, Base64 (along with Base58 and other variants) seem to be the go-to answers in most settings. However, after looking a bit more closely at how Base64 works it seems that it is designed specifically for byte-aligned data. That is, where the number of total bits in the data is divisible by 8.

Is that correct? If so, are other encoding algorithms available for encoding data that may not be byte-aligned?

I have used bitwise operator in php code which return decode string in base64. I want implement that php code same as in javascript. As per my knowledge chr() equivalent to String.fromCharCode(n) and ord() is n.charCodeAt(0). But both final output are differed.

PHP code:-

<?php$pass = "RuvEtrUt74gaDR5DufuChe";$en = "";foreach(str_split($pass) as $chr){    $b1=((($chr = ord($chr)) >> 1) & 0xFF);    $b2=($chr << (8 - 1));     $en = $en.chr( $b1|$b2 );}$en = base64_encode($en); //Output:- )º;¢:9ª:›³°")š"º3º¡4²echo ($en);echo (base64_decode($en)); //Output:- Kbo7ojo5qjqbGrOwIimaIrozuqE0sg==

In Javascript Code:-

var pass = "RuvEtrUt74gaDR5DufuChe";var en = "";var passArr = pass.split('');for (var i = 0; i < passArr.length; i++) {    var b1 = (((passArr[i] = passArr[i].charCodeAt(0)) >> 1) & 0xFF);    var b2 = (passArr[i] << (8 - 1));    en += chr(b1 | b2);}console.log('en',en);//Output:- ⤩㪺㬻⊢㨺㤹⪪㨺ᮛᨚ㎳グ∢⤩᪚∢㪺㌳㪺↡㐴㊲en = window.btoa(unescape(encodeURIComponent(en)));console.log('en', en);//Output:- 4qSp46q646y74oqi46i646S54qqq46i64a6b4aia446z44Kw4oii4qSp4aqa4oii46q644yz46q64oah45C044qy                     //need same as in php i.e, :- Kbo7ojo5qjqbGrOwIimaIrozuqE0sg==function chr(codePt) {    if (codePt > 0xFFFF) {        codePt -= 0x10000        return String.fromCharCode(0xD800 + (codePt >> 10), 0xDC00 + (codePt & 0x3FF))    }    return String.fromCharCode(codePt)}

As you can see above javscript output is differed from php output. I need exact output in javascript which return in php code. Thanks