Common questions

What is Base64 decoder?


What is Base64 decoder?

Base64 is a way of representing binary data in an ASCII string. ‘Base64 decoding’ is the process of transforming a base64 representation — a string of odd-looking text — back into the original binary or text data. Alternatively, type or paste in the text you want to base64–decode, then press the ‘Decode’ button.

How do I decode a Base64 string?

To decode with base64 you need to use the –decode flag. With encoded string, you can pipe an echo command into base64 as you did to encode it. Using the example encoding shown above, let’s decode it back into its original form. Provided your encoding was not corrupted the output should be your original string.

How does Base64 cipher work?

Base64 encoding takes the original binary data and operates on it by dividing it into tokens of three bytes. A byte consists of eight bits, so Base64 takes 24bits in total. These 3 bytes are then converted into four printable characters from the ASCII standard.

Which encoding ends with ==?

A Base64 string will end with == if and only if the number of bytes it encodes, mod 3, equals 1. Do you see the pattern? It happens that 16-byte (128-bit) encryption keys are very commonly encoded in Base64, and since 16 mod 3 = 1, their encoding will end with == .

Why is Base64 used?

Base64 encoding schemes are commonly used when there is a need to encode binary data that needs to be stored and transferred over media that are designed to deal with ASCII. This is to ensure that the data remain intact without modification during transport.

How can you tell Base64?

Encoded data will always have the following characteristic:

  1. The length of a Base64-encoded string is always a multiple of 4.
  2. Only these characters are used by the encryption: “A” to “Z”, “a” to “z”, “0” to “9”, “+” and “/”

Does base64 always end in ==?

A more complete answer is that a base64 encoded string doesn’t always end with a = , it will only end with one or two = if they are required to pad the string out to the proper length.

Does Base64 always end in ==?

Does all base64 end with ==?

It serves as padding. A more complete answer is that a base64 encoded string doesn’t always end with a = , it will only end with one or two = if they are required to pad the string out to the proper length. Thus, this is some sort of padding.

What is Base64 encoding and how it works?

Base64 encoding is a process of converting binary data to an ASCII string format by converting that binary data into a 6-bit character representation. The Base64 method of encoding is used when binary data, such as images or video, is transmitted over systems that are designed to transmit data in a plain-text (ASCII) format.

What is the real purpose of base64 encoding?

Base64 is an encoding and decoding technique used to convert binary data to an American Standard for Information Interchange (ASCII) text format, and vice versa. It is used to transfer data over a medium that only supports ASCII formats, such as email messages on Multipurpose Internet Mail Extension (MIME) and Extensible Markup Language (XML) data.

Why is base64 encode?

Base64 encoding is commonly used when there is a need to transmit binary data over media that do not correctly handle binary data and is designed to deal with textual data belonging to the 7-bit US-ASCII charset only.

How to do Base64 encoding?

To encode or decode Base64 data you need to first highlight the entire range of data you want to be encoded or decoded. Next, click on “Plugins” in the top bar, then “MIME Tools”. In the second level of the menu you can see all of the Base64 encode and decode options.