Base64 Decoder

Online Base64 Decoder

What is Base 64 Decoding?

Base64 decoding is the process of taking an encoded string of data and converting it back into its original binary format. The encoded string is typically in the form of a Base64 encoded ASCII string, which is then decoded back into its original binary representation.

The most common use case for Base64 decoding is to take data that was encoded in Base64 and restore it back to its original binary format. This is often used in cases where binary data was encoded to ASCII format for transmission over a text-based network or for storage in a text-based format, and then needs to be decoded back to its original binary format for processing.

Base64 decoding is commonly used in security applications, such as digital certificates. In these cases, the encoded data is encrypted with a private key, and can only be decrypted with the corresponding public key. After the data is decrypted, it needs to be decoded back to its original binary format for further processing.

Another use case for Base64 decoding is in digital signature schemes. The encoded hash of a message is decoded before being decrypted with the public key to verify the authenticity of the message.

Base64 decoding is also used in generating random encryption keys. The keys are generated in binary format and then encoded in Base64 format before they are used in the encryption process. The decoded key is then used to decrypt the encrypted data.

In addition to the above, base64 decoding is used in reverse the process of embedding images in HTML, CSS, or JavaScript. Instead of linking to an image file on the web server, the image data is included as part of the HTML, CSS, or JavaScript file in the form of a Base64-encoded string, then it's decoded back to its original format.

It's worth noting that Base64 decoding is a reversible process, the decoded data can be easily encoded again to its base64 format. and while Base64 decoding can restore data to its original binary format, it does not provide any confidentiality for the data, and should not be used to protect sensitive information.

Generate MD5 In Programming Language?

• Java
• C#
• PHP
• Javascript

                    
String encoded = // some encoded string
byte[] decodedBytes = Base64.getDecoder().decode(encoded);
String decoded = new String(decodedBytes);
                    
                    

                    
string input = // base64 encoded string
string decoded = Encoding.UTF8.GetString(Convert.FromBase64String(input));
                    
                    

                    
$input = // base64 encoded string
echo base64_decode($input);
                    
                    

                    
var input = // base64 encoded string
var decoded = atob(input);