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What is Base64 Encoding? How does Base64 encoding and decoding work?

Base64 encoding is a binary-to-text encoding/decoding scheme. The encoding process converts binary data to a printable ASCII string format. The decoding process converts the encoded string back to binary data.

Base64 Decoding in Python

Rajeev Singh1 mins

Learn how to Base64 decode an encoded string back to a normal utf-8 string. Python's base64 package contains various methods to perform Base64 decoding.

Base64 Decoding in Java

Rajeev Singh4 mins

In this article, you'll learn how to Base64 decode any Base64 encoded data back to binary data. Java 8's Base64 API provides implementations for Base64 encoding and decoding as described in RFC 4648.

Base64 Decoding in Node.js

Rajeev Singh4 mins

In this article, you'll learn how to Base64 decode any Base64 encoded data back to binary data using Node.js built-in Buffer API.

Base64 Decoding in Golang

Rajeev Singh1 mins

Learn how to decode a Base64 encoded string in Golang. Go's "encoding/base64" package contains functionalities to perform Base64 decoding on a string.

About Base64Decoder

Base64Decoder.io is a simple and easy-to-use online tool to decode any Base64 encoded data back to binary data.

You can get started by typing or pasting any Base64 encoded data in the input textarea, the tool will automatically decode your input in real time.

If the input is not a valid Base64 encoded string, then the input text area will turn red and the output textarea will be cleared.

Once the input is decoded, you can click in the output textarea to copy the decoded data.

The website also contains several tutorials and articles about how to decode any Base64 encoded data in different programming languages like Java, Go, PHP, Python, and Javascript.

Base64 encoding and decoding

Base64 encoding is an algorithm to convert binary data into ASCII character set. The encoding is required to transmit binary data safely through communication media/protocols that are designed to handle only textual data.

For example, email servers were traditionally designed to handle textual data from the ASCII character set. Therefore, if you want to send images or any other file via email, you first need to encode the image or file to Base64 encoded format and then send the encoded data to the email server.

The encoded data can be converted back to the original image or file at the receiver’s end using Base64 decoding. Base64 decoding is the inverse process of encoding. It converts the Base64 encoded data back to binary data.

Note that, Base64 should not be confused with encryption or compression techniques. It is just an encoding algorithm. You should not use Base64 encoding as a means to hide sensitive data.

To learn how Base64 encoding and decoding work, check out this article.

We also have a tool to encode any binary data to Base64 encoded format. You can check it out at https://www.base64encoder.io/.

To learn more about Base64 encoding/decoding, how it works, why it is required, and how to Base64 encode/decode in different programming languages, check out the blog section.