Base64 Decode

Base64 Decode is a free online tool that allows you to convert the Base64 data into a text string, image, hex, or binary.


About Base64 Decode

Base64 Decode, also known as Base64 Converter, is a free-to-use and simple online tool that does exactly what its name suggests. It decodes the base64 data and gives results in plain text. Also, you can use it to convert base64 data into an image file, hex, or binary form. Moreover, it supports almost all the character encoding standards.

Base64 Decode | Base64 Converter Online

What is Base64?

In the world of computer programming, base64 is a set of binary-to-text encoding schemes used to represent binary data in 24-bit sequences that can further be represented in four 6-bit base64 digits. Base64 is used in various applications such as email via MIME and storing complex information in JSON or XML format.

Basically, base64 is a technique of encoding and decoding. It is used to convert binary data into ASCII (American Standard for Information Interchange) or text format, and vice-versa. This system uses 64 digits set that can be represented by 6 bits.

In addition, Base64 is very popular on the World Wide Web and where it embeds image files and other binary assets in textual assets like HTML or CSS files. Our Base64 Decoder can take any form of data and transform it into plain text.

Base64 contains the following:
Numeric Value:0-9
Uppercase and Lowercase Alphabets:A-Z and a-z
Special Characters:'+' and '/'

How does Base64 actually work?

The simplest and hassle-free way to decode base64 data is to use our base64 decode tool. However, if you wish to do it on your own then follow the process below.

Base64 decoding converts plain text into its original form. Technically, it converts 6-bit bytes into 8-bit bytes. Let's take an example to understand the base64 decoding process.

Example: Suppose a base64 string is "QUJD". Decode it into plain text.

Follow the step-by-step instructions below.

1. Firstly, split the string letter by letter. Thus, after splitting the string "QUJD", we get four groups:


2. Each group is a base64 character with its own index. Now, we need to convert the groups into indices. For that, map values from the base64 characters table and replace each character with its index. By doing so, you should get the following indices:

Q = 16
U = 20
J = 9
D = 3

3. Now, convert each group from decimal to binary. To do so, find corresponding decimal values in the ASCII table. You should get the following binary values:


4. Now, remove the prefix "00" from each group and we get:


5. Now join all the groups and we will get a 24-character string as below:


6. After that, divide the resulting string into 8 character groups. In case the last group has less than 8 characters, discard it. Now, you will have three groups of 8-bit bytes as follows:


7. Lastly, use the ASCII Code Table and convert all binary values into their ASCII characters. Finally, we get:


So, after decoding of "QUJD" we get text output "ABC".

How to use Base64 Decode?

Let's see how you can use this online tool to convert base64 data into a text string, image, hex, or binary.

  1. Firstly, open the Base64 Decode on your device that has an active Internet connection and browser support.
  2. Enter or paste the base64 data that you want to decode. Also, you can press the "Open File" button to choose and upload the local file from your device.
  3. Now select the output type. There are four options. Text string, image file, hex, and binary. Whatever you select, the output will be in that form.
  4. Most importantly, select the appropriate character encoding type. By default, it is set to ASCII/UTF-8 and it's most common.
  5. Lastly, press the "Decode" button to see the final results on your screen.
  6. To clear input as well as output, just press the "Reset" button.
  7. Also, you can use the "Copy" or "Save" buttons to copy or save the output.
  8. Use the "Swap" button, if you want to do the reverse process. It will open the Base64 Encode tool and you can encode the text string, image, hex, or binary to base64.

Features of Base64 Decoder

  • User-friendly interface: The simple user interface and fewer buttons make your task easy and fast. Also, we never compromise to provide the best user-friendly atmosphere to our valuable users.
  • Comprehensive: It's a one-stop destination and includes all the necessary features you need for decoding and encoding. So, you don't need to search for other tools.
  • Free to use: Base64 converter is absolutely free to use for all and forever.
  • Multi-browser support: It supports almost all the web browsers out there.
  • Compatibility: Our tool is capable of running on various different hardware, operating system, network environments, or mobile devices.
  • Secure: User's data security is very important to us. All communications with our server come through secured(HTTPS) connections. Also, we do not store the submitted data or files on our server. So, you don't need to worry about your data getting leaked or stolen. This makes our tool completely safe and secure to use.

Uses of Base64

The actual use of base64 was limited to a safe way to transmit data across machines. With time, it has been integrated into the implementation of several core Internet technologies such as encryption and file embedding.

  • Data transmission: Base64 transfer and store the data while simultaneously avoiding data corruption. Even more, it transmits JSON data and cookie information to users.
  • File embedding: Base64 embeds files in scripts and webpages in order to avoid dependence on external files. So, it helps to send Email attachments.
  • Data obfuscation: Data hashing schemes, for example, SHA and MD5, give results that cannot be read or transmitted. Thus, hashes are mostly base64 encoded so that they can easily display and use in file integrity checks.
  • Cryptography: Encrypted data contains sequences of bytes and those are not readable or transmittable. So, we often use base64 when encrypted data needs to be stored in a database or sent over the Internet. Moreover, public key certificates and certain other certification keys are also stored in base64 format.


No, there is no such limitation. You can decode data of any size using our base64 converter.

Simply enter the base64 data in our tool, select the output and character encoding type, and press the "Decode" button. As a result, you can see decoded output on your screen.

Yes, it's very much safe. Because it makes sensitive data difficult to decipher and provides a high level of security.

Firstly, upload your file using the "Open File" button and our system will automatically fetch the file's data inside the input box. Then press the "Decode" button to get the final result.

No, you can't use it offline. Because it's an online tool. So, you need an active internet connection and browser support to use it.

Just press the "Swap" button in the tool. Our base64 encoder will open and then you can input your decoded data and easily encode it.