Java base64 decode online

Base64 Decode Online

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.

We also have a tool to encode any binary data to Base64 encoded format. You can check it out at Base64 Encode Online.

Base64 Encoding and Decoding process

The Base64 encoding process receives input in the form of 8-bit bytes. It processes the input from left to right and organizes the input into 24-bit groups by concatenating three 8-bit bytes. These 24-bit groups are then treated as 4 concatenated 6-bit groups. Finally, each 6-bit group is converted to a single character in the Base64 alphabet by consulting the above Base64 alphabet table.

• Input has 8 bits remaining at the end: Four zero bits are added to form two 6-bit groups. Each 6-bit group is converted to the resulting Base64 encoded character using the Base64 index table. After that two pad (=) characters are appended to the output.
• Input has 16 bits remaining at the end: Two zero bits are added to form three 6-bit groups. Each of the three 6-bit groups is converted to the corresponding Base64 alphabet. Finally, a single pad (=) character is appended to the output.

The decoding process does the opposite of the above encoding process. Let’s look at an example to understand how Base64 encoding works:

01100001 01000000 01100010 01100011

Step 1: Organize the input into 24-bit groups (having four 6-bit groups each). Pad with zero bits at the end to form an integral no of 6-bit groups.

011000 010100 000001 100010 011000 110000 # (padded with four zeros at the end)

Step 2: Convert the 6-bit sequences to the Base64 alphabets by indexing into the Base64 index table. Add pad character if zero bits are added at the end of the input.

YUBiYw== # (padded with two `=` characters)

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Base64 Decode Online Tool

This online base64 decode tool helps you to convert a base64 format String into a raw string.

Paste your Input String or drag text file in the first textbox, then press «Base64 Decode» button, and the result will be displayed in the second textbox.

Is WordPress Rest API Authentication method (based on base64) really secure?

The WordPress REST API is enabled by default on all WordPress sites. APIs can be accessed by programs outside the site itself (such as mobile apps and RSS clients), the REST API endpoint is /wp-json/wp/v2/ .

WordPress REST API can be authenticated by adding header to the http request. The auth token is based on base64:

auth_token = base64.standard_b64encode(user + ‘:’ + password) headers =

But wait a minute, Base64 is not an encryption method, anyone can decode a Base64 string. Does that mean the admin password is transmitted on the open Internet without encryption? so anyone can hack into the WordPress REST API? It’s scary just thinking about it.

Luckily (maybe not), most website nowadays support https , which encrypt all the http request and response. And for those site does not support https , Base64 authentication method may never been used, it’s totally up to the website owner.

Generally speaking, It’s a bad practice to use Base64 as the authentication method, so stay away from it as far as possible.

Does Base64 Decode Online Tool log my data?

Absolutely NOT, this Base64 Decode doing all the formatting work on the client side, all logic are implemented by Javascript. There are 2 major advantages: 1.Your data never transmitted in the Open Internet, so you know it’s secure; 2.It’s much faster than doing all the work in the server side, because there is no Internet Delay.

More information about Base64:

Base64 Decode with Python (with package base64):

import base64 def base64_decoder(str): return base64.b64decode(str.encode())

Base64 Decode with Java (with package MessageDigest):

import java.util.Base64; public String decode(String str)

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Decode from Base64 format

Meet Base64 Decode and Encode, a simple online tool that does exactly what it says: decodes from Base64 encoding as well as encodes into it quickly and easily. Base64 encode your data without hassles or decode it into a human-readable format.

Base64 encoding schemes are commonly used when there is a need to encode binary data, especially when that data needs to be stored and transferred over media that are designed to deal with text. This encoding helps to ensure that the data remains intact without modification during transport. Base64 is used commonly in a number of applications including email via MIME, as well as storing complex data in XML or JSON.

• Character set: In case of textual data, the encoding scheme does not contain the character set, so you have to specify which character set was used during the encoding process. It is usually UTF-8, but can be many others; if you are not sure then play with the available options or try the auto-detect option. This information is used to convert the decoded data to our website’s character set so that all letters and symbols can be displayed properly. Note that this is irrelevant for files since no web-safe conversions need to be applied to them.
• Decode each line separately: The encoded data usually consists of continuous text, so even newline characters are converted into their Base64-encoded forms. Prior to decoding, all non-encoded whitespaces are stripped from the input to safeguard the input’s integrity. This option is useful if you intend to decode multiple independent data entries that are separated by line breaks.
• Live mode: When you turn on this option the entered data is decoded immediately with your browser’s built-in JavaScript functions, without sending any information to our servers. Currently, this mode supports only the UTF-8 character set.

All communications with our servers come through secure SSL encrypted connections (https). We delete uploaded files from our servers immediately after being processed and the resulting downloadable file is deleted right after the first download attempt or 15 minutes of inactivity (whichever is shorter). We do not keep or inspect the contents of the submitted data or uploaded files in any way. Read our privacy policy below for more details.

Our tool is free to use. From now on, you don’t need to download any software for such simple tasks.

Details of the Base64 encoding

Base64 is a generic term for a number of similar encoding schemes that encode binary data by treating it numerically and translating it into a base-64 representation. The Base64 term originates from a specific MIME-content transfer encoding.

The particular choice of characters to make up the 64 characters required for Base64 varies between implementations. The general rule is to choose a set of 64 characters that is both 1) part of a subset common to most encodings, and 2) also printable. This combination leaves the data unlikely to be modified in transit through systems such as email, which were traditionally not 8-bit clean. For example, MIME’s Base64 implementation uses A-Z, a-z, and 0-9 for the first 62 values, as well as «+» and «/» for the last two. Other variations, usually derived from Base64, share this property but differ in the symbols chosen for the last two values; an example is the URL and filename safe «RFC 4648 / Base64URL» variant, which uses «-» and «_».

Here’s a quote snippet from Thomas Hobbes’s Leviathan:

«Man is distinguished, not only by his reason, but . «

This is represented as an ASCII byte sequence and encoded in MIME’s Base64 scheme as follows:

In the above quote the encoded value of Man is TWFu. Encoded in ASCII, the letters «M», «a», and «n» are stored as the bytes 77, 97, 110, which are equivalent to «01001101», «01100001», and «01101110» in base-2. These three bytes are joined together in a 24 bit buffer producing the binary sequence «010011010110000101101110». Packs of 6 bits (6 bits have a maximum of 64 different binary values) are converted into 4 numbers (24 = 4 * 6 bits) which are then converted to their corresponding values in Base64.

Text content	M								a								n
ASCII	77								97								110
Bit pattern	0	1	0	0	1	1	0	1	0	1	1	0	0	0	0	1	0	1	1	0	1	1	1	0
Index	19						22						5						46
Base64-encoded	T						W						F						u

As this example illustrates, Base64 encoding converts 3 uncoded bytes (in this case, ASCII characters) into 4 encoded ASCII characters. Switch to mobile version

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Base64 Decode online

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

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

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

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

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.

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