如何将指定Base64字符串解码为二进制字符串？

Got it, let's walk through how to decode your provided Base64 string into binary data. I'll start with Python since it's one of the simplest ways to handle this without extra dependencies:

Python Implementation #

import base64

# Your input Base64 string
base64Str = 'AAAAAAAAAAAAAAAAAAAAAAAAAAEBAQEBAQEBAQEBAgICAwQEBwkMEBYcJTFAUGN8jqK3zNvo8/3/9+/f0ryijXlkTz0xJx0YEg8MCAYFBAMCAgIBAQEBAQEBAgICAgEBAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=='

# Decode to raw binary bytes
binary_bytes = base64.b64decode(base64Str)

# If you need a human-readable string of 0s and 1s
binary_string = ''.join(format(byte, '08b') for byte in binary_bytes)

# Print or use the result
print(binary_string)

What's going on here? #

• We use Python's built-in base64 module—no need to install any extra packages.
• b64decode converts the Base64 string directly to a bytes object, which is the raw binary representation of the data.
• If you specifically need a human-readable binary string (a sequence of 0s and 1s), we loop through each byte, convert it to an 8-bit binary string, and join all those pieces together.

Quick Tip for Other Languages #

If you're working in another language, the core logic stays the same: use the language's built-in Base64 decoding tool to get raw binary data. For example:

• JavaScript: Use atob() to decode the Base64 string to a plain string, then convert each character to its binary equivalent.
• Java: Use Base64.getDecoder().decode(base64Str) to get a byte[] containing the binary data.

内容的提问来源于stack exchange，提问作者ozilo