File to Base64

Please select a file to display Base64 result

Usage Instructions

1. Click 'Choose File' to select a file, it will be automatically converted to Base64.

2. Click 'Copy Result' to copy the Base64 to clipboard.

3. Click 'Download Result' to download as a txt file.

4. Click 'Clear' to reset the selection and result.

What is Base64

Base64 is a binary-to-text encoding scheme that represents binary data...

How to Use Base64

  • Embed images in HTML
  • Transfer binary data in JSON
  • Simple data obfuscation
  • URL-safe parameters (Base64URL variant)

How to Encode

Base64 Encoding Steps

1. Split the file into 3-byte chunks

2. Convert each chunk into 4 Base64 characters

3. Use '=' padding for incomplete chunks

4. Final encoding includes binary conversion and character mapping

How to Decode

Base64 Decoding Steps

1. Convert each Base64 character to 6-bit binary

2. Combine 4 characters into 3 bytes

3. Remove padding characters

4. Final decoding includes binary conversion and data reconstruction

Base64 in Python


import base64

data = "Hello World".encode('utf-8')
encoded = base64.b64encode(data).decode('utf-8')
print(encoded)  # SGVsbG8gV29ybGQ=

Base64 in JavaScript


const data = "Hello World";
const encoded = btoa(data);
console.log(encoded);  // SGVsbG8gV29ybGQ=

const buffer = Buffer.from(data).toString('base64');

Base64 in Java


import java.util.Base64;

String data = "Hello World";
String encoded = Base64.getEncoder()
                    .encodeToString(data.getBytes());
System.out.println(encoded);  // SGVsbG8gV29ybGQ=