📦 Base64 Encoder

Convert text to Base64 and decode Base64 strings with our powerful Base64 Encoder. Perfect for API development, email encoding, web development, and data transmission with support for standard and URL-safe encoding formats.

Choose whether to encode or decode Base64 data
Enter the text you want to encode or decode
Choose how to format the output
Use URL-safe Base64 encoding (replaces + and / with - and _)

How to Use This Base64 Encoder

How to Use the Base64 Encoder:

  1. Select operation: Encode text to Base64 or decode Base64 to text
  2. Enter your input text or Base64 string in the text area
  3. Choose output formatting options (plain, wrapped, or compact)
  4. Enable URL-safe encoding if needed for web applications
  5. Click Convert to see real-time results
  6. Copy result to clipboard or download as text file

Pro Tips: Use URL-safe encoding for web applications, line-wrapped format for email systems, and compact format for API responses!

How It Works

How This Tool Works:

This Base64 encoder uses JavaScript's built-in encoding functions to convert data safely in your browser. Here's the technical process:

  1. Input Processing: Converts text to UTF-8 bytes for proper character encoding
  2. Base64 Encoding: Transforms binary data into ASCII text using Base64 algorithm
  3. Format Options: Applies formatting like line wrapping or URL-safe character substitution
  4. Validation: Verifies Base64 format when decoding and provides error feedback

Base64 Encoding Types:

Standard Base64: Uses A-Z, a-z, 0-9, +, / characters with = padding

URL-Safe Base64: Replaces + with - and / with _ for safe use in URLs

MIME Base64: Line-wrapped at 76 characters for email compatibility

When You Might Need This

Frequently Asked Questions

What's the difference between standard and URL-safe Base64?

Standard Base64 uses + and / characters which can cause issues in URLs. URL-safe Base64 replaces these with - and _ characters, making it safe for use in web addresses and form data.

Why does my Base64 string end with = signs?

The = characters are padding to ensure the encoded string length is divisible by 4. This padding is required for proper Base64 decoding and is automatically handled by our tool.

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