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Base64 Encoder & Decoder - Online Base64 Tools

Quickly encode and decode text to Base64 format for safe data transmission. Perfect for encoding sensitive data in URLs, APIs, and configuration files.

Base64 Encoded

Decoded Text

What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that represents binary data as a string of ASCII characters. It's commonly used to encode data that needs to be transmitted over media designed to handle text, such as email systems, URLs, and configuration files.

Our Base64 encoder/decoder tool provides instant conversion between plain text and Base64 format, making it perfect for developers working with APIs, data storage, and secure communication protocols.

Key Features

  • Bidirectional conversion: Encode text to Base64 and decode Base64 back to text
  • Real-time processing: Instant conversion as you type
  • UTF-8 support: Handles unicode characters and special symbols
  • Copy functionality: One-click copying of results
  • Error handling: Clear feedback for invalid Base64 input
  • URL parameter support: Share encoded data via URL parameters

Common Use Cases

API Authentication

Encode credentials for Basic Authentication headers in HTTP requests.

Data URLs

Embed images and files directly in HTML/CSS using data: URLs with Base64 encoding.

Email Attachments

Encode binary files for safe transmission through email systems.

Configuration Storage

Store binary data or sensitive information in text-based configuration files.

How to Use the Base64 Encoder/Decoder

Encoding Text to Base64

  1. Enter your plain text in the "Decoded Text" field
  2. The tool automatically converts it to Base64 format
  3. Copy the Base64 result using the Copy button
  4. Use the encoded string in your applications or APIs

Decoding Base64 to Text

  1. Paste your Base64-encoded string in the top field
  2. The decoded text appears automatically below
  3. Any invalid Base64 will show an error message
  4. Copy the decoded result for use in your projects

Pro Tips

  • Base64 increases data size by approximately 33%
  • The tool handles all UTF-8 characters including emojis
  • Processing happens entirely in your browser for security
  • Invalid Base64 strings will show helpful error messages
  • Use URL parameters to share specific encoded values
  • Base64 strings can contain A-Z, a-z, 0-9, +, /, and = for padding

Why Use Our Base64 Tool?

Our Base64 encoder/decoder is designed for developers who need fast, reliable text encoding. The tool provides real-time conversion, error validation, and supports the full UTF-8 character set including international characters and symbols.

Unlike basic encoders, our tool offers bidirectional conversion, URL parameter support for sharing, and comprehensive error handling. All processing happens locally in your browser, ensuring your data remains private and secure.