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Base64 Encoder/Decoder

Encode and decode text in Base64

How to use the Base64 converter?

Quick conversion in 3 steps:

  1. Select the mode (Encode or Decode)
  2. Enter your text or Base64 in the input area
  3. Get the instantly converted result
Key features

Bidirectional conversion

Encode text to Base64 or decode Base64 to text with a single click.

UTF-8 support

Compatible with all Unicode characters, emojis, and international languages.

100% Secure

Local processing in your browser, no data sent over the internet.

Auto detection

Detects format errors and suggests smart corrections.

What is Base64?

Base64 is an encoding system that converts binary data into ASCII characters. It uses 64 characters: A-Z, a-z, 0-9, + and /.

  • Safe for transport: Avoids special character issues
  • Universal standard: RFC 4648, supported by all systems
  • Increases size: ~33% larger than original data
Practical applications
Web Development
  • Embed images in CSS/HTML via data URLs
  • Encode JWT authentication tokens
  • Send attachments by email
  • Store binary data in JSON
Security & API
  • Encode credentials for Basic Auth
  • Transmit SSL/TLS certificates
  • Exchange encryption keys
  • Serialize objects for APIs
Practical example
Original text
Hello, World! 👋
Encoded in Base64
SGVsbG8sIFdvcmxkISDP3Zwt
Did you know?

Base64 is not an encryption system! It's just an encoding. Never use Base64 alone to secure sensitive data. For security, always combine it with a real encryption system like AES or RSA.