Base64 Encoder & Decoder — Free Online Tool (2026)
Encode text to Base64 or decode Base64 strings back to text instantly in your browser. Essential for API auth headers, data URIs, and URL-safe data encoding.
Base64 encoding converts binary data or text into ASCII characters — safe for transmission in URLs, JSON, XML, and HTTP headers. It's used everywhere: Basic Auth headers encode username:password as base64. Data URIs embed images directly in HTML/CSS. And JWT tokens use base64 for header and payload encoding.
The Base64 Encoder/Decoder does both directions: type or paste text and click Encode, or paste a base64 string and click Decode. Everything runs in your browser — your data never leaves your device.
Key Detail: Base64 is NOT Encryption
It's encoding — anyone can decode it. Never use base64 alone for security. For password hashing, use bcrypt, scrypt, or Argon2. Base64 is for data transport, not protection.