Arcalio

Base64 Converter (Encode/Decode)

Encode and decode Base64 strings with full UTF-8 support (accents, special chars, emojis).

🔐 Online Base64 Converter: Encode & Decode Securely

Professional tool to transform text into Base64 format and vice versa. Essential for web developers needing to transmit binary data safely across text-designed media. Our converter fully supports UTF-8, ensuring accents, special characters, and emojis are processed without errors.

🚀 Common Base64 Uses

  • Data Transmission: Send binary data (images, files) via JSON or XML without corruption.
  • Email Headers: Encode email subjects and filenames containing non-ASCII characters.
  • Basic Auth: Generate the 'user:password' string needed for HTTP Authorization headers.
  • Data URIs: Embed small images directly into CSS or HTML to reduce HTTP requests.

✅ Advantages of this Converter

  • 🛡️ True UTF-8 Support: Unlike other tools, we correctly handle special characters and emojis.
  • 🛡️ Local Processing: Your data is encoded in your browser, perfect for credentials or sensitive info.
  • 🛡️ Error Detection: We alert you if you try to decode an invalid Base64 string.
  • 🛡️ Dual Mode: Switch instantly between Encode and Decode with intuitive tabs.

🛠️ How to use the tool

  1. Select mode: 'Encode' (Text -> Base64) or 'Decode' (Base64 -> Text).
  2. Type or paste your content in the top input area.
  3. The result will appear automatically in the bottom area.
  4. Use the copy button to grab the result.

🤓 What is Base64?

Base64 is a positional numeral system using 64 printable characters (A-Z, a-z, 0-9, +, /) to represent binary data. It is not an encryption method (anyone can decode it), but an encoding scheme for data transmission.