Base64 Encoder
Base64 Encoder
Instantly encode text, strings, and data into Base64 format online. 100% client-side processing keeps your data private.
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What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that translates data into an ASCII string format using 64 printable characters (A–Z, a–z, 0–9, +, and /). It is widely used across software development to safely transmit data across protocols designed for plain text.

Common Use Cases for Developers

  • HTTP Basic Authentication: Format username:password strings for basic auth authorization headers.
  • Data URIs: Embed small assets, SVGs, or images directly inside HTML or CSS files.
  • API Payloads: Safely pass binary or special characters inside webhooks and JSON objects without escaping issues.

100% Client-Side Privacy

Your data never leaves your device. All Base64 conversions are executed locally inside your web browser using native JavaScript, ensuring your passwords, API keys, and sensitive tokens remain completely private.