Base64 Encode / Decode

Encode text to Base64 or decode Base64 strings to plain text. Free, instant, all processing happens in your browser.

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What Is Base64?

Base64 is an encoding scheme that converts binary data into a text string using 64 printable ASCII characters (A–Z, a–z, 0–9, +, /). It's widely used to transmit binary data over text-based protocols like email, HTTP headers, and JSON.

Common uses include encoding images in CSS/HTML (data: URIs), storing binary data in JSON APIs, and encoding credentials in HTTP Basic Authentication.

All encoding and decoding happens in your browser — no data is sent to any server.