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Base64 Encoder & Decoder

Encode text or binary data to Base64 and decode Base64 strings back to plain text. Runs entirely in your browser.

What is Base64?

Base64 encodes binary data as a sequence of printable ASCII characters using a 64-symbol alphabet (A–Z, a–z, 0–9, +, /). It is used everywhere binary must travel through text channels: email attachments, data URLs, JSON payloads, JWTs and HTTP Basic Auth headers.

100% private

All encoding and decoding uses your browser's built-in btoa and atob functions. Nothing is sent to a server.

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