Skip to contentBase64 encodes binary data as ASCII text — common in data URLs, JWT payloads and email attachments.
Base64 maps every 3 bytes to 4 printable characters using A–Z, a–z, 0–9, + and /. Padding with = keeps length aligned. It is not encryption — anyone can decode Base64 with zero secret key.
Developers use Base64 for embedding small images in CSS, carrying binary in JSON and inspecting JWT segments. Tentaco Base64 Encoder/Decoder runs locally — paste or upload without sending secrets to a server.
