Base64 Encoder / Decoder (Encode and decode Base64 — for JWT payloads, API transport, email encoding, and cross-platform data)

Base64 converts binary data into ASCII text using 64 printable characters (A-Z, a-z, 0-9, +, /). It's used to safely transmit binary data through text-only channels like JSON, XML, email, and URL parameters.

Use Base64 when embedding images in JSON/HTML (data URIs), transmitting binary files through APIs, encoding JWT payloads, or sending email attachments. It increases data size by ~33% but ensures safe text transport.

No. Base64 is an encoding scheme, not encryption — anyone can decode it. It's designed for data transport compatibility, not security. Never use Base64 alone to protect sensitive data.