Base64 Encoder / Decoder

Base64 Encoder/Decoder is a simple, instant tool to encode text or decode Base64 strings. Widely used in web development, APIs, and data transmission, Base64 encoding converts binary data into ASCII characters for safe transport. Use this tool to encode API keys for HTTP Basic Auth headers, decode JWT payload sections, encode email attachments, or inspect Base64-encoded data from API responses. All processing is done client-side — your data is never sent to any server.