Base64 Encoder / Decoder
Encode and decode Base64 strings with full UTF-8 support
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About Base64
Base64 encodes binary data into ASCII characters using a 64-character alphabet (A–Z, a–z, 0–9, +, /). It's used everywhere: email attachments (MIME), data URIs in HTML/CSS, JWT tokens, and API payloads.
Common Uses
- • Embedding images in CSS:
data:image/png;base64,… - • JWT tokens (header.payload.signature)
- • HTTP Basic Auth headers
- • Email MIME attachments