What is Base64 encoding used for?

Base64 encodes binary data as ASCII text using 64 characters (A–Z, a–z, 0–9, +, /). Common uses: embedding images in HTML/CSS (data URIs), encoding email attachments (MIME), API authentication (Basic Auth is username:password in Base64), storing binary data in JSON. It increases size by ~33% but makes binary safe for text transmission.

Is Base64 the same as encryption?

No. Base64 is encoding, not encryption — it provides no security. Anyone can decode it instantly. Never use Base64 to 'hide' passwords or sensitive data. For security, use proper encryption (AES-256) or hashing (bcrypt for passwords). Basic Auth headers in HTTP are Base64-encoded and readable by anyone who captures the traffic.

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