Question 1

What is Base64 encoding?

Accepted Answer

Base64 is an encoding scheme that converts binary data (or any bytes) to ASCII text using 64 characters (A-Z, a-z, 0-9, +, /). It's used to safely transmit binary data in text-based systems like email, JSON, and HTTP headers.

Question 2

When would I need to decode Base64?

Accepted Answer

Common use cases: decoding JWT tokens (which are Base64-encoded), reading API responses, decoding email attachments, and working with data URIs for images.

Question 3

What is URL-safe Base64?

Accepted Answer

URL-safe Base64 replaces + with - and / with _ to make the encoded string safe to use in URLs without percent-encoding. Used in JWT tokens and many web APIs.

Question 4

Can I encode images to Base64?

Accepted Answer

Yes — upload any image file and get its Base64 data URI, which you can embed directly in HTML or CSS without a separate image request.

Base64 Encoder / Decoder