Base64 Encoding & Decoding Guides

Learn everything about Base64: how 24-bit binary data is converted to 6-bit ASCII characters, RFC 4648 rules, padding calculations, and full ASCII reference tables.

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Base64 Articles

01

What is Base64?

Understand what Base64 encoding is, why it is needed, and where it is used across the web.

4 min read
02

Base64 Algorithm

Deep dive into the mathematics and bitwise mechanics behind the Base64 encoding standard.

5 min read
03

Encoding Algorithm

Step-by-step specification of Base64 encoding and padding with equals signs.

5 min read
04

Decoding Algorithm

Learn how decoders reconstruct original bytes, handle padding, and validate Base64 streams.

4 min read
05

Base64 Characters

Explore the 64-character alphabet, standard vs URL-safe variants, and index tables.

4 min read
06

ASCII Table

Complete printable ASCII character reference table with decimal, hex, and binary values.

6 min read