Base64 Encoding Comparison Table

Input plaintext (UTF-8):

Base64 alphabet (index → char):

Index	Char	Index	Char	Index	Char	Index	Char

Encoded result:

Per-chunk mapping (3 bytes → 4 chars):

Chunk #	Input bytes (decimal)	Input bytes (hex)	24-bit binary	6-bit groups (4)	Index → Char	Output quartet	Padding

How to Use

What this page shows

Interactive Base64 reference: alphabet table, step‑by‑step chunk mapping, and a live encoder for your sample input.

Steps

Enter text above and click "Build Table".
Review the alphabet and the per‑chunk 24‑bit to 6‑bit mapping.
Copy the encoded result when satisfied.

Example

Input: Hello → Output: SGVsbG8=

Notes

Padding = is added when input bytes are not a multiple of 3.
URL‑safe Base64 replaces + / with - _; padding may be omitted.