BASE-985161 — Binary-to-Text via Big-Integer Conversion

BASE-985161 encodes any byte stream as text using a Unicode alphabet of 985,161 symbols (from U+10000 upward). It preserves leading zero bytes and performs true base conversion (256 <-> 985,161), similar to Base58 but at a much larger radix.

Why

• Unicode-friendly: copy/paste-safe in editors, browsers, and chats.
• Compact-ish: larger radix -> fewer characters than Base64 for many inputs.
• Reversible: lossless round-trip; leading zeros preserved.

Web (one-page)

Open index.html in your browser. Type text or upload a file -> ENCODE. Paste encoded text -> DECODE.

Python

python base985161.py enc input.bin out.b985161
python base985161.py dec out.b985161 restored.bin

import base985161  # if placed on PYTHONPATH
s = base985161.encode(b"Hello")
raw = base985161.decode(s)

Node / JavaScript

npm install base-985161
# or: npm install -g base-985161

node base985161.js enc input.bin out.b985161
node base985161.js dec out.b985161 restored.bin
# or via npm bin:
base985161 enc input.bin out.b985161
base985161 dec out.b985161 restored.bin

import { encode, decode } from 'base-985161';
const s = encode(new TextEncoder().encode('Hello'));
const raw = decode(s);

Design Notes

• Alphabet: contiguous Unicode range U+10000 .. U+10000+985160 (avoids surrogates).
• Method: big-integer division (repeated div/mod) for 256<->985161, preserving leading 0x00 bytes via leading zero-digits.
• No padding header is needed because conversion is exact in base arithmetic.

Caveats

• Some glyphs may render as tofu; that's fine—decoding uses code points, not glyph shapes.
• Not encryption: this is an encoding, not a security mechanism.

License

MIT