thirtytwo

Base32 encoding and decoding for Gleam, supporting all major variants. Works on both Erlang and JavaScript targets.

Supported Variants

Variant	Encode	Decode	Notes
RFC 4648	`encode`	`decode`	Standard alphabet, optional padding, case-insensitive decode
base32hex	`hex_encode`	`hex_decode`	Preserves sort order, optional padding, case-insensitive decode
Crockford	`crockford_encode`	`crockford_decode`	Optional check digit, alias normalization (O→0, I/L→1), hyphens ignored
z-base-32	`z_base_32_encode`	`z_base_32_decode`	Human-oriented, no padding, case-sensitive
Geohash	`geohash_encode`	`geohash_decode`	No padding, case-sensitive

Usage

gleam add thirtytwo

import thirtytwo

// RFC 4648
thirtytwo.encode(<<"wibble":utf8>>, padding: True)
// -> "O5UWEYTMMU======"

thirtytwo.decode("O5UWEYTMMU======")
// -> Ok(<<"wibble":utf8>>)

// Crockford with check digit
thirtytwo.crockford_encode(<<255>>, check: True)
// -> "ZW~"

thirtytwo.crockford_decode("ZW~", check: True)
// -> Ok(<<255>>)

// Geohash
thirtytwo.geohash_encode(<<"wibble":utf8>>)
// -> "fxnq4smddn"

Further documentation can be found at https://hexdocs.pm/thirtytwo.