#hex #base32 #base64 #no-std

no-std data-encoding

Efficient and customizable data-encoding functions like base64, base32, and hex

21 stable releases

2.9.0 Apr 12, 2025
2.8.0 Feb 9, 2025
2.7.0 Jan 14, 2025
2.6.0 Apr 28, 2024
1.1.1 Dec 12, 2015

#12 in Encoding

Download history 1499423/week @ 2025-02-01 1658194/week @ 2025-02-08 1646252/week @ 2025-02-15 1623626/week @ 2025-02-22 1916049/week @ 2025-03-01 1894268/week @ 2025-03-08 2100167/week @ 2025-03-15 2377532/week @ 2025-03-22 1744869/week @ 2025-03-29 1841843/week @ 2025-04-05 1653881/week @ 2025-04-12 1574204/week @ 2025-04-19 1509296/week @ 2025-04-26 1588522/week @ 2025-05-03 1628809/week @ 2025-05-10 1380510/week @ 2025-05-17

6,378,150 downloads per month
Used in 6,388 crates (513 directly)

MIT license

130KB
1.5K SLoC

CI Status Coverage Status

This library provides the following common encodings:

Name Description
HEXLOWER lowercase hexadecimal
HEXLOWER_PERMISSIVE lowercase hexadecimal (case-insensitive decoding)
HEXUPPER uppercase hexadecimal
HEXUPPER_PERMISSIVE uppercase hexadecimal (case-insensitive decoding)
BASE32 RFC4648 base32
BASE32_NOPAD RFC4648 base32 (no padding)
BASE32_NOPAD_NOCASE RFC4648 base32 (no padding, case-insensitive decoding)
BASE32_NOPAD_VISUAL RFC4648 base32 (no padding, visual-approx. decoding)
BASE32HEX RFC4648 base32hex
BASE32HEX_NOPAD RFC4648 base32hex (no padding)
BASE32_DNSSEC RFC5155 base32
BASE32_DNSCURVE DNSCurve base32
BASE64 RFC4648 base64
BASE64_NOPAD RFC4648 base64 (no padding)
BASE64_MIME RFC2045-like base64
BASE64_MIME_PERMISSIVE RFC2045-like base64 (ignoring trailing bits)
BASE64URL RFC4648 base64url
BASE64URL_NOPAD RFC4648 base64url (no padding)

It also provides the possibility to define custom little-endian ASCII base-conversion encodings for bases of size 2, 4, 8, 16, 32, and 64 (for which all above use-cases are particular instances).

See the documentation for more details.

No runtime deps

Features