#hex #base64 #base32 #no-std

no-std data-encoding

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

20 stable releases

2.8.0 Feb 9, 2025
2.6.0 Apr 28, 2024
2.5.0 Nov 21, 2023
2.4.0 May 20, 2023
1.1.1 Dec 12, 2015

#28 in Encoding

Download history 1176560/week @ 2024-12-03 1435851/week @ 2024-12-10 1037964/week @ 2024-12-17 473359/week @ 2024-12-24 712338/week @ 2024-12-31 1270834/week @ 2025-01-07 1345093/week @ 2025-01-14 1335096/week @ 2025-01-21 1385789/week @ 2025-01-28 1546678/week @ 2025-02-04 1572682/week @ 2025-02-11 1759705/week @ 2025-02-18 1583282/week @ 2025-02-25 1987322/week @ 2025-03-04 1927524/week @ 2025-03-11 1857406/week @ 2025-03-18

7,636,192 downloads per month
Used in 6,033 crates (501 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