base64ct

Pure Rust implementation of Base64 (RFC 4648) which avoids any usages of data-dependent branches/LUTs and thereby provides portable "best effort" constant-time operation and embedded-friendly no_std support

1.8.3 369M downloads/mo #306 most downloaded on crates.io RustCrypto/formats

What this package is like to depend on

Last release 7 months ago

12 Jan 2026

Ships unpredictably

gaps range from 8 days to 2.0 years

Nearly every release is documented

notes for 18 of 18 stable releases

12 versions withdrawn

withdrawn after publishing

6 years old

31 releases · first in 2021

3 releases in the last 12 months

see the full history below

Release timeline

31 releases · Jan 2021 to Jan 2026

2022 2023 2024 2025 2026

Release Pre-release Withdrawn

Releases

latest 31

1.8.3 12 Jan 2026
Release notes
Added
- Base64Pbkdf2 alphabet (#2168)
Open source →
1.8.2 03 Jan 2026
Release notes
Changed
- Deprecate Base64Crypt (#2135)
Open source →
1.8.1 07 Dec 2025
Release notes
Added
- Notes on crypt(3) alphabet variants (#2073)
Fixed
- Switch from doc_auto_cfg to doc_cfg (#2072)
Open source →
1.8.0 04 Jun 2025
Release notes
Changed
- Bump edition to 2024; MSRV 1.85 (#1839)
Open source →
1.7.3 13 Mar 2025
Release notes
Changed
- Don't fail with InvalidLength when reading nothing at end of data (#1716).
Open source →
1.7.2 13 Mar 2025
Release notes
Changed
- Revert [#1387]: reject zero-length decode requests as it's a breaking change (#1714)
Open source →
1.7.1 11 Mar 2025
Release notes
Changed
- MSRV 1.81 - edition downgraded to 2021 from yanked 1.7.0 release (#1702)
Open source →
1.7.0 26 Feb 2025 withdrawn
Release notes
Added
- derive additional traits on alphabets (#1578)
Changed
- ~~MSRV 1.85 // Edition 2024 (#1670)~~
- ~~reject zero-length decode requests (#1387)~~
- use core::error::Error (#1681)
Open source →
1.6.0 26 Feb 2023
Release notes
Changed
- MSRV 1.60 (#802)
- Lint improvements (#824)
Open source →
1.5.3 18 Oct 2022
Release notes
Added
- Base64ShaCrypt alphabet (#742)
Changed
- Use RangeInclusive for DecodeStep (#713)
Open source →
1.5.2 23 Aug 2022
Release notes
Fixed
- Return Ok(0) in io::Read impl to signal end of stream (#704)
Open source →
1.5.1 27 Jun 2022
Release notes
Fixed
- Last block validation (#680)
Open source →
1.5.0 30 Mar 2022
Release notes
Fixed
- Ensure checked arithmetic with clippy::integer_arithmetic lint (#557)
- Prevent foreign impls of Encoding by bounding sealed Variant trait (#562)
Open source →
1.4.1 11 Mar 2022
Release notes
Changed
- Rename Decoder::decoded_len => ::remaining_len (#500)
Open source →
1.4.0 11 Mar 2022 withdrawn
Release notes
Added
- Buffered Encoder type (#366, #455, #457)
- Decoder::decoded_len method (#403)
- Impl std::io::Read for Decoder (#404)
- Bounds for Encoding/Variant ZSTs (#405, #408)
Open source →
1.4.0-pre.0 04 Feb 2022 pre-release

Nothing published for this version
1.3.3 29 Dec 2021
Release notes
Fixed
- Potential infinite loop in Decoder::decode (#305)
Open source →
1.3.2 27 Dec 2021 withdrawn
Release notes
Fixed
- Decoder unpadding (#299)
- Edge case when using Decoder::new_wrapped (#300)
Open source →
1.3.1 20 Dec 2021 withdrawn
Release notes
Added
- Decoder::new_wrapped with support for line-wrapped Base64 (#292, #293, #294)
Open source →
1.3.0 03 Dec 2021 withdrawn
Release notes
Added
- Stateful Decoder type (#266)
Open source →
1.2.0 03 Nov 2021
Release notes
Changed
- Rust 2021 edition upgrade; MSRV 1.56 (#136)
Fixed
- Benchmarks (#135)
Open source →
1.1.1 14 Oct 2021
Release notes
Changed
- Update Util::Lookup paper references (#32)
Open source →
1.1.0 14 Sep 2021
Release notes
Changed
- Moved to formats repo; MSRV 1.51+ (#2)
Open source →
1.0.1 14 Aug 2021
Release notes
Fixed
- Make Encoding::decode reject invalid padding
Open source →
1.0.0 17 Mar 2021 withdrawn
Release notes
Changed
- Bump MSRV to 1.47+
Fixed
- MSRV-dependent TODOs in implementation
Open source →
0.2.1 08 Mar 2021 withdrawn
Release notes
Fixed
- MSRV docs
Open source →
0.2.0 01 Feb 2021 withdrawn
Release notes
Changed
- Refactor with Encoding trait
- Internal refactoring
Open source →
0.1.2 01 Feb 2021 withdrawn
Release notes
Added
- bcrypt encoding
- crypt(3) encoding
Changed
- Internal refactoring
Open source →
0.1.1 27 Jan 2021 withdrawn
Release notes
- Minor code improvements
Open source →
0.1.0 26 Jan 2021 withdrawn
Release notes
- Initial release
Open source →
0.0.0 21 Jan 2021 withdrawn

Nothing published for this version

base64ct

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Every package, every release, already written down.