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SimpleBase

5.6.411M downloads/mossg/SimpleBase ↗New releases in your daily digest, changelog included.

Base16, Base32, Base45, Base58, Base62, Base85 encoding/decoding library

Last release 2 months ago
09 Aug 2026
Release timing varies
gaps range from 8 days to 1.8 years
Some releases are documented
notes for 16 of 32 stable releases
8 versions withdrawn
withdrawn after publishing
127 years old
40 releases · first in 1900

Release timeline

40 releases since 1900

1900190219041906

Releases

5.6.49 Aug 20262 sources agree
Fix another regression in Base58 encoding with certain buffer sizes that caused output to be truncated one byte. Thanks again, @unsafePtr!
5.6.4

Fixes

Fix another regression in Base58 encoding with certain buffer sizes that caused output to be truncated one byte. Thanks again, @unsafePtr!

Added more test coverage for Base58
Additional notes
5.6.4

Fixes

Fix another regression in Base58 encoding with certain buffer sizes that caused output to be truncated one byte. Thanks again, @unsafePtr!

Added more test coverage for Base58

Full Changelog: 5.6.3...5.6.4
Open source →
5.6.31 Jan 1900withdrawn
Fix a regression in Base58 encoding with unusual buffer sizes that caused output to be truncated one byte. Thanks @unsafePtr!

5.6.3

Fixes

Fix a regression in Base58 encoding with unusual buffer sizes that caused output to be truncated one byte. Thanks @unsafePtr!
Fix an incorrect shortcut encoding bug in Base85.Ascii85 (this fix was also backported to 2.1.1).

Additional notes2 sources agree

5.6.3

Fixes

Fix a regression in Base58 encoding with unusual buffer sizes that caused output to be truncated one byte. Thanks @unsafePtr!
Fix an incorrect encoding bug in Base85 (this fix was also backported to 2.1.1).

Full Changelog: 5.6.2...5.6.3

Open source →

5.6.217 Jul 2026

Fix an regression in Base32 decoder on systems with Turkish culture (thanks, @skacurt)

5.6.2

Fixes

Fix an regression in Base32 decoder on systems with Turkish culture (thanks, @skacurt)

Additional notes

What's Changed

Fix exception with Base32 on systems with Turkish culture by @skacurt in #82

New Contributors

@skacurt made their first contribution in #82

Full Changelog: 5.6.1...5.6.2

Open source →

Additional notes

What's Changed

Fix exception with Base32 on systems with Turkish culture by @skacurt in https://github.com/ssg/SimpleBase/pull/82

New Contributors

@skacurt made their first contribution in https://github.com/ssg/SimpleBase/pull/82

Open source →

5.6.117 Jun 2026

DividingCoder derivatives are now generally faster

5.6.1 Improvements

DividingCoder derivatives are now generally faster
MoneroBase58 is now faster
Update dependencies

Fixes

Fix a bug in buffer length calculation in DividingCoder derivatives that caused incorrect encoding/decoding (thanks to @marcasburnett)

Additional notes

5.6.1 Improvements

DividingCoder derivatives are now generally faster
MoneroBase58 is now faster
Update dependencies

Fixes

Correct truncation in calculations of byte and character counts. by @marcasburnett in #80

New Contributors

@marcasburnett made their first contribution in #80

Full Changelog: 5.6.0...5.6.1

Open source →

5.6.013 Nov 20252 sources agree

This release separately targets .NET 9 and .NET 10 along with .NET 8

5.6.0

Improvements

This release separately targets .NET 9 and .NET 10 along with .NET 8
Remove dependency to System.Memory package
Improve IPv6 Base85 encoding/decoding performance

Fixes

Base58.TryDecodeCheck() now consistently returns version 0 in its output for failure cases
Base32.DecodeUInt64() and Base32.TryDecodeUInt64() will now always decode correctly for smaller inputs
Multiple bugs in Base85 IPv6 decoding have been addressed

Additional notes

Improvements

This release separately targets .NET 9 and .NET 10 along with .NET 8
Remove dependency to System.Memory package
Improve IPv6 Base85 encoding/decoding performance

Fixes

Base58.TryDecodeCheck() now consistently returns version 0 in its output for failure cases
Base32.DecodeUInt64() and Base32.TryDecodeUInt64() will now always decode correctly for smaller inputs
Multiple bugs in Base85 IPv6 decoding have been addressed

Full Changelog: 5.5.0...5.6.0 .

Open source →

5.5.014 Sept 20252 sources agree

EncodeCheck and TryDecodeCheck variants with variable length version/prefix buffers

New features

EncodeCheck and TryDecodeCheck variants with variable length version/prefix buffers
EncodeCheckSkipZeroes that encodes for address formats like Tezos

Additional notes

New features

EncodeCheck and TryDecodeCheck variants with variable length version/prefix buffers
EncodeCheckSkipZeroes that encodes for address formats like Tezos

Fixes

fix: adjust finalBuffer slicing to use dynamic prefix length by @psavva in #75

New Contributors

@psavva made their first contribution in #75

Full Changelog: 5.4.1...5.5.0

Open source →

5.4.120 May 20252 sources agree

Remove unused function from CodingAlphabet

Fixes

Remove unused function from CodingAlphabet

Additional notes

(This is a minor fix for a previous release (5.4.0) that includes an unnecessary function and will be unlisted)

Fixes

Remove unused function from CodingAlphabet

Open source →

5.3.018 May 20252 sources agree

Base2, Base8, and Base10 support

New features

AOT and trimming compatibility
Base2, Base8, and Base10 support

Improvements

Base58 now uses DividingCoder under the hood for less code duplication
Several implementations now take bytesWritten into account when returning buffers, reducing the possibility of returning a buffer larger than necessary.

Additional notes

5.3.0

New features

AOT and trimming compatibility
Base2, Base8, and Base10 support (w/Multibase)

Improvements

Base58 now uses DividingCoder under the hood for less code duplication
Several implementations now take bytesWritten into account when returning buffers, reducing the possibility of returning a buffer larger than necessary.

Open source →

5.0.09 May 2025Breaking

The target framework was changed to .NET 8.0 around 4.2.0, but the version change did not reflect that breaking change, although in practice it should…

Breaking changes

TryDecode/TryEncode methods no longer throw
Base85 methods with Ipv6 in them renamed to IPv6 to match with .NET
numBytesWritten parameters have all been renamed to bytesWritten to match with .NET
The target framework was changed to .NET 8.0 around 4.2.0, but the version change did not reflect that breaking change, although in practice it shouldn't cause many issues.

New features

Base62
Base45
Multibase now supports Base45
Base32 now has a non-throwing TryDecodeUInt64() method

Improvements

Multibase.Encode() now allocates less memory

Open source →

4.2.029 Apr 2025

Monero Base58 algorithm support with MoneroBase58 class. It can be accessed as Base58.Monero

New features

Monero Base58 algorithm support with MoneroBase58 class. It can be accessed as Base58.Monero

Improvements

Eliminate some memory allocations

Fixes

Throw ArgumentOutOfRangeException with correct parameters in Base32.DecodeInt64()

Open source →

4.0.219 Sept 2024

Fixes #59 - Base32's Encode(ulong) and DecodeUInt64() works consistently among platforms with different endianness

Fixes

Fixes #59 - Base32's Encode(ulong) and DecodeUInt64() works consistently among platforms with different endianness

Open source →

4.0.010 Nov 2022

This version is built with .NET 6 SDK.

Breaking changes

This version is built with .NET 6 SDK.
Benchmark now uses BenchmarkDotNet.
Changed interface names from Encoder to Coder to signify encoding and decoding functionality better.
Removed obsolete methods.
Simple (aka allocating) versions of Decode() will now return byte[]'s instead of Span<byte>'s for correct ownership semantics. It's even possible that some copying may be avoided in certain scenarios.
Base16.TryDecode() doesn't throw on invalid input, but returns false instead.
Base32.Decode() throws separate exceptions for encountered failures.

New features

Added Bech32 flavor to Base32
Added RFC 1924 (IPv6) flavor to Base85 along with EncodeIpv6 and DecodeIpv6 functions https://tools.ietf.org/html/rfc1924
Added Base58.Bitcoin.EncodeCheck() and Base58.Bitcoin.TryDecodeCheck() methods.
Added Base58.Bitcoin.EncodeCb58() and Base58.Bitcoin.TryDecodeCb58() methods.

Improvements

Added more buffer overflow detection to Base32 coder
Removed all unsafe code. New Span<T>-based optimizations make the code come close to unsafe perf.
Removed slow and hard to read optimizations like bit shift operations for multiplication and division where compiler almost always does a better job of optimizing.

Fixes

Fixed output buffer was too small error for certain Base58 cases.
Avoid redundant memory copy operations

Open source →