.. SETUP VARIABLES .. |license-status| image:: https://img.shields.io/badge/license-BSD%202--Clause-blue.svg :target: https://github.com/mayeut/pybase64/blob/master/LICENSE .. |pypi-status| image:: https://img.shields.io/pypi/v/pybase64.svg :target: https://pypi.python.org/pypi/pybase64 .. |python-versions| image:: https://img.shields.io/pypi/pyversions/pybase64.svg .. |rtd-status| image:: https://readthedocs.org/projects/pybase64/badge/?version=stable :target: http://pybase64.readthedocs.io/en/stable/?badge=stable :alt: Documentation Status .. |gha-status| image:: https://github.com/mayeut/pybase64/workflows/Build%20and%20upload%20to%20PyPI/badge.svg :target: https://github.com/mayeut/pybase64/actions?query=workflow%3A%22Build+and+upload+to+PyPI%22 .. |codecov-status| image:: https://codecov.io/gh/mayeut/pybase64/branch/master/graph/badge.svg :target: https://codecov.io/gh/mayeut/pybase64/branch/master .. END OF SETUP

Fast Base64 implementation

|license-status| |pypi-status| |python-versions| |rtd-status| |gha-status| |codecov-status|

This project is a wrapper on libbase64 <https://github.com/aklomp/base64>_.

It aims to provide a fast base64 implementation for base64 encoding/decoding.

Installation

.. code::

pip install pybase64

Usage

pybase64 uses the same API as Python base64 "modern interface" (introduced in Python 2.4) for an easy integration.

To get the fastest decoding, it is recommended to use the pybase64.b64decode and validate=True when possible.

.. code:: python

import pybase64

print(pybase64.b64encode(b'>>>foo???', altchars='_:'))
# b'Pj4_Zm9vPz8:'
print(pybase64.b64decode(b'Pj4_Zm9vPz8:', altchars='_:', validate=True))
# b'>>>foo???'

# Standard encoding helpers
print(pybase64.standard_b64encode(b'>>>foo???'))
# b'Pj4+Zm9vPz8/'
print(pybase64.standard_b64decode(b'Pj4+Zm9vPz8/'))
# b'>>>foo???'

# URL safe encoding helpers
print(pybase64.urlsafe_b64encode(b'>>>foo???'))
# b'Pj4-Zm9vPz8_'
print(pybase64.urlsafe_b64decode(b'Pj4-Zm9vPz8_'))
# b'>>>foo???'

.. begin cli

A command-line tool is also provided. It has encode, decode and benchmark subcommands.

.. code::

usage: pybase64 [-h] [-V] {benchmark,encode,decode} ...

pybase64 command-line tool.

positional arguments:
  {benchmark,encode,decode}
                        tool help
    benchmark           -h for usage
    encode              -h for usage
    decode              -h for usage

optional arguments:
  -h, --help            show this help message and exit
  -V, --version         show program's version number and exit

.. end cli

Full documentation on Read the Docs <http://pybase64.readthedocs.io/en/stable/?badge=stable>_.

Benchmark

.. begin benchmark

Running Python 3.7.2, Apple LLVM version 10.0.0 (clang-1000.11.45.5), Mac OS X 10.14.2 on an Intel Core i7-4870HQ @ 2.50GHz

.. code::

pybase64 0.5.0 (C extension active - AVX2)
bench: altchars=None, validate=False
pybase64._pybase64.encodebytes:   1734.776 MB/s (13,271,472 bytes -> 17,928,129 bytes)
pybase64._pybase64.b64encode:     4039.539 MB/s (13,271,472 bytes -> 17,695,296 bytes)
pybase64._pybase64.b64decode:     1854.423 MB/s (17,695,296 bytes -> 13,271,472 bytes)
base64.encodebytes:                 78.352 MB/s (13,271,472 bytes -> 17,928,129 bytes)
base64.b64encode:                  539.840 MB/s (13,271,472 bytes -> 17,695,296 bytes)
base64.b64decode:                  287.826 MB/s (17,695,296 bytes -> 13,271,472 bytes)
bench: altchars=None, validate=True
pybase64._pybase64.b64encode:     4156.607 MB/s (13,271,472 bytes -> 17,695,296 bytes)
pybase64._pybase64.b64decode:     4107.997 MB/s (17,695,296 bytes -> 13,271,472 bytes)
base64.b64encode:                  559.342 MB/s (13,271,472 bytes -> 17,695,296 bytes)
base64.b64decode:                  143.674 MB/s (17,695,296 bytes -> 13,271,472 bytes)
bench: altchars=b'-_', validate=False
pybase64._pybase64.b64encode:     2786.776 MB/s (13,271,472 bytes -> 17,695,296 bytes)
pybase64._pybase64.b64decode:     1124.136 MB/s (17,695,296 bytes -> 13,271,472 bytes)
base64.b64encode:                  322.427 MB/s (13,271,472 bytes -> 17,695,296 bytes)
base64.b64decode:                  205.195 MB/s (17,695,296 bytes -> 13,271,472 bytes)
bench: altchars=b'-_', validate=True
pybase64._pybase64.b64encode:     2806.271 MB/s (13,271,472 bytes -> 17,695,296 bytes)
pybase64._pybase64.b64decode:     2740.456 MB/s (17,695,296 bytes -> 13,271,472 bytes)
base64.b64encode:                  314.709 MB/s (13,271,472 bytes -> 17,695,296 bytes)
base64.b64decode:                  121.803 MB/s (17,695,296 bytes -> 13,271,472 bytes)

.. end benchmark

.. begin changelog

Changelog

Future

• Speed-up translation on aarch64
• Use ValueError instead of AssertionError on altchars length validation
• Add SBOM to PyPI wheels
• Add initial support for Python 3.15
• Deprecate accepting the + and / characters with an alternative alphabet when decoding
• Add wrapcol parameter to b64encode

1.4.3

• Publish Android Python 3.14 wheels
• Publish GraalPy v25 wheels

1.4.2

• Update base64 library (Windows ARM64 Neon support)
• Publish Python 3.14 wheels
• Publish Linux riscv64 wheels
• Publish Android wheels
• Publish iOS wheels
• Publish GraalPy wheels

1.4.1

• Publish PyPy 3.11 wheels
• Publish armv7l wheels

1.4.0

• Publish python 3.13 wheels
• Add support for free-threaded builds
• Add MSYS2 support for C-extension
• Better logging on base64 build failure when C-extension build is optional
• Drop python 3.6 & 3.7 support

1.3.2

• Update base64 library
• PyPy: fix wrong outcome with non C-contiguous buffer

1.3.1

• Add missing py.typed marker

1.3.0

• Update base64 library
• Add AVX512-VBMI implementation
• Rework extension build to remove adherence on distutils
• Publish python 3.12 wheels
• Documentation now uses furo theme

1.2.3

• Update base64 library
• Publish python 3.11 wheels

1.2.2

• Update base64 library
• Fix C extension build on musl distros
• Publish musllinux wheels

1.2.1

• Publish PyPy 3.8 (pypy38_pp73) wheels

1.2.0

• Release the GIL
• Publish CPython 3.10 wheels
• Drop python 3.5 support

1.1.4

• Add macOS arm64 wheel

1.1.3

• GitHub Actions: fix build on tag

1.1.2

• Add PyPy wheels
• Add aarch64, ppc64le & s390x manylinux wheels

1.1.1

• Move CI from TravisCI/AppVeyor to GitHub Actions
• Fix publication of Linux/macOS wheels

1.1.0

• Add b64encode_as_string, same as b64encode but returns a str object instead of a bytes object
• Add b64decode_as_bytearray, same as b64decode but returns a bytarray object instead of a bytes object
• Speed-Up decoding from UCS1 strings

1.0.2

• Update base64 library
• Publish python 3.9 wheels

1.0.1

• Publish python 3.8 wheels

1.0.0

• Drop python 3.4 support
• Drop python 2.7 support

0.5.0

• Publish python 3.7 wheels
• Drop python 3.3 support

0.4.0

• Speed-up decoding when validate==False

0.3.1

• Fix deployment issues

0.3.0

• Add encodebytes function

0.2.1

• Fixed invalid results on Windows

0.2.0

• Added documentation

• Added subcommands to the main script:

  • help
  • version
  • encode
  • decode
  • benchmark

0.1.2

• Updated base64 native library

0.1.1

• Fixed deployment issues

0.1.0

• First public release

.. end changelog