A fork and successor of the Sulley Fuzzing Framework
2,357
stars
1,365
commits
Python
primary language
Aug 6, 2026
updated
.. image:: https://github.com/jtpereyda/boofuzz/raw/master/artwork/boo-logo-dark.svg
:width: 60%
:alt: boofuzz logo
boofuzz: Network Protocol Fuzzing for Humans
============================================
.. image:: https://github.com/jtpereyda/boofuzz/actions/workflows/test.yml/badge.svg?branch=master
:target: https://github.com/jtpereyda/boofuzz/actions/workflows/test.yml
.. image:: https://readthedocs.org/projects/boofuzz/badge/?version=latest
:target: https://boofuzz.readthedocs.io/
:alt: Documentation Status
.. image:: https://img.shields.io/pypi/v/boofuzz.svg
:target: https://pypi.org/project/boofuzz/
.. image:: https://badges.gitter.im/jtpereyda/boofuzz.svg
:alt: Join the chat at https://gitter.im/jtpereyda/boofuzz
:target: https://gitter.im/jtpereyda/boofuzz
.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
:target: https://github.com/psf/black
Boofuzz is a fork of and the successor to the venerable `Sulley`_ fuzzing
framework. Besides numerous bug fixes, boofuzz aims for extensibility.
The goal: fuzz everything.
.. figure:: https://github.com/jtpereyda/boofuzz/raw/master/_static/boofuzz-screenshot.png
:alt: boofuzz screenshot
Why?
----
Sulley has been the preeminent open source fuzzer for some time, but has
fallen out of maintenance.
Features
--------
Like Sulley, boofuzz incorporates all the critical elements of a fuzzer:
- Easy and quick data generation.
- Instrumentation – AKA failure detection.
- Target reset after failure.
- Recording of test data.
Unlike Sulley, boofuzz also features:
- Online `documentation`_.
- Support for arbitrary communications mediums.
- Built-in support for serial fuzzing, ethernet- and IP-layer, UDP broadcast.
- Better recording of test data -- consistent, thorough, clear.
- Test result CSV export.
- *Extensible* instrumentation/failure detection.
- Much easier install experience!
- Far fewer bugs.
Sulley is affectionately named after the giant teal and purple creature
from Monsters Inc. due to his fuzziness. Boofuzz is likewise named after
the only creature known to have scared Sulley himself: Boo!
.. figure:: https://github.com/jtpereyda/boofuzz/raw/master/_static/boo.png
:alt: Boo from Monsters Inc
Boo from Monsters Inc
Installation
------------
::
pip install boofuzz
Boofuzz installs as a Python library used to build fuzzer scripts. See
`INSTALL.rst`_ for advanced and detailed instructions.
Documentation
-------------
Documentation is available at https://boofuzz.readthedocs.io/, including nifty quickstart guides.
Contributions
-------------
Pull requests are welcome, as boofuzz is actively maintained (at the
time of this writing ;)). See `CONTRIBUTING.rst`_.
Community
---------
For questions that take the form of “How do I… with boofuzz?” or “I got
this error with boofuzz, why?”, consider posting your question on Stack
Overflow. Make sure to use the ``fuzzing`` tag.
If you’ve found a bug, or have an idea/suggestion/request, file an issue
here on GitHub.
For other questions, check out boofuzz on `gitter`_ or `Google Groups`_.
For updates, follow `@b00fuzz`_ on Twitter.
.. _Sulley: https://github.com/OpenRCE/sulley
.. _Google Groups: https://groups.google.com/d/forum/boofuzz
.. _gitter: https://gitter.im/jtpereyda/boofuzz
.. _@b00fuzz: https://twitter.com/b00fuzz
.. _documentation: https://boofuzz.readthedocs.io/
.. _INSTALL.rst: INSTALL.rst
.. _CONTRIBUTING.rst: CONTRIBUTING.rst
Not written in Markdown, so it's shown here as plain text — view it formatted on GitHub.
Python
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A fork and successor of the Sulley Fuzzing Framework
2,357
stars
1,365
commits
Python
primary language
Aug 6, 2026
updated
.. image:: https://github.com/jtpereyda/boofuzz/raw/master/artwork/boo-logo-dark.svg
:width: 60%
:alt: boofuzz logo
boofuzz: Network Protocol Fuzzing for Humans
============================================
.. image:: https://github.com/jtpereyda/boofuzz/actions/workflows/test.yml/badge.svg?branch=master
:target: https://github.com/jtpereyda/boofuzz/actions/workflows/test.yml
.. image:: https://readthedocs.org/projects/boofuzz/badge/?version=latest
:target: https://boofuzz.readthedocs.io/
:alt: Documentation Status
.. image:: https://img.shields.io/pypi/v/boofuzz.svg
:target: https://pypi.org/project/boofuzz/
.. image:: https://badges.gitter.im/jtpereyda/boofuzz.svg
:alt: Join the chat at https://gitter.im/jtpereyda/boofuzz
:target: https://gitter.im/jtpereyda/boofuzz
.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
:target: https://github.com/psf/black
Boofuzz is a fork of and the successor to the venerable `Sulley`_ fuzzing
framework. Besides numerous bug fixes, boofuzz aims for extensibility.
The goal: fuzz everything.
.. figure:: https://github.com/jtpereyda/boofuzz/raw/master/_static/boofuzz-screenshot.png
:alt: boofuzz screenshot
Why?
----
Sulley has been the preeminent open source fuzzer for some time, but has
fallen out of maintenance.
Features
--------
Like Sulley, boofuzz incorporates all the critical elements of a fuzzer:
- Easy and quick data generation.
- Instrumentation – AKA failure detection.
- Target reset after failure.
- Recording of test data.
Unlike Sulley, boofuzz also features:
- Online `documentation`_.
- Support for arbitrary communications mediums.
- Built-in support for serial fuzzing, ethernet- and IP-layer, UDP broadcast.
- Better recording of test data -- consistent, thorough, clear.
- Test result CSV export.
- *Extensible* instrumentation/failure detection.
- Much easier install experience!
- Far fewer bugs.
Sulley is affectionately named after the giant teal and purple creature
from Monsters Inc. due to his fuzziness. Boofuzz is likewise named after
the only creature known to have scared Sulley himself: Boo!
.. figure:: https://github.com/jtpereyda/boofuzz/raw/master/_static/boo.png
:alt: Boo from Monsters Inc
Boo from Monsters Inc
Installation
------------
::
pip install boofuzz
Boofuzz installs as a Python library used to build fuzzer scripts. See
`INSTALL.rst`_ for advanced and detailed instructions.
Documentation
-------------
Documentation is available at https://boofuzz.readthedocs.io/, including nifty quickstart guides.
Contributions
-------------
Pull requests are welcome, as boofuzz is actively maintained (at the
time of this writing ;)). See `CONTRIBUTING.rst`_.
Community
---------
For questions that take the form of “How do I… with boofuzz?” or “I got
this error with boofuzz, why?”, consider posting your question on Stack
Overflow. Make sure to use the ``fuzzing`` tag.
If you’ve found a bug, or have an idea/suggestion/request, file an issue
here on GitHub.
For other questions, check out boofuzz on `gitter`_ or `Google Groups`_.
For updates, follow `@b00fuzz`_ on Twitter.
.. _Sulley: https://github.com/OpenRCE/sulley
.. _Google Groups: https://groups.google.com/d/forum/boofuzz
.. _gitter: https://gitter.im/jtpereyda/boofuzz
.. _@b00fuzz: https://twitter.com/b00fuzz
.. _documentation: https://boofuzz.readthedocs.io/
.. _INSTALL.rst: INSTALL.rst
.. _CONTRIBUTING.rst: CONTRIBUTING.rst
Not written in Markdown, so it's shown here as plain text — view it formatted on GitHub.
Python
95.6%
HTML
1.4%
JavaScript
1.3%
Gherkin
1.2%