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2.6K Stars 835 Forks MIT License 3.5K Commits 147 Opened issues


Python HTTP library with thread-safe connection pooling, file post support, user friendly, and more.

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urllib3 is a powerful, user-friendly HTTP client for Python. Much of the Python ecosystem already uses urllib3 and you should too. urllib3 brings many critical features that are missing from the Python standard libraries:

  • Thread safety.
  • Connection pooling.
  • Client-side SSL/TLS verification.
  • File uploads with multipart encoding.
  • Helpers for retrying requests and dealing with HTTP redirects.
  • Support for gzip, deflate, and brotli encoding.
  • Proxy support for HTTP and SOCKS.
  • 100% test coverage.

urllib3 is powerful and easy to use:

.. code-block:: python

>>> import urllib3
>>> http = urllib3.PoolManager()
>>> r = http.request('GET', '')
>>> r.status
'User-agent: *\nDisallow: /deny\n'


urllib3 can be installed with

$ python -m pip install urllib3

Alternatively, you can grab the latest source code from

$ git clone git://
$ python install


urllib3 has usage and reference documentation at 


urllib3 has a

community Discord channel 
_ for asking questions and collaborating with other contributors. Drop by and say hello 👋


urllib3 happily accepts contributions. Please see our

contributing documentation 
_ for some tips on getting started.

Security Disclosures

To report a security vulnerability, please use the

Tidelift security contact 
_. Tidelift will coordinate the fix and disclosure with maintainers.


  • @sethmlarson 
    __ (Seth M. Larson)
  • @pquentin 
    __ (Quentin Pradet)
  • @theacodes 
    __ (Thea Flowers)
  • @haikuginger 
    __ (Jess Shapiro)
  • @lukasa 
    __ (Cory Benfield)
  • @sigmavirus24 
    __ (Ian Stapleton Cordasco)
  • @shazow 
    __ (Andrey Petrov)



If your company benefits from this library, please consider

sponsoring its

For Enterprise

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  • - |tideliftlogo|
    • Professional support for urllib3 is available as part of the
      _. Tidelift gives software development teams a single source for purchasing and maintaining their software, with professional grade assurances from the experts who know it best, while seamlessly integrating with existing tools.

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