Fake Useragent Save

Up-to-date simple useragent faker with real world database

Project README

Test & Deploy fake-useragent


Up-to-date simple useragent faker with real world database


  • Grabs up to date useragent from useragentstring.com
  • Back-up cache server if site above is down
  • Store local cache file for improved performance


pip install fake-useragent


from fake_useragent import UserAgent
ua = UserAgent()

# Mozilla/5.0 (Windows; U; MSIE 9.0; Windows NT 9.0; en-US);
# Mozilla/5.0 (compatible; MSIE 10.0; Macintosh; Intel Mac OS X 10_7_3; Trident/6.0)'
ua['Internet Explorer']
# Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB7.4; InfoPath.2; SV1; .NET CLR 3.3.69573; WOW64; en-US)
# Opera/9.80 (X11; Linux i686; U; ru) Presto/2.8.131 Version/11.11
# Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.2 (KHTML, like Gecko) Chrome/22.0.1216.0 Safari/537.2'
# Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_4) AppleWebKit/537.13 (KHTML, like Gecko) Chrome/24.0.1290.1 Safari/537.13
ua['google chrome']
# Mozilla/5.0 (X11; CrOS i686 2268.111.0) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11
# Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:16.0.1) Gecko/20121011 Firefox/16.0.1
# Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:15.0) Gecko/20100101 Firefox/15.0.1
# Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5355d Safari/8536.25

# and the best one, get a random browser user-agent string


If you want to specify your own browser list, you can do that via the browsers argument (default is: ["chrome", "edge", "internet explorer", "firefox", "safari", "opera"]).

from fake_useragent import UserAgent
ua = UserAgent(browsers=['edge', 'chrome'])

fake-useragent store collected data at your os temp dir, like /tmp

If you want to update saved database just:

from fake_useragent import UserAgent
ua = UserAgent()

If you don't want cache database or no writable file system:

from fake_useragent import UserAgent
ua = UserAgent(cache=False)

Sometimes, useragentstring.com changes their html or is down, in such case fake-useragent uses the following hosted cache server as fallback.

If you don't want to use hosted cache server (version 0.1.5 added).

from fake_useragent import UserAgent
ua = UserAgent(use_cache_server=False)

In very rare case, if hosted cache server and sources will be unavailable fake-useragent won't be able to download data: (version 0.1.3 added)

from fake_useragent import UserAgent
ua = UserAgent()

# Traceback (most recent call last):
#   ...
# fake_useragent.errors.FakeUserAgentError

# you can catch it via

from fake_useragent import FakeUserAgentError

    ua = UserAgent()
except FakeUserAgentError:

If you will try to get unknown browser: (version 0.1.3 changed)

from fake_useragent import UserAgent
ua = UserAgent()
# Traceback (most recent call last):
#   ...
# fake_useragent.errors.FakeUserAgentError

You can completely disable ANY annoying exception with adding fallback: (version 0.1.4 added)

import fake_useragent

ua = fake_useragent.UserAgent(fallback='your favorite Browser')
# in case if something went wrong, one more time it is REALLY!!! rare case
ua.random == 'your favorite Browser'

Want to control location of data file? (version 0.1.4 added)

import fake_useragent

# I am strongly! recommend using a version suffix
location = '/home/user/fake_useragent%s.json' % fake_useragent.VERSION

ua = fake_useragent.UserAgent(path=location)

If you need to safe some attributes from overriding them in UserAgent by __getattr__ method use safe_attrs you can pass there attributes names. At least this will prevent you from raising FakeUserAgentError when attribute not found.

For example, when using fakeuseragent with injections <https://github.com/tailhook/injections> you need to:

import fake_useragent

ua = fake_useragent.UserAgent(safe_attrs=('__injections__',))

Please, do not use if you don't understand why you need this. This is magic for rarely extreme case.

Experiencing issues???

Make sure that you using latest version!!!

pip install --upgrade fake-useragent

Check version via python console: (version 0.1.4 added)

import fake_useragent


And you are always welcome to post issues.

Please do not forget mention version that you are using.


pip install -r requirements.txt


  • 0.1.14 November 5, 2022

    • Improve code quality standards using modern Python >=3.7 syntax
    • Migrated to pyproject.toml build system format + syntax check
    • Add additional classifiers to the toml file
    • Improved tox.ini file
    • Improved GitHub Actions job using pip cache
    • And various small fixes
  • 0.1.13 October 21, 2022

    • Implement browsers argument, allowing you to override the browser names you want to use
    • Fix browser listing of Internet Explorer and Edge
    • Don't depend on w3schools.com anymore
    • Clean-up data (temp) file format
    • Update fallback cache server URL / use JSON Lines as file format
    • Move to GitHub Actions instead of Travis
    • Using black Python formatter in favour of Flake
  • 0.1.12 March 31, 2022

    • forked
  • 0.1.11 October 4, 2018

    • moved s3 + cloudfront fallback to heroku.com, cuz someone from Florida did ~25M requests last month
  • 0.1.10 February 11, 2018

    • Minor fix docs cloudfront url
  • 0.1.9 February 11, 2018

    • fix w3schools.com renamed IE/Edge to Edge/IE
    • moved heroku.com fallback to s3 + cloudfront
    • stop testing Python3.3 and pypy
  • 0.1.8 November 2, 2017

    • fix useragentstring.com Can't connect to local MySQL server through socket
  • 0.1.7 April 2, 2017

    • fix broken README.rst
  • 0.1.6 April 2, 2017

    • fixes bug use_cache_server do not affected anything
    • w3schools.com <https://www.w3schools.com/browsers/browsers_stats.asp>_ moved to https
    • verify_ssl options added, by default it is True (urllib.urlopen ssl context for Python 2.7.9- and 3.4.3- is not supported)
  • 0.1.5 February 28, 2017

    • added ua.edge alias to Internet Explorer
    • w3schools.com starts displaying Edge statistic
    • Python 2.6 is not tested anymore
    • use_cache_server option added
    • Increased fake_useragent.settings.HTTP_TIMEOUT to 5 seconds
  • 0.1.4 December 14, 2016

    • Added custom data file location support
    • Added fallback browser support, in case of unavailable data sources
    • Added alias fake_useragent.FakeUserAgent for fake_useragent.UserAgent
    • Added alias fake_useragent.UserAgentError for fake_useragent.FakeUserAgentError
    • Reduced fake_useragent.settings.HTTP_TIMEOUT to 3 seconds
    • Started migration to new data file format
    • Simplified a lot 4+ years out of date code
    • Better thread/greenlet safety
    • Added verbose logging
    • Added safe_attrs for prevent overriding by __getattr__
  • 0.1.3 November 24, 2016

    • Added hosted data file, when remote services is unavailable
    • Raises fake_useragent.errors.FakeUserAgentError in case when there is not way to download data
    • Raises fake_useragent.errors.FakeUserAgentError instead of None in case of unknown browser
    • Added gevent.sleep support in gevent patched environment when trying to download data
  • X.X.X xxxxxxx xx, xxxx

    • xxxxx ?????


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