An easy, HTML5, whitelisting HTML sanitizer.
Python
Latest commit 5cd9bcf Nov 30, 2016 @willkg willkg Clarify strip argument for bleach.clean
It wasn't particularly clear that strip changes the behavior of
bleach.clean for tags not listed in the whitelist. This clarifies that a
bit.

Fixes #237

README.rst

Bleach

https://travis-ci.org/mozilla/bleach.png?branch=master

Bleach is a whitelist-based HTML sanitizing library that escapes or strips markup and attributes.

Bleach can also linkify text safely, applying filters that Django's urlize filter cannot, and optionally setting rel attributes, even on links already in the text.

Bleach is intended for sanitizing text from untrusted sources. If you find yourself jumping through hoops to allow your site administrators to do lots of things, you're probably outside the use cases. Either trust those users, or don't.

Because it relies on html5lib, Bleach is as good as modern browsers at dealing with weird, quirky HTML fragments. And any of Bleach's methods will fix unbalanced or mis-nested tags.

The version on GitHub is the most up-to-date and contains the latest bug fixes. You can find full documentation on ReadTheDocs.

Code:https://github.com/mozilla/bleach
Documentation:https://bleach.readthedocs.io/
Issue tracker:https://github.com/mozilla/bleach/issues
IRC:#bleach on irc.mozilla.org
License:Apache License v2; see LICENSE file

Reporting Bugs

For regular bugs, please report them in our issue tracker.

If you believe that you've found a security vulnerability, please file a secure bug report in our bug tracker or send an email to security AT mozilla DOT org.

For more information on security-related bug disclosure and the PGP key to use for sending encrypted mail or to verify responses received from that address, please read our wiki page at https://www.mozilla.org/en-US/security/#For_Developers.

Installing Bleach

Bleach is available on PyPI, so you can install it with pip:

$ pip install bleach

Or with easy_install:

$ easy_install bleach

Or by cloning the repo from GitHub:

$ git clone git://github.com/mozilla/bleach.git

Then install it by running:

$ python setup.py install

Upgrading Bleach

Warning

Before doing any upgrades, read through Bleach Changes for backwards incompatible changes, newer versions, etc.

Basic use

The simplest way to use Bleach is:

>>> import bleach

>>> bleach.clean('an <script>evil()</script> example')
u'an &lt;script&gt;evil()&lt;/script&gt; example'

>>> bleach.linkify('an http://example.com url')
u'an <a href="http://example.com" rel="nofollow">http://example.com</a> url