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+Base64Url
+==============
+
+[![Hex.pm](https://img.shields.io/hexpm/v/base64url.svg)](https://hex.pm/packages/base64url)
+
+Standalone [URL safe](http://tools.ietf.org/html/rfc4648) base64-compatible codec.
+
+Usage
+--------------
+
+URL-Safe base64 encoding:
+```erlang
+base64url:encode(<<255,127,254,252>>).
+<<"_3_-_A">>
+base64url:decode(<<"_3_-_A">>).
+<<255,127,254,252>>
+```
+
+Vanilla base64 encoding:
+```erlang
+base64:encode(<<255,127,254,252>>).
+<<"/3/+/A==">>
+```
+
+Some systems in the wild use base64 URL encoding, but keep the padding for MIME compatibility (base64 Content-Transfer-Encoding). To interact with such systems, use:
+```erlang
+base64url:encode_mime(<<255,127,254,252>>).
+<<"_3_-_A==">>
+base64url:decode(<<"_3_-_A==">>).
+<<255,127,254,252>>
+```
+
+Thanks
+--------------
+
+To authors of [this](https://github.com/basho/riak_control/blob/master/src/base64url.erl) and [this](https://github.com/mochi/mochiweb/blob/master/src/mochiweb_base64url.erl).
+
+[License](base64url/blob/master/LICENSE.txt)
+-------
+
+Copyright (c) 2013 Vladimir Dronnikov <dronnikov@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.