URL encoder/decoder — https://mothereff.in/url
Author: Mathias Bynens
Observed on 2026-10-23 in the official browser UI.
Input: C++ & tea
Output: C%2B%2B%20%26%20tea
Reverse input: a%2Bb
Reverse output: a+b
This is an editorial record of the displayed values, not a file exported by the tool.