Runs locally
URL encoder and decoder
Encode a query value, or decode a percent-encoded string you copied from a messy link.
encodeURIComponent
decodeURIComponent
Then save the useful bits
These tools do not create a Markwise account. When you want the file in a library you can ask, start free and save a link. The file you just inspected is still on your machine.
Questions
Is this encodeURI or encodeURIComponent?+
Component encoding — reserved characters like &, =, and ? are escaped, which is what you want for a single query value.