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此工具是一个 url 编码或 url 解码在线工具，对 url 中的保留字符进行百分号编码。. It is an acronym for uniform resource locator. a url is an address that browsers probe in order to connect to a web server. two example url's could be: url's strictly use the ascii character set to send data across the internet. they, therefore, must be encoded before being sent.