HTML numeric character references, CSS special characters, JavaScript special characters, URL components, IDN domains converter

It works with all character sets supported by your operating system and can convert Supplementary Planes code points which some other converters fails to process properly (like that: 𝌆 U+1D306 tetragram for centre). URL path components encoding conforms to RFC 3986, query and fragment encoding use "+" to encode " " for historical reasons. RFC 6068 used for mailto: and RFC 5538 used for news: and nntp: schemes. IDNA encoding conforms to RFC 3492 and RFC 5891.

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You can use this result with any HTML document or CSS character set or with any JavaScript script character set.
Note: backslash (\) must be already escaped for CSS and JavaScript using (\\) form, the converter doesn't check it.