What URL encoding standards should I be aware of?

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Grade: Education Subject: Support
What URL encoding standards should I be aware of?
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The most common standard is RFC 3986. URL-encoded characters are typically represented using percent-encoding, where a character is replaced by a `%` followed by its hexadecimal representation. For example, space is `%20`, and the plus sign is `%2B`. Always consult the relevant RFC for the most up-to-date specifications.