URL Encoding vs Percent Encoding — Are They the Same Thing?

Most developers use these two terms interchangeably. Stack Overflow threads mix them up. Documentation switches between them mid-paragraph. Even MDN uses both terms in the same article.

So are they the same thing — or is there a real difference?

Short answer: they refer to the same mechanism, but come from different contexts. Understanding which is which will save you from some genuinely painful debugging sessions.

What is URL Encoding?

URL encoding is the informal, developer-facing term for converting unsafe characters in a URL into a format that can be safely transmitted over the internet.

URL Encoding vs Percent Encoding — Are They the Same Thing?

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