Developer
URL Encode / Decode
Percent-encode strings for safe use in URLs, or decode encoded text back to readable form. Pick the mode that matches what you're encoding — a single value (Component) or a full URL.
Direction
Mode
Encodes every reserved character — use for query values, path segments, form fields.
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Frequently asked questions
What's the difference between Component and Whole URL mode?
Component mode uses encodeURIComponent, which escapes every reserved character including / ? & = and # — use it for a single query value or path segment. Whole URL mode uses encodeURI, which preserves those structural characters so a complete URL stays usable.
What does URL encoding actually do?
It percent-encodes unsafe characters — a space becomes %20, an ampersand & becomes %26, and so on — so the text can travel safely inside a URL without breaking its structure or being misread by a server.
Is my text uploaded anywhere?
No. Encoding and decoding run entirely in your browser using the built-in JavaScript functions — nothing you type is ever sent to a server.
Does it handle emoji and accented characters?
Yes. Unicode characters such as café or 🚀 are encoded as their UTF-8 byte sequences in percent form and decode back to the original text exactly.