URL-encode and decode query strings and full URLs with encodeURI or encodeURIComponent. Component vs full URI, live conversion — free, private, no upload.
encodeURIComponent encodes reserved characters in a URL component (query values, path segments).
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Component mode percent-encodes reserved characters in a single piece of a URL — a search term, an email in a query, or a path segment with spaces. That is the function you want when you are building a query string by hand and a raw & or = would split the parameter.
Full URI mode leaves :, /, ?, and # intact so a complete address stays a complete address. Use it when you copied a whole link with spaces or Unicode and need it safe to paste, without turning the protocol and path into percent soup.
Switch between encode and decode on the same text. Decode restores percent sequences so you can read a messy access log or a redirected URL. Stats show how many sequences were encoded and the output size.
Encoding and decoding run locally. Query strings with session IDs, callback URLs, or internal paths never leave the tab. There is no upload and no account required.
Put a full link, a query value, or a percent-encoded string in the input. You do not need to pick a file.
Encode turns reserved characters into percent sequences. Decode reverses them so you can read the original text.
Use Component (encodeURIComponent) for a query value or path segment. Use Full URI (encodeURI) when you are encoding an entire URL.
Copy the output when the encoded sequences and size look right. Invalid percent sequences on decode show an error instead of a silent mash-up.
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