URL Encode
Percent-encode text for use in a URL, as one value or as a whole address.
Encode
URL
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Which mode to use
- One value (encodeURIComponent): For a search term or other query value: & = ? / # are encoded too, so the value cannot break the URL around it.
- Whole URL (encodeURI): For a complete address that contains spaces or non-ASCII letters: the characters that structure the URL are left as they are.
- Spaces become %20: Or + in the third mode, Form value, which writes values as HTML forms send them. The URL Decoder reads both.
Frequently asked questions
What is the difference between one value and a whole URL?
For "a&b=c": one-value mode gives a%26b%3Dc, which a server reads as a single value. Whole-URL mode keeps & and =, because in a full URL they separate parameters.
Why are letters like ü turned into two codes?
They take two bytes in UTF-8, and each byte gets its own %XX code: ü becomes %C3%BC.
Which characters are never encoded?
Letters A to Z and a to z, digits and - _ . ! ~ * ' ( ) stay as they are in both modes.