URL Encoder

The URL Encoder converts plain text into percent-encoded format so it can be safely included in URLs, query strings, and form data. URLs have a restricted set of characters that are allowed without encoding. Characters such as spaces, ampersands, question marks, hash signs, and non-ASCII letters must be replaced with percent-encoded sequences before they can appear in a URL without causing parsing errors or unintended behavior.

This tool uses the standard encodeURIComponent function, which encodes every character that is not an unreserved URI character (letters, digits, hyphens, underscores, periods, and tildes). Each encoded character is represented as a percent sign followed by two hexadecimal digits corresponding to the character's UTF-8 byte value. For example, a space becomes %20, an ampersand becomes %26, and a Unicode character like the euro sign becomes %E2%82%AC.

URL encoding is essential whenever you build URLs programmatically, construct query parameters from user input, generate API request strings, or create shareable links that contain special characters. Without proper encoding, a URL with spaces or reserved characters may break in browsers, get truncated by email clients, or produce incorrect results on the server.

The tool handles the full Unicode range, so it works correctly with text in any language, including Chinese, Arabic, Cyrillic, and emoji. All processing happens locally in your browser, with no data sent to any server. Paste your text, see the encoded result instantly, and copy the URL-safe string.