URL Encoder / Decoder

URL encoding, also called percent-encoding, replaces unsafe characters in a URL with a percent sign followed by two hex digits. This ensures special characters like spaces (%20), ampersands (%26), and equals signs (%3D) do not break your URL structure when passed as query parameters or API request values.

encodeURI preserves characters that form valid URL structure such as colons, slashes, and question marks, so it is best for encoding a complete URL. encodeURIComponent encodes nearly all special characters and is designed for encoding individual query parameter values or form data before appending them to a URL.

You should percent-encode any user input or special characters placed inside query strings, form submissions, or REST API parameters. Without proper URL encoding, reserved characters like &, =, and # can break your request, cause server errors, or create security vulnerabilities such as open redirect attacks.

Yes! All processing happens entirely in your browser. Your data is never sent to any server. No data is collected, stored, or transmitted.

The URL parser uses the browser URL API to split a full URL into protocol, hostname, port, pathname, query string, and hash fragment. Each query parameter is displayed as a separate key-value pair, making it easy to debug API endpoints, inspect deep links, or verify tracking parameters in marketing URLs.