URL Encode / Decode

The URL Encode / Decode tool helps developers work with percent-encoded URLs. URL encoding (also called percent-encoding) replaces unsafe characters with a %HH escape sequence so they can be safely transmitted in URLs, query strings, and form data. For binary data in URLs, consider Base64 encoding with the URL-safe variant.

This tool offers four modes. Encode converts plain text into a URL-safe string. Decode reverses the process. Parse breaks a full URL into its components — protocol, host, port, path, query parameters, and fragment — so you can inspect each piece. Build lets you construct a URL from a base address and a list of key-value query parameters.

You can choose between component encoding ( encodeURIComponent) and full URL encoding (encodeURI). Component encoding is stricter and encodes characters like /, ?, and &, making it suitable for individual query-parameter values. Full URL encoding leaves the URL structure intact and only encodes characters that are never valid in a URI.

Everything runs client-side in your browser using the native encodeURI, encodeURIComponent, and URL APIs. No data is sent to any server, making it safe for URLs that contain tokens, API keys, or other sensitive parameters. To validate URL patterns programmatically, try the Regex Tester with a URL matching pattern.

1. Choose a mode from the tabs: Encode, Decode, Parse, or Build.
2. In Encode / Decode mode, paste your text and see the result instantly. Toggle Component to switch between encodeURIComponent and encodeURI.
3. In Parse mode, paste a full URL to see its protocol, host, path, query parameters, and fragment.
4. In Build mode, enter a base URL and add key-value pairs. The generated URL updates as you type.
5. Click Copy or press Ctrl+Shift+C to copy the output.