The URL Encoder / Decoder is an essential tool for web developers and anyone working with web addresses. URLs can only contain a specific set of characters. This tool allows you to encode a string, converting special characters (like spaces, slashes, or symbols) into a URL-safe format (`%xx` percent-encoding). Conversely, it can decode a URL-encoded string back into its original, human-readable form. This is crucial for correctly passing data in URL query strings or ensuring that URLs are valid and work as expected.

To Encode:

1. Select the "Encode" tab.
2. Type or paste your string with special characters into the "Decoded String" text area.
3. Click the "Encode" button.
4. The URL-safe, encoded string will appear in the "Encoded String" text area on the right.

To Decode:

1. Select the "Decode" tab.
2. Paste a URL-encoded string into the "Encoded String" text area.
3. Click the "Decode" button.
4. The original, decoded string will appear in the "Decoded String" text area on the right.