URL Encoder & Decoder
Percent-encode and decode URL components, parse full URLs into their constituent parts,
inspect and decode all query string parameters individually, and build query strings
from key-value pairs. Uses native encodeURIComponent(),
decodeURIComponent(), and the URL API.
Frequently Asked Questions
Why do URLs need encoding?
URLs can only contain a limited character set. Special characters must be percent-encoded — replaced with % and their hex code — to transmit safely.
What is the difference between encodeURI and encodeURIComponent?
encodeURI encodes a full URL, preserving structural characters like / and ?. encodeURIComponent encodes a single parameter value, also encoding those structural characters.
Is my URL data sent anywhere?
No. All encoding and decoding runs locally in your browser. Nothing is transmitted to any server.
When should I URL-encode user input?
Always encode user-provided values before inserting them into URL query parameters to prevent broken links and URL injection vulnerabilities.