URL Encoder & Decoder Online
Encode and decode URL components, query parameters, and special characters for safe use in web addresses.
Runs in your browser. No data leaves your device.
Frequently Asked Questions
How does the URL Encoder work?
Encoding uses JavaScript's encodeURIComponent() function, which converts each non-ASCII or reserved character to its UTF-8 byte sequence and represents each byte as %XX (percent sign followed by two hex digits). Decoding uses decodeURIComponent() to reverse the process. The tool also supports full-URL mode using encodeURI() which preserves structural characters like /, :, and ?.
What is URL encoding?
URL encoding replaces unsafe characters with percent-encoded equivalents (e.g., space becomes %20, & becomes %26). This ensures special characters in URLs are transmitted correctly by browsers and servers.
When do I need to URL encode?
Whenever you include user input, special characters, or non-ASCII text in URLs, query parameters, or form data. Common cases include building API URLs, generating links with parameters, and encoding file names.
What is the difference between encodeURI and encodeURIComponent?
encodeURI encodes a full URL but preserves characters like :, /, and ?. encodeURIComponent encodes everything except letters and numbers, making it safe for individual query parameter values.