Why do I need to encode URLs?

URLs can only contain certain characters from the standard ASCII set. Characters outside this set, or characters with special meanings (like & or ?), must be encoded using percent-encoding to be transmitted safely over the web.

Is it safe to decode URLs containing sensitive data here?

Yes. rizentium processes all URL transformations locally in your browser memory. No data is ever sent to our servers, ensuring your query parameters and tokens remain private.

Free Online URL Encoder & Decoder | Sanitize URLs Instantly

instantly sanitize, encode, and decode url components. 100% secure client-side processing.

plain url / text

encoded output

Output will appear here...

How to Encode and Decode URLs Online

Our free online URL utility is designed for developers who need to safely transmit data via web addresses. URL encoding (also known as percent-encoding) replaces unsafe ASCII characters with a "%" followed by two hexadecimal digits. Whether you are formatting query parameters for an API request or cleaning up a complex redirect string, rizentium provides real-time, client-side processing with absolute privacy.

Key Use Cases

Sanitize query parameters for REST APIs
Encode special characters like &, ?, and #
Decode complex OAuth redirect URIs
Format search queries for web tracking
Prepare data for application/x-www-form-urlencoded requests

Security & Privacy

Most online tools log your URLs, potentially capturing sensitive session tokens or API keys. rizentium uses the standard encodeURIComponent and decodeURIComponent Web APIs entirely within your browser. No data ever leaves your device.

Frequently Asked Questions

What is the difference between encodeURI and encodeURIComponent?

encodeURI is intended for a full URL, while encodeURIComponent is intended for parts of a URL (like query parameters). Our tool uses encodeURIComponent because it provides more comprehensive escaping, including characters like '/' and ':'.

What are reserved characters in a URL?

Reserved characters are those that have a special meaning in a URI, such as ? (query start), # (fragment start), and & (parameter separator). Encoding ensures these characters are treated as data rather than syntax.

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