Query Sanitization: URL Encoding

RFC 3986 and Percent-Encoding

URLs are restricted to a small set of 'unreserved' characters (letters, numbers, and a few symbols). Everything else must be 'Percent-Encoded.' For example, a space becomes %20, and an ampersand becomes %26. If you fail to encode these, a backend server might interpret your data as a new query parameter, leading to broken logic or security flaws. Our tool follows the strict RFC 3986 standard, ensuring your parameters are safe for any environment. Use this when building complex requests in our Curl Generator.

Encoding vs. Escaping

While often used interchangeably, 'Encoding' a URL is different from 'Escaping' HTML. URL encoding prepares data for transport in a URI, while HTML escaping protects against Cross-Site Scripting (XSS). Our tool is specialized for the former, providing a visual way to see how your strings transform. For creating the content that goes into these URLs, use our Markdown Editor. If you're handling binary data in URLs, use our Base64 Encoder first to ensure it stays in a readable range.

Debugging Malformed URLs

A common source of '400 Bad Request' errors is a malformed URL. Our 'Decoder' mode allows you to take a complex, encoded URL from your logs and translate it back into human-readable text. This helps you identify if an automated system is double-encoding parameters or if a client is sending invalid characters. Once you've identified the issue, use our Case Converter to ensure your query keys follow your API's naming conventions (like camelCase or snake_case).

Privacy and Local Processing

URLs often contain PII (Personally Identifiable Information) or tracking tokens. Processing these on a third-party server is a privacy risk. Our encoder runs 100% locally in your browser. No logs are kept, and no data is transmitted. This allows you to sanitize production links safely. For generating the unique identifiers used in these links, see our UUID Generator. After generating your encoded URL, use our QR Generator to create a scannable link for your mobile users.