URL Encoding and Decoding: What Every Developer Should Know
Understand how URL encoding works, why it matters for web development, and how to properly encode and decode URLs.
What is URL Encoding?
URL encoding, also known as percent-encoding, converts characters into a format that can be transmitted over the internet. Special characters are replaced with a % followed by two hexadecimal digits representing the ASCII code of the character.
Why URL Encoding is Necessary
URLs can only contain certain characters from the ASCII set. Characters like spaces, quotes, and non-ASCII characters must be encoded to ensure reliable transmission. URL encoding ensures that data in URLs is correctly interpreted by web servers.
Common URL Encoding Examples
Spaces become %20, exclamation marks become %21, and non-ASCII characters like é become %C3%A9. Our URL Encoder tool handles all of these conversions automatically.
Difference Between encodeURI and encodeURIComponent
encodeURI encodes a complete URI but preserves characters that are part of the URI syntax. encodeURIComponent encodes everything, making it safe for use as a query parameter value.
URL Decoding Best Practices
Always decode URL parameters on the server side. When building URLs dynamically, always encode user-provided values to prevent URL injection and malformed URLs.
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