Noticed strange codes like %20 or %3D in long URLs? These aren't errors or anything complicated — they're a simple standard way to make sure any data arrives correctly over the internet without conflicting with the URL's own core symbols.
The URL standard defines a set of special characters with specific functional meanings (like & to separate parameters, ? to start a query, and spaces aren't allowed at all). If your actual data (like a user's search term or a file name) contains these same characters, it needs to be encoded first so it doesn't conflict with the URL's own structure.
Every special or disallowed character is converted to a % sign followed by two hexadecimal digits representing that character's numeric value in the ASCII table. A space, for example, becomes %20 (since 20 is the hex representation of the space character), and an equals sign becomes %3D.
| Original character | Encoded form |
|---|---|
| Space | %20 |
| & | %26 |
| = | %3D |
| ? | %3F |
| / | %2F |
Using the URL Encoder/Decoder on Fawran Tools:
20 is the hex representation of the space character in ASCII, and % indicates what follows is an encoded code.
Yes, any character outside the basic allowed range needs encoding, turning into a long string of percent codes.
Only in the query string, + is accepted as a substitute, but %20 is the more precise standard accepted everywhere.
No, encoding is just a safe alternate representation, and the browser automatically decodes it to reach the same destination.
URL encoding is a simple mechanism to make sure your data arrives correctly without conflicting with the URL's own structure — once you understand the logic, you'll be able to read any encoded URL or build one yourself with full confidence.