What is URL Encoding?

URL Encoding (also known as percent-encoding) is a mechanism used to safely encode information in a Uniform Resource Identifier (URI). Because URLs can only be sent over the Internet using the ASCII character-set, any special characters, spaces, or non-ASCII characters must be converted into a valid format.

How Percent-Encoding Works

When a character is encoded, it is replaced by a percent sign (%) followed by its two-digit hexadecimal equivalent. For example, a space becomes %20, and an ampersand (&) becomes %26. This is absolutely critical when passing parameters in a URL query string to ensure the web server parses the data correctly.

Client-Side Privacy

As with all utilities on DevvTools, our URL Encoder and Decoder operates entirely in your browser. Whether you are dealing with proprietary URL schemas, private API endpoints, or sensitive query strings, you can safely encode and decode them without transmitting any data over the network.