What is URL encoding?

URL encoding (percent-encoding) replaces unsafe characters in URLs with a % followed by their hexadecimal value. For example, spaces become %20.

When do I need to URL encode?

URL encode when passing special characters in query parameters, form data, or API requests. Characters like &, =, ?, #, and spaces must be encoded.

What is the difference between encodeURI and encodeURIComponent?

encodeURI encodes a full URI but preserves : / ? #. encodeURIComponent encodes everything, suitable for individual query parameter values.

URL Encoder

What Is a URL Encoder?

A URL encoder converts text or special characters into a percent-encoded format that is safe to transmit inside a Uniform Resource Locator (URL). URLs can only be sent over the internet using the ASCII character set, which means characters outside that set — such as spaces, ampersands, question marks, and non-Latin letters — must be replaced with a % sign followed by two hexadecimal digits. For example, a space becomes %20, an ampersand (&) becomes %26, and an equals sign (=) becomes %3D. Without proper encoding, a URL can be misinterpreted by browsers, web servers, and APIs, leading to broken links, failed requests, or security vulnerabilities like parameter injection. URL encoding is defined by RFC 3986 and is a fundamental requirement for building reliable web applications, REST APIs, and query strings.

How to Use the URL Encoder

Paste or type your text into the input box. This can be a full URL, a query string parameter value, a path segment, or any raw text you want to encode.
Click "Encode" to instantly convert every special character into its percent-encoded equivalent.
Copy the output and paste it directly into your URL, API request, or form field. The encoded string is ready to use without any further modification.

The encoder handles all reserved characters (: / ? # [ ] @ ! $ & ' ( ) * + , ; =) as well as spaces and Unicode characters, ensuring your encoded output is 100% URL-safe.

Common Use Cases

Building query strings: Encode parameter values before appending them to a URL to prevent breaking the query string structure.
REST API requests: Encode path segments and filter values when constructing API endpoints programmatically.
Sharing search URLs: Encode search terms that contain spaces or special characters so the link works correctly in every browser.
Form submissions: Ensure form data sent via GET method is properly encoded to avoid server-side parsing errors.
Email links: Encode mailto body and subject parameters that include line breaks or special symbols.
Analytics & tracking: Safely encode UTM parameters and campaign values that may include slashes or ampersands.