URL Encoder Online Free: How to Encode & Decode URLs Securely 2025

A single special character in the wrong place can break an entire web application. Understanding URL encoding—also known as percent-encoding—is the first step toward building robust, professional web systems.

What is URL Encoding?

URL encoding is a mechanism for encoding information in a Uniform Resource Identifier (URI). Characters that are not allowed in a URL must be replaced with a % followed by two hexadecimal digits representing the character's ASCII value.

Commonly Encoded Characters

• Space becomes %20
• & (Ampersand) becomes %26
• ? (Question Mark) becomes %3F
• # (Hash) becomes %23

Why You Need a URL Encoder Online Free Tool

When you pass data through a URL parameter (Query String), you must ensure that the data doesn't interfere with the URL's structure. For example, if your search query contains a &, the browser might think a new parameter is starting.

Using our URL Encoder/Decoder ensures your parameters are always "safe" for the open web.

The Privacy Advantage

Like all SoEasyHub developer tools, our URL converter processes your input entirely in your browser. Most other sites log your queries on their servers. If you are encoding sensitive redirect URLs or internal system paths, privacy is non-negotiable.

How to Use

1. Enter your string into the input box.
2. Click Encode for safe URL transmission.
3. Click Decode to see the human-readable version of an encoded URL.

Try it now: Secure URL Encoder/Decoder.