Free Online URL Percent Encoder & Decoder Tool

Mastering URL Percent Encoding and Decoding for Web Development

When transmitting data across the internet via Uniform Resource Identifiers (URIs), special characters, spaces, and punctuation marks must be translated into a universally accepted format. This process is known as URL percent encoding (or URI encoding). Our free online URL percent encoder and decoder tool provides a seamless, client-side utility for developers, QA engineers, and SEO specialists who need to prepare clean, valid URLs or debug complex query strings.

Why Do You Need a URL Encoder and Decoder?

Web browsers and servers strictly interpret characters according to standard specifications. If a URL contains unsafe characters—such as spaces, ampersands, or non-ASCII symbols—it can break links, corrupt API requests, or cause unexpected server errors. By leveraging our robust percent encoding tool, you ensure that every query parameter and path segment conforms strictly to web standards.

• Prevent Broken Links: Safely convert spaces and special punctuation into valid hexadecimal escape sequences (e.g., replacing spaces with %20).
• API Payload and Query String Safety: Properly format parameters for RESTful APIs and GET requests without manual conversion errors.
• Client-Side Security and Speed: All encoding and decoding operations happen directly inside your web browser using native JavaScript, ensuring absolute privacy for sensitive string data.

How to Use This Tool

Using the tool is straightforward. Simply paste your raw text or encoded URL into the top input box. Click Encode URL to transform standard text into a URL-safe format using encodeURIComponent(), or click Decode URL to translate a percent-encoded string back into plain, human-readable text. Finally, use the copy button to instantly transfer your results to your clipboard for rapid deployment in your codebase.