URL Encoder / Decoder
Encode and decode URLs and URI components for web development.
URL encoding (also known as percent-encoding) is a mechanism for converting special characters in URLs into a format that can be transmitted over the internet. Since URLs can only contain a limited set of characters from the ASCII character set, any characters outside this set must be encoded.
Our tool supports four operations: encodeURI (encodes a full URI, preserving special URL characters like :, /, ?, #, @), decodeURI (reverses encodeURI), encodeURIComponent (encodes everything including URL-special characters, ideal for query parameter values), and decodeURIComponent (reverses encodeURIComponent).
Understanding the difference between encodeURI and encodeURIComponent is crucial for web developers. Use encodeURI when working with complete URLs, and encodeURIComponent when encoding individual query parameters or path segments. Incorrect usage can lead to broken URLs or security vulnerabilities.
Proper URL encoding is essential for web development, preventing broken links, security issues, and data corruption. Our tool provides all four standard encoding/decoding operations in one interface.
- Paste the URL or text you want to encode/decode
- Choose the encoding method (URI or Component)
- Copy the result to use in your project
- Use encodeURIComponent for individual query parameter values, not the entire URL.
- Use encodeURI when you want to encode a full URL but keep the structure intact.
- Always encode user-generated content before inserting it into URLs to prevent injection attacks.
- Spaces can be encoded as %20 (standard) or + (application/x-www-form-urlencoded) — know which your API expects.
- Double-encoding can cause issues — decode first to check if content is already encoded.