URL Encoder / Decoder
Encode and decode URL components and full URLs.
Input
Output
What is a URL Encoder & Decoder?
URL encoding (percent-encoding) converts characters that are not allowed in URLs into a safe format using % followed by two hex digits. For example, a space becomes %20, and & becomes %26. URL decoding reverses this process.
Common Use Cases
Encoding query string parameters in URLs
Safely passing special characters in API calls
Encoding form data for HTTP POST requests
Decoding URL-encoded strings from server logs
Building safe redirect URLs with parameters
Tips & Best Practices
Use encodeURIComponent for query string values (encodes more characters)
Use encodeURI for full URLs (preserves /, :, ?, &, =)
Always encode user input before including in URLs to prevent injection attacks
Frequently Asked Questions
What is URL encoding?▼
URL encoding converts special characters into a format that can be safely transmitted in a URL. Characters like spaces, &, ?, and = are replaced with % followed by their hex ASCII code.
What is the difference between encodeURI and encodeURIComponent?▼
encodeURI encodes a complete URL and preserves characters like /, :, and ?. encodeURIComponent encodes a URL component (like a query value) and encodes those characters too.
Why does a space become %20?▼
The ASCII code for a space is 32, which is 20 in hexadecimal. URL encoding uses hex values prefixed with %.