URL Encoding and Decoding Explained with Free Online Tool

URLs can only contain certain characters from the ASCII set. When you need to include spaces, special characters, or non-ASCII characters in a URL, they must be percent-encoded. AllToolsHub's free URL Encoder/Decoder handles this conversion instantly and accurately.

What is URL Encoding?

URL encoding (also known as percent encoding) replaces unsafe characters with a percent sign followed by their hexadecimal ASCII value. For example, a space becomes %20, an ampersand becomes %26, and a question mark becomes %3F. This ensures that URLs are transmitted correctly across the internet without being misinterpreted by browsers and servers.

How to Encode or Decode URLs

1. Open URL Encoder — Go to the AllToolsHub URL Encoder/Decoder page.
2. Choose mode — Select Encode to convert text to URL-safe format, or Decode to convert back.
3. Enter your text or URL — Paste the string you want to process.
4. Process — Click encode or decode for instant results.
5. Copy the result — Use the encoded or decoded string in your project.

When You Need URL Encoding

URL encoding is necessary when passing user input as URL parameters, when constructing API request URLs with special characters, when creating links with non-English characters, when encoding file names in download URLs, and when building query strings for search engines. Proper URL encoding prevents broken links and security vulnerabilities.

All Processing Stays Local

URL encoding and decoding happens entirely in your browser. Your URLs, query parameters, and data never leave your device, keeping your API endpoints and URL structures private.