URL Encoder Decoder

What is an URL Encoder Decoder?

The URL Encoder/Decoder converts plain text or special characters into percent-encoded URL parameters (e.g. space -> %20, & -> %26), or decodes URL-encoded parameters back into readable text.

Why Use This Tool?

  • API Request Building: Safely encode query parameters containing spaces, ampersands, or symbols for HTTP GET requests.
  • Web Development & Debugging: Decode garbled URL parameters from web browser addresses or server log files.
  • Security: Prevent URL parameter corruption and injection syntax errors in web applications.

How to Use

  1. Select Encode or Decode mode.
  2. Paste your URL string or query parameter into the workspace.
  3. Copy the encoded URL parameter or readable text output.

Real Working Example

Input:

https://example.com/search?q=developer tools & web app

Output Result:

https%3A%2F%2Fexample.com%2Fsearch%3Fq%3Ddeveloper%20tools%20%26%20web%20app

Important Technical Details & Features

  • Standard Percent Encoding: Follows RFC 3986 URL encoding specifications.
  • UTF-8 Character Support: Encodes non-ASCII characters and emojis correctly using encodeURIComponent.
  • 100% Client-Side: Processing runs entirely in your browser memory.

Related Web & SEO Tools

  • URL Parser: Parse URLs into protocol, host, path, and params.
  • URL Builder: Build URLs visually with query parameters.
  • Slugify String: Convert text strings to clean URL slugs.

Frequently Asked Questions

Why do spaces turn into %20 in URL encoded parameters?

URLs cannot contain literal space characters, so standard percent-encoding converts spaces to %20.

What is the difference between encodeURI and encodeURIComponent?

encodeURI leaves URL structure characters (/, ?, &) intact; encodeURIComponent encodes all special characters.

Does this tool support non-ASCII and Unicode characters?

Yes, UTF-8 characters and emojis are encoded into percent-escaped bytes accurately.

How do I decode a garbled URL parameter from a server log?

Paste the encoded string into Decode mode to restore readable text.

Is my URL parameter text processed on a server?

No, encoding and decoding execute 100% locally in your browser memory.

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