OctalOne

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URL Encoder / Decoder

Encode text for use in URL query strings (Percent-encoding) or decode encoded URLs.

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Understanding URL Encoding

URL encoding (or Percent-encoding) converts characters into a format that can be transmitted over the Internet. Unsafe ASCII characters are replaced with a % followed by two hexadecimal digits.

  • Space becomes %20
  • / (Forward slash) becomes %2F
  • ? (Question mark) becomes %3F

Tips

  • Use Encode when you have a piece of text (like a search query or name) that you want to put inside a URL parameter.
  • Use Decode when you see a messy URL with lots of % signs and want to read the original content.

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Frequently Asked Questions

Yes! Once loaded in your browser, this tool functions completely offline with zero internet access or server communication required.

URLs can only contain a limited set of characters (ASCII). Characters like spaces, question marks, and non-English letters must be encoded (replaced with % followed by hex digits) to be safely transmitted over the internet.

This tool uses 'encodeURIComponent' which encodes all characters with special meaning (like /, ?, &, =). This is safer for encoding individual query parameters. 'encodeURI' leaves characters needed for a full URL (like : and /) alone.

Yes, you can perfectly reverse the process using the Decode feature, unless the original data was malformed.