URL Encoder & Decoder

This tool helps you encode URLs to ensure they're safely transmitted over the internet, and decode URL-encoded text back to its original form.

Standard: encodeURI/decodeURI (preserves valid URL characters)
Component: encodeURIComponent/decodeURIComponent (encodes all special characters)
What is URL Encoding?

URL encoding converts characters that are not allowed in a URL into character-entity equivalents. For example, spaces are converted to %20, question marks to %3F, and so on.

URL encoding is used for:

  • Ensuring URLs are properly formatted for transmission over the Internet
  • Encoding form data when sending it to a server
  • Handling special characters in URLs and query parameters
  • Preventing injection attacks by properly encoding user input

About URL Encoder/Decoder

URL Encoder/Decoder is a useful tool that helps you encode or decode URLs to make them safe for transmission.

Percent-encode text for use inside a URL component and decode percent-escaped data back to readable characters.

Key features

  • Conversion purpose Percent-encode text for use inside a URL component and decode percent-escaped data back to readable characters.
  • Accepted input Paste a query value, path segment, parameter, or already encoded string rather than assuming every full URL needs the same treatment.
  • Conversion controls Choose encode or decode; review whether spaces, reserved separators, and Unicode characters must remain meaningful to the destination.
  • Converted result The output uses percent escapes such as %20 for transport, or restores those sequences during decoding.

How to use URL Encoder/Decoder

Follow this workflow to work with URL components safely and accurately.

  1. Provide the source value Paste a query value, path segment, parameter, or already encoded string rather than assuming every full URL needs the same treatment.
  2. Set the conversion direction Choose encode or decode; review whether spaces, reserved separators, and Unicode characters must remain meaningful to the destination.
  3. Convert the data Start the conversion and watch for validation errors that show the supplied URL components cannot be interpreted in the selected direction.
  4. Validate the result The output uses percent escapes such as %20 for transport, or restores those sequences during decoding.

Usage tips

  • Encode parameter values separately instead of encoding an entire URL with its : / ? & = separators.
  • Avoid repeated encoding, which turns %20 into %2520.
  • Do not treat decoding as validation; inspect redirect targets and user-supplied links separately.

Frequently asked questions

Percent-encode text for use inside a URL component and decode percent-escaped data back to readable characters.
Paste a query value, path segment, parameter, or already encoded string rather than assuming every full URL needs the same treatment.
Choose encode or decode; review whether spaces, reserved separators, and Unicode characters must remain meaningful to the destination.
decodeURIComponent-style decoding rejects malformed percent sequences and does not convert application/x-www-form-urlencoded plus signs unless handled separately.