FormatAndFix

URL Decoder

All data is processed on your device and never uploaded.

What is the URL Decoder?

A URL decoder is a developer utility built to translate percent-encoded web strings back into their original characters. Because internet protocols require uniform resource locators to only contain a small subset of safe ASCII characters, web browsers automatically convert spaces, symbols, and foreign alphabets into a format like "%20" or "%3D".

This translation utility reverses that exact process using standard JavaScript decoding functions. It takes an unreadable string packed with percentage signs and hexadecimal digits and parses it back into clean UTF-8 text. This makes it possible to read raw webhook payloads, inspect deeply nested query parameters, or review digital marketing tags without manual translation.

Why use our free URL Decoder?

When you need to unencode web addresses or inspect raw data strings, this converter provides a seamless and private experience. Here is how it helps your workflow:

  • Local Processing: Your sensitive API tokens and internal query strings are translated entirely in your browser memory and never uploaded to a server.
  • Form Data Handling: Legacy form submissions often encode spaces as a plus symbol instead of standard percentages. A built-in setting allows you to instantly parse these specific application formats correctly.
  • Security Inspection: Cybersecurity analysts can safely reveal obfuscated cross-site scripting (XSS) payloads or malicious redirects hidden behind layers of percent encoding.

How to use the URL Decoder

Reversing a garbled link into human-readable text takes just a few clicks:

  1. 1 Input Data: Paste your percent-encoded text into the "URL Encoded String" text box.
  2. 2 Configure Settings: If you are parsing form data where spaces appear as plus signs, enable the "Decode Plus (+) as Space" toggle in the right sidebar.
  3. 3 View Results: The tool automatically parses the input and displays the readable characters in the "Decoded Text" area.
  4. 4 Copy or Clear: Use the "Copy" button to save the output to your clipboard, or click the "Clear All" icon to start over.

Frequently Asked Questions

It replaces unsafe characters with a percent sign followed by their two-digit hexadecimal equivalent. For example, a space becomes "%20" and an at symbol becomes "%40", ensuring the address routes correctly across the internet.

Historically, HTML forms submitted via GET requests convert spaces into plus symbols rather than the standard hex code. Our interface includes a dedicated toggle to handle these specific application payloads accurately.

Yes, digital marketers frequently paste entire tracking links into the input box to verify campaign names and sources. The script instantly converts any garbled tracking codes back into plain english.

Absolutely. Because the conversion logic runs completely client-side via JavaScript, your web addresses and internal query strings never leave your device.

If a web address has been processed twice (turning a space into "%2520"), you will need to copy the first output and paste it back into the input box to run the translation a second time.