URL Encoder & Decoder – Free Online URL Conversion Tool

About URL Encoder & Decoder

The URL Encoder & Decoder tool allows you to convert text into URL-encoded format and decode URL-encoded strings back into readable text. It provides two encoding types, a clean interface, real-time character counting, and safe result handling.

This tool supports both encoding and decoding operations and allows users to switch between modes instantly.

What Is URL Encoding?

URL encoding is a process that converts characters into a format that can be safely transmitted in a URL. Certain characters such as spaces or special symbols need to be encoded so they can be properly interpreted by web systems.

In encoded format:

• Spaces may appear as %20

• In query strings, spaces may appear as +

This tool supports both encoding styles.

What Is This URL Encoder & Decoder Tool?

This tool provides two main functions:

• Encode text into URL format

• Decode URL-encoded text back into normal format

Users can switch between Encoder and Decoder modes using tabs. The interface updates dynamically depending on the selected mode.

Why Use This Tool?

This tool helps when you need to:

• Convert text into a URL-safe format

• Encode query parameters

• Decode encoded URLs

• Convert encoded strings back into readable text

• Handle spaces and special characters properly in URLs

The tool processes the text and returns the converted result instantly.

Key Features of This Tool

The following features are implemented directly in your code:

Encode and Decode Modes

The tool supports two modes:

• Encoder Mode

• Decoder Mode

Switching modes:

• Updates the active tab

• Changes input label text

• Changes placeholder text

• Updates mode indicator

• Clears previous results automatically

Two Encoding Types (Encode Mode Only)

When encoding, users can choose between:

➤ Path Encoding (%20)

• Uses standard encoding method.

• Spaces are encoded as %20.

➤ Query Encoding (+)

• Uses query-style encoding.

• Spaces are encoded as +.

Encoding tabs are visible only when Encode mode is active.

Automatic Decode Handling

When decoding:

• The tool first attempts standard decoding.

• If the input contains + and spaces were not properly restored, it automatically switches to query-style decoding.

• This allows decoding of both %20 and + formats without manually selecting encoding type.

Real-Time Character Counters

The tool includes:

• Input character counter

• Output character counter

Both update automatically as text changes or results are generated.

Copy Result Button

After successful conversion:

• A "Copy Result" button appears.

• Uses modern clipboard API.

• Includes fallback method for older browsers.

• Shows temporary success feedback (“Copied!”).

• Button automatically resets after 2 seconds.

Clear All Function

The Clear button:

• Clears input text

• Clears output result

• Resets character counters

• Hides the copy button

Loading State Indicator

During conversion:

• Convert button shows spinner animation.

• Button is temporarily disabled.

• Prevents multiple requests while processing.

Error Handling & Validation

The tool includes multiple validation layers:

Frontend Validation

• If input is empty → shows toast notification.

Backend Validation

• If no text provided → returns error.

• If invalid action → returns error.

• If decoding fails → returns “Invalid URL encoded string”.

Network Error Handling

• Displays toast notification if request fails.

Errors are displayed using temporary toast notifications.

Encoding Types Explained

Path Encoding (%20)

• Uses standard encoding method.

• Spaces become %20.

• Suitable for general URL encoding.

Query Encoding (+)

• Spaces become +.

• Suitable for encoding query parameters.

Users can switch between these encoding types in Encode mode.

How This Tool Works

The conversion process follows these steps:

Step 1: Select Mode

Choose Encoder or Decoder tab.

Step 2: Enter Text

Enter text into the input panel.

Step 3: Select Encoding Type (Encode Mode Only)

Choose between Path Encoding or Query Encoding.

Step 4: Click Convert

The tool sends a POST request to the backend.

Step 5: Process Conversion

Backend processes text using:

• quote() for path encoding

• quote_plus() for query encoding

• unquote() / unquote_plus() for decoding

Step 6: Display Result

The result is safely displayed in the output panel.

User Interface Overview

The tool layout includes:

• Input section

• Output section

• Mode tabs (Encoder / Decoder)

• Encoding type tabs

• Encoding information box

• Convert button

• Clear button

• Copy result button

• Character counters

The layout is responsive and adapts to smaller screens.

Data Handling & Safety

• The result is displayed using textContent, preventing HTML injection.

• The tool does not modify the original input.

• Output is generated from backend processing.

• Download endpoint allows saving result as a text file (when used).

Who Can Use This Tool?

This tool is suitable for:

• Web developers

• Backend developers

• API testers

• QA engineers

• Students learning URL encoding

• Anyone working with encoded URLs

The URL Encoder & Decoder tool provides a simple and efficient way to convert text into URL-encoded format and decode encoded URLs back into readable text. With support for Path Encoding (%20), Query Encoding (+), automatic decoding detection, real-time character counting, copy functionality, and error handling, the tool ensures accurate and user-friendly URL conversion.