Fullwidth/半角 Converter Tool

Introduction

The Fullwidth/Halfwidth Converter tool is a simple and easy-to-use online text processing tool that helps you convert between fullwidth and halfwidth characters. Fullwidth characters are square characters used in Chinese, Japanese, and other writing systems, occupying two bytes; halfwidth characters are characters used in Western fonts like English letters and numbers, occupying one byte. No login required, runs completely locally, and your data is never uploaded to any server.

Main Features

1. Fullwidth to Halfwidth

Convert fullwidth characters to halfwidth, for example converting "ＡＢＣ１２３" to "ABC123".

2. Halfwidth to Fullwidth

Convert halfwidth characters to fullwidth, for example converting "ABC123" to "ＡＢＣ１２３".

How to Use

1. Enter or paste the text you want to convert in the left input box
2. Click the corresponding conversion button:
   • "Fullwidth to Halfwidth": Convert fullwidth characters to halfwidth
   • "Halfwidth to Fullwidth": Convert halfwidth characters to fullwidth
3. The conversion result will be immediately displayed in the right output box
4. Click the "Copy Result" button to copy the result to clipboard
5. Click the "Clear" button to empty both input and output boxes

Examples

Fullwidth to Halfwidth Example:

Input:

ＡＢＣ１２３　ＤＥＦ４５６

Output:

ABC123 DEF456

Halfwidth to Fullwidth Example:

Input:

ABC123 DEF456

Output:

ＡＢＣ１２３　ＤＥＦ４５６

Mixed Content Example:

Input:

 Hello123 世界！

Fullwidth to Halfwidth output:

Hello123 !

Halfwidth to Fullwidth output:

 Ｈｅｌｌｏ１２３　世界！

Features

• Completely free, no registration required
• Processed in local browser, data is secure
• Supports Chinese and English mixed conversion
• Real-time preview of conversion effects
• Supports copying results to clipboard