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Overview

Japanese Full/Half-width Converter (Zenkaku/Hankaku)

The definitive tool to convert Japanese text for bank forms. Instantly switch between Zenkaku (Full-width) and Hankaku (Half-width) Katakana, numbers, and symbols.

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#zenkaku-hankaku-converter #half-width-katakana #japanese-bank-form #fullwidth-to-halfwidth #katakana-converter

Japanese Full-width / Half-width Converter

Convert between Zenkaku (full-width) and Hankaku (half-width) characters. Essential for Japanese bank forms and legacy systems.

Input Text

Converted Result

Result will appear here automatically

What you can solve

How to convert Japanese name to half-width Katakana for bank transfer?

Paste your Katakana name into this tool and select 'Full to Half'. It will instantly generate the 1-byte version required by Japanese banking apps and ATMs.

How to fix Zenkaku/Hankaku validation errors on Japanese forms?

Use this converter to normalize your input. If the form asks for 'Hankaku', use our tool to convert your numbers and letters to half-width ASCII equivalents.

How to convert full-width numbers to standard ASCII numbers?

Paste your full-width numbers (０-９) and use the 'Full to Half' mode to get standard numbers (0-9) used in programming and global systems.

What types of characters does this Zenkaku/Hankaku converter handle?

The converter handles full-width Katakana (ア→ｱ), full-width Latin letters (Ａ→A), full-width digits (１→1), full-width punctuation (。→.), and voiced/semi-voiced marks (ガ→ｶﾞ). Hiragana is not converted because there is no half-width Hiragana in standard encodings.

How do I convert full-width spaces and punctuation to standard ASCII equivalents?

Switch to 'Full to Half' mode and paste the text containing full-width spaces (　) or punctuation such as ．、。The tool converts each character individually, so you can clean mixed-width text from spreadsheets, copied PDFs, or CRM exports in one pass.

Typical workflow

Japanese Full/Half-width Converter (Zenkaku/Hankaku)Japanese Bank Account Batch Formatter

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What is

What is Japanese Full/Half-width Converter (Zenkaku/Hankaku)?

Struggling with 'Invalid Character' errors on Japanese bank forms? This tool is designed to solve that. It converts standard Japanese text into the specific 'Hankaku' (Half-width) format required by legacy financial systems and official registrations in Japan.

How to use

How to use Japanese Full/Half-width Converter (Zenkaku/Hankaku)

1. Paste your text (e.g., your name in Katakana or an address). 2. Click 'Full → Half' for bank forms. 3. Copy the normalized result. The tool handles complex Katakana marks (voiced/semi-voiced) automatically.

Example

Scenario: Entering your name for a bank transfer.
Input (Full-width): ヤマダ タロウ
Output (Half-width): ﾔﾏﾀﾞ ﾀﾛｳ

Common use cases

1. Converting names to Half-width Katakana for Japanese bank account transfers.

2. Fixing 'Full-width only' or 'Half-width only' validation errors on Japanese websites.

3. Normalizing address data (numbers and hyphens) for shipping labels.

4. Cleaning up mixed-width characters in database records.

Frequently asked questions

Why does my name get rejected by the bank form?v

Most Japanese banks use legacy Zengin systems that only accept 1-byte (Half-width) Katakana. Standard keyboard input is usually 2-byte (Full-width), which causes the error. This tool fixes that by re-encoding each character.

How do you handle Katakana marks like 'ガ' or 'パ'?v

In Full-width, 'ガ' is one character. In Half-width, it must be split into 'ｶ' and 'ﾞ'. Our tool does this automatically to ensure your data is system-compatible.

Is it safe to paste my name here?v

Yes. AIStacker runs entirely in your browser. No data is sent to any server. Your privacy is guaranteed.