Question 1

What are full-width and half-width characters?

Accepted Answer

Full-width characters (zenkaku) occupy two display columns and are used in East Asian typography. Half-width characters (hankaku) occupy one column. This distinction is important in Japanese computing where both character widths are used for different purposes.

Question 2

When should I use full-width conversion?

Accepted Answer

Use full-width for Japanese text formatting, official documents, or when matching the aesthetic of Japanese typography. Full-width alphanumeric characters align better with Japanese characters and are often required in Japanese forms and databases.

Question 3

When should I use half-width conversion?

Accepted Answer

Use half-width for URLs, email addresses, code, mathematical expressions, or international data exchange. ASCII systems and most programming languages expect half-width characters. Converting to half-width ensures compatibility with systems that don't support full-width encoding.

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