Full-width Converter

Full-width characters are a set of Unicode code points that represent the same letters and digits as standard ASCII but occupy the width of a CJK (Chinese, Japanese, Korean) character, roughly twice the width of a standard ASCII character in monospaced fonts. They were originally designed for East Asian typography systems where character grids require all characters to have equal width. The full-width Latin alphabet occupies the Unicode block U+FF01 to U+FF60.

On social media platforms and messaging apps, full-width text creates a distinctive aesthetic: ａｅｓｔｈｅｔｉｃ, ｆｕｌｌ ｗｉｄｔｈ, ｈｅｌｌｏ ｗｏｒｌｄ. This style became associated with "vaporwave" aesthetics in internet culture around 2012–2016 and remains popular in profile bios, art projects, and stylised usernames. Unlike bold or italic formatting (which depends on the platform supporting Markdown), full-width characters are stored as literal Unicode code points and render consistently on any platform that supports Unicode, which is essentially every modern operating system and web browser.

The conversion is a simple offset: the full-width capital A (Ａ, U+FF21) is exactly 65,248 positions after the ASCII capital A (A, U+0041) in the Unicode table. The same offset applies to every letter and digit. Spaces are converted to ideographic spaces (U+3000) in full-width mode to maintain consistent character width.

This tool converts in both directions: ASCII to full-width and full-width back to standard ASCII. Conversion is instant and handles mixed-case text correctly.