What conversions are available?

Full-width ↔ half-width and Hiragana ↔ Katakana conversions, switchable by tabs.

Are symbols and numbers also converted?

Yes. Alphanumeric characters and symbols are also converted between full-width and half-width.

No. All processing happens in your browser.

Yes. All content entered in the text area is converted at once. The converted text can be copied directly.

Once the converted text is displayed, click the copy button or select the text directly and copy it.

Perform full-width/half-width and hiragana/katakana conversions with one click.

Full→Half Half→Full

Katakana Alphanumeric Symbols

Input

Output

What conversions are available?: Full-width ↔ half-width and Hiragana ↔ Katakana conversions, switchable by tabs.
Are symbols and numbers also converted?: Yes. Alphanumeric characters and symbols are also converted between full-width and half-width.
Is my data sent to a server?: No. All processing happens in your browser.
Can text be converted in bulk?: Yes. All content entered in the text area is converted at once. The converted text can be copied directly.
How do I copy the converted result?: Once the converted text is displayed, click the copy button or select the text directly and copy it.

Last Updated: 2026-02-21