Circled numbers
Input
持ち物: ①申請書 ②本人確認書類
Output
持ち物: (1)申請書 (2)本人確認書類
Environment-dependent / Machine-dependent Character Checker
Check common Japanese machine-dependent characters before email, forms, or submission.
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How to use and features
Check Japanese text for characters that can break older forms, email systems, or submission workflows, then review suggested safer replacements.
What it helps with
- Check text before sending Japanese email campaigns
- Review text before pasting into Japanese forms
- Find characters that may cause mojibake before document submission
- Review common characters such as ①, ②, ㈱, ㈲, 髙, 﨑, Ⅰ, Ⅱ, ㍉, and ㌔
How to use
- Paste Japanese text before email delivery, form submission, document submission, or publishing.
- Review common characters such as ①, ②, ㈱, ㈲, 髙, 﨑, Ⅰ, Ⅱ, ㍉, and ㌔.
- Review detected positions, character types, and replacement suggestions. Suggestions still need context.
- Copy the suggested replacement text or apply it to the input.
Examples
Company symbol
Input
㈱高橋商事
Output
(株)高橋商事
Variant kanji
Input
髙橋さんと﨑山さん
Output
髙橋さんと﨑山さん
Good to know
- Detects a practical set of common characters, not every Unicode compatibility character.
- Replacement suggestions are context-dependent and should be reviewed.
- This tool does not guarantee that a target system will accept the text.
FAQ
Does this detect every risky Unicode character?
No. It focuses on a practical set of common Japanese compatibility and environment-dependent characters.
Are replacements always correct?
No. Variant kanji are preserved by default. Include them in replacements only after checking the required spelling of names, company names, and official documents.
Does this upload text?
No. Character checking runs in your browser and input is not sent to a server.