How to use this text tool
- Paste or type the text you want to process.
- Choose any options that apply to your target format.
- Select Compare Width Forms or press Ctrl/Cmd + Enter.
- Review the report, then copy or download the result.
Fullwidth Halfwidth Comparator
Compare text at the code-point level to find width variants that look alike but do not match in databases or validation rules. Each affected character is listed with its position, code point, width class, and normalized equivalent.
Text Input
Mixed-width textAd space
What this tool does
Fullwidth Halfwidth Comparator turns hard-to-see text details into a readable result you can check before editing production content.
The comparator classifies Unicode Halfwidth and Fullwidth Forms and checks whether NFKC normalization changes each grapheme.
Visual similarity is font-dependent; the report focuses on Unicode width compatibility, not every homoglyph.
Example
Load the sample to see a representative input. The result identifies or converts the relevant Unicode and locale details while leaving unrelated text in place.
Use cases
- Checking localized UI copy before release
- Cleaning data imported from documents or spreadsheets
- Investigating text that compares or renders unexpectedly
- Preparing reproducible notes for developers and translators
Tips for better output
- Keep a copy of the original text.
- Test the exact locale or target platform you plan to support.
- Inspect warnings instead of applying bulk replacements blindly.
- Use the downloadable report when sharing a finding.
- Retest after changing normalization or formatting rules.
Processing details
Processing happens locally with built-in JavaScript Unicode and internationalization features. The report is generated from the text and options currently visible on the page.
Visual similarity is font-dependent; the report focuses on Unicode width compatibility, not every homoglyph.
Frequently asked questions
Does the Fullwidth Halfwidth Comparator send my text to a server?
No. The processing runs in your browser, so the pasted text is not uploaded by this page.
Can I use the result in a spreadsheet or localization file?
Yes. Copy the text output, download the report, or use the CSV and JSON exports when they appear.
Why can the result differ between browsers?
Unicode and locale data are updated over time. Browsers, fonts, and operating systems may support different versions.
Will this tool change my original text automatically?
No. Your input remains in the input box. Review the generated result before replacing source data.
What should I do with an invalid or suspicious result?
Check the reported code points or fields against the rules of the system that will consume the text.
Related text tools
Report fields
| Field | Meaning |
|---|---|
| Output | The processed text or inspection report |
| Summary | A count of the main findings |
| Details | Unicode or locale-specific evidence |
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