#419 · Language & Unicode Text Tool

Fullwidth to Halfwidth Converter

Convert fullwidth Latin letters, numbers, punctuation, and spaces into halfwidth equivalents for cleaner web, data, CSV, and code usage.

Text Input

Paste or upload text

Text to process

Processing mode

Custom note

note

Recent History

No history yet.

How to use this text tool

Paste text or upload a TXT/CSV file.
Choose cleanup and analysis options.
Run the tool and review the processed result, quality score, and metrics.
Copy the result or download TXT, CSV, or JSON.

What this tool does

Fullwidth to Halfwidth Converter checks the input for language-specific characters, Unicode issues, formatting risks, and cleanup opportunities.

The tool applies Unicode-aware regular expressions, optional cleanup rules, script counting, width analysis, hidden-character detection, and before/after reporting.

Quality score is based on hidden characters, mixed formatting, script-specific issues, and how much cleanup was required.

Example

Input

ＡＢＣ１２３　Ｈｅｌｌｏ！
価格：１０００円

Output

ABC123 Hello!
価格:1000円

The result card shows how many fullwidth letters, numbers, symbols, and spaces were converted.

Use cases

Clean copied text from PDFs, websites, spreadsheets, and AI tools.
Prepare multilingual text for publishing, SEO, translation, and localization.
Detect hidden Unicode characters before pasting into code or data files.

Tips for better output

Use strict cleanup for data, CSV, JSON, and code-like text.
Use report-only mode when you need to inspect text before changing it.
Export CSV or JSON when documenting cleanup results.

Processing details

Processing runs locally in the browser. The tool does not send your text to a server.

Automatic script detection is based on Unicode ranges and may not identify every language variety or orthographic convention.