FilenameFixer - 文字化けファイル名を自動修正

ファイルのアップロードや添付時に、壊れたファイル名（NFD→NFC）を自動的に修正します。Gmail、Google Drive、Outlookなどすべてのウェブサイトで動作します。

FilenameFixer automatically fixes broken Unicode filenames when you upload or attach files on any website. 🔧 THE PROBLEM When you create files on a Mac, the filenames are stored in Unicode NFD (decomposed form). When these files are opened on Windows, the filenames appear corrupted — Korean characters break into individual Jamo (한글 → ㅎㅏㄴㄱㅡㄹ), French accents separate (résumé → résumé), German umlauts split, and Vietnamese diacritics scatter. ✅ THE SOLUTION FilenameFixer intercepts file uploads and automatically converts filenames from NFD to NFC (composed form) before they're sent. No more broken filenames when sharing files between Mac and Windows. 🌟 KEY FEATURES • Automatic conversion — Works silently in the background • Works everywhere — Gmail, Google Drive, Outlook, Slack, Dropbox, and any website with file uploads • Drag & drop support — Fixes filenames on drag-and-drop file uploads • Copy & paste support — Fixes filenames on paste events • All languages — Korean, French, German, Vietnamese, Spanish, Japanese, and any language with accented characters • Toast notifications — See what was fixed in real-time • Conversion history — Track all filename conversions with 7-day chart • Per-site control — Disable on specific websites • Export/Import — Backup and restore your settings • 100% private — All processing happens locally in your browser. No files are sent to any server. No data is collected. ⚙️ HOW IT WORKS 1. Install the extension 2. Upload or attach a file on any website 3. FilenameFixer automatically detects NFD-encoded filenames 4. The filename is converted to NFC before upload 5. A toast notification shows what was fixed 🔒 PRIVACY Your files never leave your browser. FilenameFixer processes everything locally using JavaScript. No servers, no data collection, no tracking. The extension only requires "storage" permission to save your settings and "activeTab" to detect the current site. 🌍 SUPPORTED LANGUAGES Korean (한글), French (français), German (Deutsch), Vietnamese (Tiếng Việt), Spanish (español), Japanese (日本語), and any language using Unicode accented characters. 🆓 FREE Completely free with no limitations. No premium features, no subscriptions.