Convert RTF to DOCX: Free Online Converter
Convert Rich Text Format to Microsoft Word Open XML online for free. Fast, secure document conversion with no watermarks or registration.
RTFに対応
アップロードすることで、これらのファイルの権利を有していること、および利用規約に同意することを確認したものとみなされます。
変換設定: ファイルを追加すると調整できます
安全な転送
HTTPS暗号化アップロード
プライバシー優先
ゲストのファイルは約2時間で自動削除
登録不要
すぐに変換を開始
どこでも動作
あらゆるブラウザ、あらゆるデバイス
RTF から DOCX への設定
- エンジン
- ドキュメント
- 設定
- 調整できる設定: 1
- Page Size
変換方法
アップロードエリアにドラッグするか、クリックして選択し、.rtfファイルをアップロードしてください。
必要に応じて出力設定を調整してください。デフォルト設定ではオリジナルの品質を維持します。
「変換」をクリックし、準備ができたら.docxファイルをダウンロードしてください。
RTFからDOCXへの変換について
RTF is a text-based document format designed for cross-platform interchange in an era before modern standards existed. DOCX is the current Word format: a ZIP archive of well-defined XML files following the Office Open XML standard. Converting RTF to DOCX modernizes a legacy interchange format into the current professional standard, producing a smaller, more capable document file.
The conversion parses RTF's control word syntax and maps it to OOXML's structured XML elements. Paragraph formatting becomes <w:pPr> properties, character formatting becomes <w:rPr> elements, tables become <w:tbl> structures, and images are decoded from hex and stored in word/media/. The result is a modern Word document that works natively in every current word processor.
RTFをDOCXに変換する理由
RTF is showing its age. While still universally readable, RTF lacks features expected in modern documents — content controls, theme-based styling, equation editing, accessibility tagging, and structured document tags. Converting to DOCX brings RTF content into the current era, enabling modern formatting features and integration with cloud platforms like Microsoft 365, Google Docs, and SharePoint.
DOCX is also significantly more efficient than RTF. RTF hex-encodes all binary data (images, embedded objects), roughly doubling the storage requirement for non-text content. DOCX uses ZIP compression, so a 5 MB RTF with images might compress to 1.5 MB as DOCX. For documents with embedded images, the size reduction is substantial.
主な活用例
- Modernize RTF document archives into the current DOCX standard
- Reduce file sizes by converting hex-encoded RTF to compressed DOCX
- Upload RTF content to Google Docs, SharePoint, or Microsoft 365
- Enable modern Word features (themes, content controls) on RTF content
- Prepare RTF files for collaborative editing in cloud-based word processors
仕組み
LibreOffice parses the RTF control word stream, building a document model from font tables, color tables, style definitions, and body content. The model is exported as DOCX: RTF paragraph properties map to OOXML <w:pPr> elements, character formatting becomes <w:rPr>, table structures become <w:tbl>/<w:tr>/<w:tc>, and hex-encoded images from \pict groups are decoded to binary and stored in word/media/ with proper content type relationships. The output is a well-formed OOXML ZIP archive compliant with ISO 29500.
品質とパフォーマンス
The conversion is essentially lossless. RTF's formatting capabilities are a subset of DOCX's, so every RTF feature has a DOCX equivalent. Fonts, paragraph formatting, character styling, tables, images, headers, footers, and list formatting all transfer accurately. The DOCX output may actually be higher quality than the RTF because DOCX supports more precise formatting specification.
デバイス互換性
| Device | RTF | DOCX |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
最良の結果を得るためのヒント
- 1Convert all RTF archives to DOCX as a one-time modernization — there is no reason to maintain RTF for current use
- 2Check that images transferred correctly — RTF hex-encoding occasionally has parsing edge cases
- 3The DOCX will be smaller and faster to process than the equivalent RTF
- 4After conversion, take advantage of DOCX features like themes and styles
- 5For Google Docs upload, DOCX performs better than RTF
関連する変換
RTF to DOCX is a clean format upgrade — every RTF feature maps to a DOCX equivalent, producing a smaller, more capable document. This should be the default conversion for any RTF file intended for current use.
RTFとDOCXの比較
| 特徴 | RTF | DOCX |
|---|---|---|
| 正式名称 | Rich Text Format | Microsoft Word Document |
| 拡張子 | .rtf | .docx |