Convert TXT to EPUB: Free Online Converter
Convert Plain Text to Electronic Publication online for free. Fast, secure document conversion with no watermarks or registration.
TXT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
TXT から EPUB への設定
- エンジン
- ドキュメント
- 設定
- 調整できる設定: 6
- Output Profile
- Margin (px)
- Base Font Size (pt)
- Embed All Fonts
- Smarten Punctuation
- Disable Font Rescaling
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、.txt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.epubファイルをダウンロードしてください。
TXTからEPUBへの変換について
TXT files are the most basic form of digital text: no formatting, no chapters, no metadata, just raw characters. EPUB (Electronic Publication) is the open standard for ebooks, used by Apple Books, Kobo, Google Play Books, and virtually every e-reader except Amazon Kindle. EPUB wraps XHTML content, CSS styles, images, and metadata in a ZIP container, providing reflowable text that adapts to any screen size with bookmarks, annotations, and table of contents navigation.
Converting TXT to EPUB transforms a plain text file (whether it's a novel manuscript, a collection of notes, or any other text content) into a proper ebook that can be read comfortably on e-readers, tablets, and phone reading apps with all the features readers expect.
TXTをEPUBに変換する理由
E-reader devices and apps are specifically designed for long-form reading with features that enhance the experience: adjustable font sizes, night mode, bookmarks, progress tracking, annotations, and synchronized reading position across devices. Opening a TXT file on an e-reader provides a poor experience — no chapters, no table of contents, no metadata, and often incorrect encoding detection.
For authors and self-publishers, converting TXT manuscripts to EPUB is a critical step in the publishing pipeline. EPUB files can be submitted to Apple Books, Kobo, Barnes & Noble, Google Play Books, and other retailers. Even for personal reading, wrapping a TXT file in EPUB format dramatically improves the experience on any reading device or app.
主な活用例
- Convert plain text novel manuscripts into EPUB ebooks for self-publishing on Apple Books and Kobo
- Transform Project Gutenberg text files into EPUB format for comfortable reading on e-readers
- Package text-based course materials as EPUB files for student access on tablets and phones
- Convert personal notes and journal entries from TXT to EPUB for organized reading in ebook apps
- Create EPUB versions of text-based documentation for offline reading on e-reader devices
仕組み
Pandoc processes the TXT file, detecting character encoding and parsing the text structure. Paragraph breaks (double newlines) are identified and converted to XHTML paragraph elements. If Markdown-like heading patterns are detected (lines starting with # or preceded by === or --- underlines), they are mapped to heading elements for table of contents generation. The content is wrapped in valid EPUB 3 structure: mimetype file, META-INF/container.xml, content.opf (metadata and manifest), nav.xhtml (navigation/TOC), and one or more XHTML content files. Basic CSS is included for readable typography on e-reader devices.
品質とパフォーマンス
All text content from the TXT file is preserved verbatim in the EPUB output. The conversion produces clean, reflowable content that adapts to any screen size and font preference. The main limitation is that plain text provides no structural hints — without explicit chapter markers or heading patterns, the EPUB will be a single continuous flow of text. For the best EPUB output, add chapter headings or blank-line separators in the TXT file before converting, or use Markdown formatting for rich structure.
デバイス互換性
| Device | TXT | EPUB |
|---|---|---|
| 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
- 1Use blank lines between paragraphs in your TXT file — they will be recognized as paragraph breaks in the EPUB
- 2Add chapter headings with # prefix (Markdown-style) in the TXT for automatic chapter detection and TOC generation
- 3Save the TXT file as UTF-8 to preserve accented characters, em dashes, and special quotation marks in the EPUB
- 4After conversion, use Calibre to add a cover image, edit metadata, and fine-tune the EPUB for publishing
- 5For long novels, separate chapters with clear heading lines to produce a well-navigated EPUB with chapter jumps
関連する変換
TXT-to-EPUB conversion transforms raw text into a proper ebook format with reflowable text, metadata, and e-reader compatibility — essential for authors, readers, and anyone who wants to read long text content comfortably on dedicated reading devices.
TXTとEPUBの比較
| 特徴 | TXT | EPUB |
|---|---|---|
| 正式名称 | Plain Text | Electronic Publication |
| 拡張子 | .txt | .epub |