PPTX vs TXT
PowerPoint Presentation と Plain Text を徹底比較 — ファイルサイズ、品質、互換性、そして用途に応じた最適なフォーマットの選び方を解説します。
PowerPoint Presentation
PresentationsPPTX is the modern Microsoft PowerPoint format based on Open XML. It is the standard for business and educational presentations, supporting slides, animations, transitions, and embedded media.
PPTX ファイルについてPlain Text
Documents & TextTXT files contain unformatted plain text with no styling, images, or layout information. They are universally readable by any device and operating system, making them the simplest document format.
TXT ファイルについて長所の比較
PPTX 長所
- ~75% smaller than the legacy binary .ppt thanks to ZIP compression.
- Human-readable XML inside — easy to script, patch, or diff.
- Cross-compatible with Keynote, Google Slides, LibreOffice Impress (with minor drift).
- Preserves master slides, themes, animations, notes, and embedded media.
- ISO/IEC 29500 standardized — vendor-independent on paper.
TXT 長所
- Universally readable — every operating system, every editor, every programming language.
- Zero metadata overhead: the file size equals the character count (for ASCII).
- Safe to diff, grep, version-control, and pipe through command-line tools.
- Immune to format obsolescence: a text file from 1970 still opens today.
- Tiny footprint for structured data like logs or configuration.
制限・弱点
PPTX 制限・弱点
- Animations and transitions often render differently outside Microsoft PowerPoint.
- Embedded fonts and media balloon file sizes rapidly.
- Complex layouts drift subtly when round-tripped through non-Microsoft editors.
- Older .pptm macro-enabled variants are a malware vector via VBA.
TXT 制限・弱点
- No styling, images, or embedded structure — just characters.
- Character encoding ambiguity (ISO-8859-1 vs UTF-8 vs Windows-1252) causes "mojibake".
- Line-ending differences between OSes still cause subtle bugs today.
- No way to carry hyperlinks, tables, or formatting without a convention on top (like Markdown).
技術仕様
| 仕様項目 | PPTX | TXT |
|---|---|---|
| MIME type | application/vnd.openxmlformats-officedocument.presentationml.presentation | text/plain |
| Container | ZIP (Office Open XML) | — |
| Standard | ISO/IEC 29500, ECMA-376 | — |
| Released in | Microsoft Office 2007 | — |
| Legacy predecessor | .ppt (binary OLE, 1987-2007) | — |
| Common encodings | — | UTF-8, UTF-16, ASCII, ISO-8859-1, Windows-1252 |
| Line endings | — | LF (Unix), CRLF (Windows), CR (classic Mac) |
| Max file size | — | Limited only by filesystem (no format-level limit) |
| Structure | — | None — flat sequence of characters |
一般的なファイルサイズ
PPTX
- Simple 10-slide deck (text only) 50-200 KB
- Typical corporate deck with images (30 slides) 2-20 MB
- Deck with embedded 4K videos 100-500 MB
TXT
- Short note < 1 KB
- README file 2–20 KB
- Full novel (~90,000 words) 500 KB – 1 MB
- Server log file (daily) 10 MB – 1 GB
Sensitive Documents, Scanned OCR, or 500+ Pages?
For legally sensitive archives that must never leave your local network, or multi-hundred page scanned PDFs needing optical character recognition, local document workstations ensure full compliance.
1回限りの支払いで24時間、最大1GBのファイルおよび最大50ファイルの一括変換が利用可能です。
大容量の動画、PDF、ロスレス音声を広告なし・優先キューでブラウザから直接変換。
最大1,024 MBの高速クラウド処理、24時間暗号化保持、優先サポート。
Offline conversion for multi-hundred page contracts, spreadsheets, and local optical extraction.
High-accuracy legal OCR, certified PDF/A archiving, and compliant document redaction.
よくある 質問
PPTX is the default presentation format for Microsoft PowerPoint since 2007, based on Office Open XML. It stores slides with text, images, animations, transitions, speaker notes, and embedded media in a compressed XML package.
PPTX is the default presentation formato para Microsoft PowerPoint since 2007, based on Office abrir XML. It stores slides com text, images, animations, transitions, speaker notes, e embedded media em um comprimido XML package.
PPTX files open in Microsoft PowerPoint, Google Slides (free), LibreOffice Impress (free), Apple Keynote, and PowerPoint Online. You can also view them via OneDrive or Google Drive in any browser.
PPTX arquivos abrir in Microsoft PowerPoint, Google Slides (free), LibreOffice Impress (free), Apple Keynote, e PowerPoint Online. You can also view them via OneDrive ou Google Drive in any browser.
Use PPTX when you need to edit slides, add animations, or present with speaker notes. Export to PDF when sharing a finalized presentation for viewing or printing where consistent layout is more important than editability.
Use PPTX when Você precisa editar slides, add animations, ou present com speaker notes. Export to PDF when compartilhando a finalized presentation para viewing ou printing where consistent layout is more important than editability.