MSG は Outlook が保存するメール形式です。本文・添付ファイル・ヘッダーをひとまとめに保持します。
Typical use: 保管した MSG を PDF/EML に変換して検索や共有に使います。
About the MSG format
MSG は Outlook が保存する単一メッセージ形式です。本文、添付、送信者情報、既読状態まで保持します。
Outlook 以外で扱うには EML や PDF への変換が便利です。保管しているデータを検索や共有に回すときに有効です。
Strengths
- ✓ Outlook で完全に再現される
- ✓ 添付も含めて保存
- ✓ メタデータが豊富
Limitations
- ✗ Outlook 以外では開きにくい
- ✗ 構造が独自
- ✗ Complex RTF bodies may simplify to text
- Layout
- As saved in Outlook
- Editability
- Outlook only (natively)
- Structure
- OLE compound document
- Best for
- Archived Outlook correspondence
Convert MSG to…
6 direct directions plus 4 workflows, sorted A–Z; 🔥 marks popular targets.
Cross-engine workflows
Frequently asked questions
What is a MSG file?
MSG is Outlook's saved-email format: an OLE compound file holding headers, the HTML/plain body, recipients and attachments. It only opens properly inside Outlook — everywhere else it is a black box.
How do I convert MSG files online?
Pick a target format from the "Convert MSG to…" list below, drop your file and hit convert. Everything runs in your browser — no install, no upload, no watermark, no limits.
Is it safe to convert MSG files here?
Yes. Every conversion is performed by your own device inside the browser — files never leave for a server, and the page keeps working even offline.
Which formats can MSG convert to?
This page lists all 10 directions across documents, images, audio, video, spreadsheets and archives — each one is its own free converter page.