Notepad for macOS

Also on the Mac App Store as Notepad Classic

Private plain-text notepad for Mac.
No AI. No account. No cloud. Multi-tab editing with session restore (including unsaved notes), local spell check, optional Markdown/HTML preview, and solid encodings (UTF-8, EUC-KR, UTF-16).

Built natively with Swift + SwiftUI for Apple Silicon.

Mac App Store	Notepad Classic (free)
Direct download	v1.2.3 DMG (Developer ID · notarized)
Website	GitHub Pages
Release notes	v1.2.3 · v1.2.2 · v1.2.1 · v1.2 · v1.1

Developer: Min-Gul Kim, MD, PhD (Jeonbuk National University Medical School)

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Why this instead of TextEdit?

	TextEdit	Notepad Classic
Multi-tab	Limited / awkward	First-class tabs, drag reorder
Unsaved session restore	No	Yes (including reboot)
Encodings (EUC-KR, etc.)	Basic	Open / reopen / convert + warnings
Spell check	System	On by default; per-extension off for code
AI / account / network	—	None by default. Network only if you allow remote images/CSS in a preview tab

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Features

• Private by design — sandbox, no ads, no tracking; network only if you allow remote images in a Markdown preview
• Session restore — unsaved tabs come back; or start fresh from Settings
• Tabs — drag reorder, Ctrl-Tab, * on dirty documents
• Spell check — local system dictionary; optional autocorrect; disable for .log / .json / .swift…
• Encodings — UTF-8, UTF-8 BOM, EUC-KR, UTF-16 LE/BE
• Syntax highlight — Markdown, JSON, XML, HTML, and logs; .txt stays plain
• Preview — optional side/full preview for .md and .html; remote images/CSS per-tab; open in default browser
• Find & replace, go to line, date/time (F5), print, page setup
• English & Korean UI

Intentional non-goals

• AI rewrite / summarize / chat
• WYSIWYG / Typora-style inline editing, math, Mermaid
• Accounts, cloud sync, telemetry

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v1.2 highlights

Preview	Optional side/full preview for .md and .html
Highlight	Markdown, JSON, XML, HTML, logs
Safety	No script execution; remote assets per-tab allow
Browser	Open the current file in the default browser
Toggle	Tab-bar preview icon stays visible while the pane is open

Details: RELEASE_NOTES_v1.2.md

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한국어 요약

Notepad for macOS는 Windows 11 기본 메모장에 익숙한 사용자를 위해 만든 플레인 텍스트 전용 편집기입니다.
AI·계정·클라우드 없이, 탭 + 미저장 세션 복원, 맞춤법 검사, EUC-KR 등 인코딩, Markdown/JSON/XML/HTML 하이라이트, 선택적 .md/.html 미리보기를 지원합니다.

Mac App Store 이름: Notepad Classic · 받기

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Store & marketing materials

• English App Store fields: store/listing-en.md
• Korean App Store fields: store/listing-ko.md
• Screenshot captions (6 frames): store/screenshot-copy.md
• Submission checklist: store/submission-checklist.md

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Development

• Swift 5 / SwiftUI + AppKit (NSTextView)
• Apple Silicon (arm64) · Xcode 26+

./build.sh          # Debug
./build.sh release  # Release
./build.sh test     # Unit tests
./build.sh dist     # Developer ID DMG (set DEVID_APP / NOTARY_PROFILE)
./build.sh open     # Xcode

notepad_macOS/
├── README.md  index.html  build.sh
├── docs/releases/
├── store/                 # listings, screenshots, privacy
└── NotepadForMacOS/       # Xcode project (file-system sync groups)

Shortcuts (selection)

Action	Shortcut
New tab	Cmd+T
Save	Cmd+S
Find	Cmd+F
Go to line	Cmd+L
Preview / hide	Cmd+Option+P
Full-screen preview	Cmd+Option+Return
Word wrap	Cmd+Shift+W
Next / previous tab	Ctrl+Tab / Ctrl+Shift+Tab

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License

MIT License · Copyright © 2026 Min-Gul Kim.