sentinel-markdown 1.9.4

sentinel-markdown — a fast, private Markdown reader that stays locked to the folder you open. No network in the render path, no telemetry, no scripts.

What's new since 1.8.1

Edit any block without leaving the reader (1.9)

• Hover a paragraph, heading, list, table, or fenced block for a quiet edit control — or double-click, or press Ctrl+E — and edit exactly that block's Markdown source in place. A copy tool on the same hover cluster copies the block's exact source.
• Live preview while you edit — Mermaid diagrams, charts, display math, and JSON/YAML/TOML blocks re-render below the editor shortly after you pause typing. An invalid draft keeps the last good render on screen, never a blank pane.
• Safe saves — an edit never overwrites a change made outside the app (saves are conflict-checked against the file on disk), and if the open file changes externally, the document updates around your open editor instead of discarding your work.
• Document-wide undo/redo of committed edits from the toolbar (Ctrl+Z / Ctrl+Y), in addition to the editor's own undo history.

Hardened rendering (1.9.4)

• Chart graphics are re-sanitized in place after every draw, and the editor authenticates its own source-position markers — a crafted document cannot forge edit controls or skew scroll position.

Downloads — which one?

Package	Scope	Admin?	Preview Pane	Pick it when
Sentinel-Markdown_1.9.4_x64_en-US.msi	per-machine (Program Files)	yes	yes	you want the Explorer preview, the Open-with entries, or a managed install
Sentinel-Markdown_1.9.4_x64-setup.exe	just for you	no	no	you cannot elevate

Install one, never both. Both are signed by Integrated Analytic Solutions, LLC and register the .md association; the machine-wide Open-with entries for data types come with the MSI. If you still have a setup exe older than 1.7.6 installed, update via the MSI or the Store rather than running its uninstaller.

Tip after updating via the MSI: if the Explorer preview pane looks stale, restart Windows Explorer once (Task Manager → Windows Explorer → Restart).

Also on the Microsoft Store (automatic updates).

sentinel-markdown 1.8.1

sentinel-markdown — a fast, private Markdown reader that stays locked to the folder you open. No network in the render path, no telemetry, no scripts.

What's new since 1.3.3

Reads data at any size (1.4–1.6)

• JSONL/NDJSON per-record view, plus .geojson / .har / .webmanifest / .ipynb and Cargo.lock / poetry.lock recognition.
• Multi-gigabyte logs and datasets open in seconds and scroll smoothly, streamed from disk rather than loaded whole.
• Print / Save as PDF joins the self-contained HTML export.

A window of its own (1.7)

• Theme-matched custom title bar; every document control lives with the document; the side panels run full height.
• File menu reorganized with submenus; dark-mode menus fixed; dialogs fit at every UI scale.

Trustworthy at the edges (1.8 – 1.8.1)

• Per-type file icons in the folder navigator and Recent files.
• Charts paint at full size in narrow windows — fixed-size charts scroll, column-filling charts fit exactly.
• Dense data files decide their syntax colouring up front — no colour flash-then-drop on big files.
• The app stands in Windows' "Open with" list for every format it reads, with its own name and icon — your existing defaults are never touched (MSI installs).
• Explorer Preview Pane registration is carried reliably by the MSI and verified inside the installer before release.
• Uninstalling an old per-user copy can no longer break a machine-wide install.

Downloads — which one?

Package	Scope	Admin?	Preview Pane	Pick it when
Sentinel-Markdown_1.8.1_x64_en-US.msi	per-machine (Program Files)	yes	yes	you want the Explorer preview, the Open-with entries, or a managed install
Sentinel-Markdown_1.8.1_x64-setup.exe	just for you	no	no	you cannot elevate

Install one, never both. Both are signed by Integrated Analytic Solutions, LLC and register the .md association; the machine-wide Open-with entries for data types come with the MSI. If you still have a setup exe older than 1.7.6 installed, update via the MSI or the Store rather than running its uninstaller.

Also on the Microsoft Store (automatic updates).

sentinel-markdown 1.3.3

First public release of sentinel-markdown — a fast, private Markdown reader that stays locked to the folder you open. No network in the render path, no telemetry, no scripts.

What's new in 1.3.3

• Windows Explorer Preview Pane now works end-to-end. Select a .md file in Explorer with the Preview Pane open and it renders in place. Fresh installs of either installer register everything correctly.

Recent highlights (1.3 line)

• Data viewer — json / yaml / toml / txt files and data-shaped code fences render with a Pretty ⟷ Raw toggle. All parsing is offline and non-executing.
• Folder-wide search (Ctrl+Shift+F) optionally covers data files.
• Source ↔ render split view with accurate synced scrolling.
• Dropping a file that's already inside the open folder opens it in place.

Downloads

Package	Notes
Sentinel-Markdown_1.3.3_x64_en-US.msi	MSI installer (per-machine; good for managed installs)
Sentinel-Markdown_1.3.3_x64-setup.exe	NSIS setup exe

Both are signed by Integrated Analytic Solutions, LLC and register the .md file association and the Explorer Preview Pane. Also available from the Microsoft Store (automatic updates) and as direct downloads at iasols.io.