james.maesandClaude Fable 5.2
b095d1a183
Element nesting is bounded before any library walks the parsed tree: a count kept while tokens arrive stops runaway input early, and an exact measurement of the parsed tree applies the limit of 256 levels. The renderer parses once with the sanitizer's own settings and sanitizes that tree, so the bound is enforced between the parse and the sanitizer's passes. Deeper markup is an ArgumentException, which the reader already reports as an unsupported document. An unterminated script or comment can report a text run past the end of its block, and malformed markup can report one that starts inside another; both are handled instead of failing the open. Raw-text formatting is applied in one forward pass, and repeated heading titles continue from the last anchor suffix used, so neither grows with the square of the document. DocumentOutline accepts a cancellation token that is honoured between its phases. The threat model states that nesting is bounded and parse time is not. Closes #50 Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com> Signed-off-by: James Maes <james@kof22.com>
MarkdownViewr for Windows
Read Markdown comfortably, keep up with changes, and turn your notes into something worth sharing.
MarkdownViewr is a dedicated Windows reader for project documentation, notes, and README files. Open a document, choose a look you like, and focus on the words.
Download Windows installer · User guide · Ask a question
Make Markdown easier to read
- Make it your own. Choose from 20 document palettes, customize typography, and use a light, dark, or system app appearance.
- Follow changes as they happen. Saved edits refresh automatically. The footer shows the loaded file's modification time and flags an unsuccessful reload.
- Navigate long documents. Show Contents, jump between headings, collapse sections, and find text.
- See how it is written. Open the highlighted, read-only source alongside the document. The split starts at 50/50 and resizes by dragging.
- Share a finished document. Print from the toolbar or save a PDF with separate print styling and optional actions to open the result or its folder.
- Stay in your workflow. Open several documents, launch your configured editor, or open the current document's folder in Explorer.
Contents and Source start hidden. Turn them on when needed, or change their new-window defaults in File → Settings → General.
Download and install
Windows packages support Windows 10 version 1809 or later and Windows 11, x64. Microsoft Edge WebView2 Runtime is required. No .NET SDK is needed to use a release.
| Edition | Choose it for | Package |
|---|---|---|
| Stable | Everyday reading | Download EXE installer · MSI installer |
| Development preview | Trying upcoming changes | Download dev EXE installer · MSI installer |
| Portable | Running without installation | Download portable ZIP |
Download a package from Releases. Run Setup for a per-user installation without administrator rights, or extract the portable ZIP before launching the app.
Installed and portable editions check for updates through Help → Check for updates. Stable and development editions keep separate settings and update channels, so they can coexist.
Quick start
- Choose File → Open or press Ctrl+O and select your Markdown file.
- Use Theme to choose a document palette, Contents to navigate, and Source to inspect the Markdown.
- Save changes in your editor; the viewer refreshes automatically.
- Choose Print in the toolbar to print or create a PDF.
To open Markdown files in the viewer by default, use an installed copy and choose File → Settings → General → Choose default file types. Select MarkdownViewr in Windows Default Apps for your preferred extensions. Windows asks you to make that choice; installation preserves existing defaults.
See the user guide for settings, shortcuts, printing, and troubleshooting.
Help and feedback
Use Help → Community support for questions and Help → Submit an issue for bugs or feature requests. You can also visit Discussions or Issues directly.
For a bug report, include the version from Help → About, your Windows version, and steps to reproduce. Remove private information from logs and screenshots. Report security vulnerabilities privately using SECURITY.md.
Developers and contributors
Want to help? Start with CONTRIBUTING.md. Build commands, tests, architecture, and release verification are in DEVELOPERS.md.
This is a Product-tier project adopting the KofTwentyTwo standards, built with AppKit and WinUI 3. OpenSSF enrollment is active; registration does not mean a passing badge has been earned.
Credits and license
Based on Darin Kelkhoff's original macOS markdownViewr. Visit Darin's website. The Windows app also credits the open-source libraries it uses in Help → About → Components.
Free and open source under the MIT License. Original-author and dependency notices are preserved in THIRD-PARTY-NOTICES.md.