MD+HTML Reader

Product Introduction

1. Definition: MD+HTML Reader is a specialized, lightweight macOS utility application designed as a dedicated document review interface. It functions as a read-only Markdown and HTML viewer, optimized for inspecting documentation generated within modern AI-assisted software development and coding workflows.
2. Core Value Proposition: The product exists to solve document fragmentation in AI coding projects, providing a calm, focused workspace to review plans, specs, reports, and handoff notes. Its primary purpose is to filter project clutter and deliver a seamless Markdown preview and HTML preview experience, enabling efficient human review before the next AI prompt, git commit, or team handoff.

Main Features

1. Local Markdown & HTML Rendering Engine: The application reads and renders local .md and .html files directly on your macOS system. The Markdown parser supports advanced features including structured outline views and embedded Mermaid diagrams for visualizing flowcharts and sequences. HTML files are previewed in a sandboxed environment with support for local CSS styling, ensuring accurate representation without compromising security.
2. Intentionally Read-Only Interface: Designed to prevent accidental modification, MD+HTML Reader enforces a strict read-only mode. Users can inspect AI-generated documentation—such as release notes, API specifications, and QA checklists—without any risk of altering source files, dependency trees, or build artifacts. This creates a safe "inspection layer" separate from editable code.
3. Smart Recent Documents & Navigation: The app tracks recently viewed and recently modified documentation within your projects. This feature, combined with keyboard shortcuts and a fast search function, allows users to instantly jump back to relevant handoff notes or reports without navigating complex project directory structures, significantly speeding up multi-document review cycles.
4. Project-Scoped File Filtering: Unlike general-purpose editors, MD+HTML Reader automatically filters a project folder to surface only the human-readable Markdown and HTML documentation files. It ignores source code, node_modules, build logs, and other development noise, presenting only the content designed for human comprehension and review.

Problems Solved

1. Pain Point: AI coding tools generate a high volume of valuable but scattered documentation (agent summaries, diagrams, specifications) amidst a sea of technical files. Reviewing this content in traditional code editors or browsers leads to context switching, accidental edits, and wasted time locating the correct files.
2. Target Audience: The product is built for software developers using AI agents (e.g., Cursor, Claude Code, Gemini CLI), indie hackers, product managers, and technical writers who need to review and manage AI-generated project documentation as a core part of their workflow.
3. Use Cases: Essential for reviewing an AI agent's generated plan before execution, QA checklists before deployment, handoff documents during team collaboration, and visualizing Mermaid-based architecture diagrams. It serves as the final "human checkpoint" in human-AI collaborative coding sessions.

Unique Advantages

1. Differentiation: Compared to using an IDE like VS Code or a browser tab, MD+HTML Reader provides a noise-free environment exclusively for documentation. It lacks file editing capabilities, terminal access, and version control controls, which are distractions during a pure document review phase. It is more purpose-built and lightweight than a full-featured Markdown editor.
2. Key Innovation: The core innovation is its role-specific design for the AI collaboration workflow. It is not just a Markdown viewer, but a curated document layer that understands the output patterns of modern AI coding agents. Its sandboxed HTML preview and project-aware file filtering are technically tuned to handle the specific artifact types produced in this new development paradigm.

Frequently Asked Questions (FAQ)

1. Is there a better alternative to VS Code or a browser for reviewing AI-generated docs? Yes, for pure documentation review, MD+HTML Reader is superior. It eliminates the clutter of source code and project files found in VS Code, and provides a more focused, local-preview experience than a browser, which may not handle local Mermaid diagrams or project-specific CSS correctly.
2. Does MD+HTML Reader support my privacy by uploading files to the cloud? No. All document processing, rendering, and storage occur entirely locally on your macOS device. File names, paths, and content are never uploaded to any server, making it a secure choice for reviewing confidential project documentation.
3. What makes this different from other Markdown apps on the Mac App Store? MD+HTML Reader is uniquely optimized for the output of AI coding tools. Its key differentiators are project-file filtering (showing only docs), strict read-only mode to protect source code, and deep integration with Mermaid diagrams and sandboxed HTML previews—all focused on accelerating the human side of AI-assisted development.
4. Can I use MD+HTML Reader on Windows or Linux? Currently, MD+HTML Reader is a macOS-only application. Official versions for Windows and Linux are not yet available.
5. How does the free trial work for MD+HTML Reader? New installations receive a free trial period. Users can invite others to extend the trial, up to a maximum of 42 days total. Continued access beyond the trial period requires a paid subscription, which is priced as a low-cost utility for professionals.