Users who open .md files in Chrome see raw markdown text instead of properly formatted HTML. This extension automatically converts markdown to rendered HTML with support for GFM, code highlighting, KaTeX math, Mermaid diagrams, and TOC generation.

Install extension → Enable 'Allow access to file URLs' in chrome://extensions → Open any .md/.markdown/.txt file locally or remotely in Chrome → Extension content script automatically detects markdown files and converts them to rendered HTML with syntax highlighting, diagrams, and optional TOC. Users can customize themes and behavior via the popup and options page.

Target users: Developers and technical writers who work with markdown documentation / Students and researchers using markdown for notes with math formulas / Anyone who wants to preview markdown files in Chrome without a separate editor

No login or payment code exists to analyze - the negative findings are very clear
Source package is complete with all files available for inspection

Monetization

No paid features detected

This is an open-source extension (GitHub: volca/markdown-preview) with all features freely available. No payment APIs, subscription gates, license checks, or upgrade prompts exist in the source code. All keyword hits for 'pro', 'license', 'stripe' come from bootstrap.css (progress bars, table-striped CSS classes, MIT license headers) - none relate to paid features. No features are gated behind any payment wall.

Confidence: 100
Payment platform: --
Source: AI / High
Login required: No
Reason: This is a purely local extension that renders markdown files as HTML within Chrome. It uses only local storage (chrome.storage.local) for settings. No authentication flows, login pages, OAuth endpoints, or account creation UI exist anywhere in the source. All keyword hits for 'account', 'auth', 'token', 'session' come from third-party libraries (highlight.js, jquery.js) or CONTRIBUTING.md about GitHub contributions - none relate to user authentication.

Permission risk

Medium-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

扩展能力较强：storage

Publisher

Linlinqi

Independent publisher

Email: [email protected]
Phone: --
Address: --

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Permissions

Host access