# simov/markdown-viewer

Markdown Viewer / Browser Extension

Repository: https://github.com/simov/markdown-viewer
Canonical: https://ross.abutalabs.com/products/markdown-viewer
Language: JavaScript
License: MIT
License Family: permissive
Topics: chrome, firefox, markdown-viewer, browser-extension, chrome-extension, firefox-extension, firefox-addon, javascript, markdown, edge, edge-addon
Last push: 2025-12-29T22:39:42+00:00

## Health v2 (maintenance only)
Score: 49/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 59, release rhythm 8, longevity 100
- inputs: {"age_days": 4527, "days_push": 247, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1662, forks 221 (observed 2026-08-28T04:05:18.695182+00:00)

## What it is
A browser extension that renders Markdown files (local and remote) directly in Chrome, Firefox, Edge, and other Chromium-based browsers. It supports multiple Markdown parsers, 30+ themes, GFM, syntax highlighting, MathJax, Mermaid diagrams, and auto-reload on file change.

## Use cases
- view markdown files in the browser
- render local readme.md files with chrome extension
- preview markdown with github styling
- render mermaid diagrams and mathjax formulas in markdown
- auto reload markdown preview on file change
- view remote markdown files with proper content-type detection

## When to choose
- you read or write Markdown files and want them rendered nicely in the browser
- you need GFM, ToC, syntax highlighting, MathJax, or Mermaid support while previewing Markdown
- you want a secure, open-source viewer with granular control over which origins can render

## When to avoid
- you need a full Markdown editor with live editing rather than a viewer
- you need to render Markdown outside the browser or in a CLI pipeline
- you require themes larger than the 8KB custom theme limit

## Facets
- artifact type: plugin
- maturity: active
- function: markdown, parser, templating, theme
- domain: browser-extensions, documentation, web-development
- platform: browser-extension, browser, cross-platform
- tags: markdown-viewer, chrome-extension, firefox-addon, edge-addon, gfm, syntax-highlighting, mathjax, mermaid

## Member repositories
- simov/markdown-viewer (main) score 49

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:18.695182+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T08:19:41.954474+00:00, confidence not recorded.
  - readme: https://github.com/simov/markdown-viewer (fetched 2026-08-28T04:05:18.695182+00:00, sha a2c9a2a2e266)
- Data as of 2026-08-30T08:39:29.467469+00:00.