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Markdown Viewer and Editor

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I built an online viewer and editor for .md files where the file stays on your machine. Free to use and code is available under MIT License here: https://github.com/hattray/markdown-editorYou can also install it as a Chrome/Edge app so that it works for files on your desktop by double-clicking.Supports standard .md files with formatting, syntax-highlighting for code, table of contents, Mermaid diagrams, LaTeX via KaTex. Also supports exporting to .html, .pdf and .png.Please give it a try and share your feedback for improvements.

HN · launched Aug 31, 2026 · 34 upvotes (top 18%) · 0 views

Niche: markdown editors and viewers · 158 launches, 13 in the last 7 days ▲ +86% · Explore this niche →

Category and tags
  • Horizontal
  • Dev tools
  • Prosumer
  • Not AI
  • Hobby / open-source project

Visit website ↗ Source listing ↗

More like this: all 158 launches in markdown editors and viewers →

Could you build this?

Yes This is a client-side Markdown reader and editor leveraging the File System Access API and standard open-source Markdown parsing libraries in the browser.

Discussion

20 comments analyzed.

Competitors mentioned: OverType.dev, Milkdown.dev, VSCode/Cursor markdown preview, CodeMirror, Monaco editor

Concerns raised: No syntax highlighting in the editor, Monaco editor is too large (5MB+), Installation/file handler setup unclear for Chrome

Feature requests: Syntax highlighting in editor, Visual math equation editor for LaTeX, File Handler API integration for opening .md files

Competitors

Other products that read as similar to this one : 749 launches clear the similarity bar, closest 8 shown.

Attention rank: #105 of 750 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 281 days after the earliest competitor.

  • Noteline · ph · 2026-10-31 · 2 upvotes · similarity 0.72
  • MDFormats · ph · 2026-11-10 · 1 upvotes · similarity 0.64
  • Markdown Viewer · ph · 2026-10-18 · 1 upvotes · similarity 0.62
  • Markdown Pro Max · ph · 2026-10-19 · 1 upvotes · similarity 0.60
  • MD Glimpse · ph · 2026-10-28 · 1 upvotes · similarity 0.60
  • MD PDF Converter · ph · 2026-10-15 · 1 upvotes · similarity 0.60
  • mdprint · ph · 2026-09-22 · 2 upvotes · similarity 0.59
  • MDFK · ph · 2026-09-09 · 2 upvotes · similarity 0.58

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.