How to Create Collapsible Sections in Markdown
A markdown collapsible section uses the HTML details and summary tags. The syntax, the blank-line rule that breaks it, and where it does and doesn't work.
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Markdown tips, macOS app news, and developer deep-dives.
How to Strike Through Text in Markdown
Markdown strikethrough uses double tildes on each side of the text. Where it works, where single tildes mean something else, and the HTML fallback.
Read moreMarkdown Horizontal Lines and Dividers
How to add a markdown horizontal line with ---, ***, or ___, and how to avoid the setext heading gotcha that silently turns your divider into an H2 heading.
Read moreHow to Center Text in Markdown
Markdown has no syntax to center text. Here are the HTML alignment tags that work, which ones GitHub keeps and which it strips, and how to center images, headings, and README badges.
Read moreMarkdown Blockquotes: Syntax, Nesting, and Common Mistakes
The complete guide to the markdown blockquote — greater-than syntax, multi-line quotes, lazy continuation, nesting, GitHub alerts, attribution patterns, and the mistakes that split them.
Read moreHow to Underline Text in Markdown
Markdown has no underline syntax. Here is the honest explanation why, the HTML workarounds that actually render, where each one gets stripped, and the Discord gotcha to watch for.
Read moreMarkdown Line Breaks and New Lines: Why They Don't Work Like You Expect
How to make a markdown line break actually appear — two trailing spaces, a backslash, a break tag, or a blank line — and why a plain new line in markdown gets silently ignored.
Read moreHow to Convert PDF to Markdown
Every practical way to convert PDF to markdown — purpose-built extractors, OCR for scans, AI tools, and online converters — plus what to check before you trust the output.
Read moreMarkdown Checkboxes and Task Lists: The Complete Guide
How to write a markdown checkbox with dash-bracket syntax, where task lists render and where they don't, how to nest them, and the small mistakes that quietly break them.
Read moreOpenMark 1.3: The Biggest Update Since Launch
OpenMark 1.3 adds an iPhone and iPad app, syntax-highlighted code blocks, custom fonts, reading width control, dark/light mode toggle, Mermaid v11 with Kanban diagrams, writing modes, 4 editor themes, and more. Every feature built from user feedback. $9.99 one-time.
Read moreMarkdown in the Age of AI Agents: How .md Files Became the Operating System of AI
AI agents like Claude Code, Cursor, and Windsurf don't just output markdown — they read it, follow instructions from it, and use it to coordinate with each other. Markdown has become the control layer of AI-assisted development.
Read moreHow to Preview Markdown on Mac: Every Method Compared
Every way to preview rendered markdown on macOS — Quick Look, VS Code, Terminal tools, browser extensions, and dedicated editors. Which is fastest, which renders the most, and which one to pick.
Read moreBest CLAUDE.md Viewer for Mac: Open and Read It Properly
The best apps to view CLAUDE.md files on Mac. See rendered tables, headings, and code blocks instead of raw markdown symbols. Compare TextEdit, VS Code, and dedicated viewers.
Read moreBest Apps to Open Claude Markdown Files on Mac
How to open markdown files from Claude — CLAUDE.md, docs, READMEs, specs, and more. The best apps to read Claude MD files on macOS, compared.
Read moreOpenMark Is Now on the Mac App Store
OpenMark, a native macOS markdown editor with Mermaid diagrams, LaTeX math, and Liquid Glass design, is officially available on the Mac App Store for $9.99.
Read moreDark Mode for Writing: Why It Matters for Focus and Eye Comfort
Why dark mode is beloved by writers and programmers. How dark interfaces reduce eye strain, improve focus, and support deep work. Research on dark vs light modes and how OpenMark uses dark rendering.
Read moreWhy Developers Are Leaving Notion for Plain Text and Markdown
The shift from Notion, Coda, and other all-in-one tools back to markdown and plain text. Vendor lock-in, export quality, offline work, speed, and portability. A balanced look at the trend.
Read moreHow to Export Markdown to PDF, HTML, and Word
Convert markdown to PDF, HTML, DOCX, and other formats using pandoc, online tools, and specialized apps. Learn when to use each format and the best workflows for your needs.
Read moreLocal-First Software: What It Means and Why It Matters
Understanding the local-first software movement. What it means for your data, privacy, and longevity. Examples of local-first apps and why OpenMark is built local-first.
Read moreMarkdown Extensions: GFM, MDX, and Beyond
Explore CommonMark, GitHub Flavored Markdown, MDX, and other extensions. Learn what each adds—tables, task lists, components—and when to use each format.
Read moreDraft Better Emails with Markdown
Write emails in markdown first to separate content from formatting. Learn templates, workflows, and tools to convert markdown to email—then send with confidence.
Read moreUsing Markdown for Daily Journaling
Discover how markdown's simplicity and portability make it ideal for journaling. Learn a date-based file structure, privacy benefits of local storage, and why plain text journals are future-proof.
Read moreMarkdown in Technical Writing Workflows
Learn how technical writers use markdown for structured documentation, version control, and collaboration. Explore markdown's advanced features and why it often outperforms DITA and DocBook.
Read moreMaster Markdown Keyboard Shortcuts for Faster Writing
Essential keyboard shortcuts for writing markdown efficiently. Learn universal markdown shortcuts, editor-specific commands, and productivity tips to write without touching the mouse.
Read moreBuild Your Personal Knowledge Base with Markdown
Create a future-proof personal wiki with plain markdown files and folders. Learn why portability beats proprietary apps, and how to structure your knowledge base for longevity.
Read moreNative Mac Apps vs Electron: Why It Matters
Understanding Electron, why it exists, and the real trade-offs vs native development. Memory usage, battery drain, launch speed, and OS integration. Why OpenMark chose native SwiftUI.
Read moreThe Plain Text Movement: Why Your Writing Should Last Forever
Explore why the plain text movement is gaining momentum. Discover how plain text files ensure longevity, enable version control, and unlock powerful tooling — advantages that proprietary formats simply cannot match.
Read moreWhy Markdown is the Standard for Software Documentation
Explore why markdown dominates software documentation, from READMEs to API docs. Learn how GitHub, MkDocs, and Docusaurus all rely on markdown—and why it matters for maintainability.
Read moreThe Return of One-Time Purchase Apps: Breaking Free From Subscriptions
Subscription fatigue is real. Discover why one-time purchase apps are making a comeback, how indie developers are thriving with this model, and why users are choosing to own their software instead of renting it.
Read moreMarkdown on GitHub: Master Issues, PRs, and Documentation
GitHub is built on markdown. Learn how to write better issues, pull requests, and documentation using GitHub-flavored markdown, autolinks, alerts, and collapsed sections. Practical tips for developers and technical writers.
Read moreHow to Organize Markdown Files on macOS: Folders, Tags, and Search
Master macOS organization for markdown files. Learn folder structures, naming conventions, Finder tags, Spotlight search, and how to set OpenMark as your default editor for .md files.
Read moreHow to Write Markdown: A Beginner's Guide to the Essentials
Learn the core markdown syntax in 15 minutes. Headings, bold, italic, lists, links, images, code blocks, and blockquotes. Perfect for beginners. Quick reference guide included.
Read moreMarkdown for Blogging: The Standard Format for Static Site Generators
Markdown is the de facto standard for blogging platforms and static site generators. Learn how Jekyll, Hugo, Next.js, Astro, and Ghost use markdown, the role of frontmatter, and how to structure blog posts for maximum portability.
Read moreHow to Use Markdown for Meeting Notes: Template and Best Practices
Master meeting notes with markdown. Template, structure, task lists, searchability, and portability. Better than Word or Google Docs for professional note-taking.
Read moreWhy Students Should Use Markdown for Notes, Essays, and Lab Reports
How markdown improves note-taking, essays, and lab reports for students. LaTeX for math, Mermaid for diagrams, portability across devices, version control, and clean formatting.
Read moreMarkdown Frontmatter and YAML: Metadata Headers Explained
What markdown frontmatter (YAML headers) is, how it works, and why it exists. Used in blogs, static site generators, Obsidian, and documentation tools.
Read moreMarkdown Quick Reference: Syntax Cheat Sheet for Mac
A concise bookmark-friendly markdown syntax reference. All common markdown elements, GitHub Flavored Markdown extensions, and examples. Save this page.
Read moreWhy AI Tools Output Markdown: The Technical Reason Behind Claude, ChatGPT, and Copilot
Why ChatGPT, Claude, and other AI models output markdown by default. Discover the technical reasons: token efficiency, semantic structure, and cross-platform portability.
Read moreHow to Search Markdown Files with Spotlight on Mac
Learn how Spotlight Indexing lets you instantly find content inside your markdown files on macOS — and how OpenMark makes it automatic.
Read moreThe Best Markdown Editor for AI-Generated Content
AI coding tools are creating an explosion of markdown files. Here's the best way to read, edit, and work with AI-generated markdown on Mac.
Read moreThe Best Markdown Editors for Mac in 2026
A fair comparison of the best markdown editors for macOS in 2026 — OpenMark, Obsidian, Typora, iA Writer, Bear, MacDown, and VS Code. Find the right tool for your workflow.
Read moreHow to Read ChatGPT and Claude Exports in Markdown
People export their AI conversations as markdown files. Here's how to export from ChatGPT and Claude, and the best way to read the resulting .md files on Mac.
Read moreWhat to Do with the Markdown Files Claude Code Creates
Claude Code generates a lot of markdown — CLAUDE.md, docs, READMEs, changelogs, specs. Here's how to read and edit them properly with a dedicated markdown viewer.
Read moreHow to Open .md Files on Mac: The Complete Guide
What is a .md file, why you're seeing more of them, and the best ways to open and read markdown files on Mac — from TextEdit to dedicated editors.
Read moreHow to Write a README.md That Developers Actually Read
A practical guide to writing README files that get read. Covers structure, formatting, code examples, Mermaid diagrams, and templates for open-source projects and CLI tools.
Read moreGetting Started with LaTeX Math in Markdown
A practical introduction to LaTeX math notation in markdown — inline equations, display formulas, and common symbols. Includes examples rendered with KaTeX.
Read moremacOS Tahoe Apps: The Best Native Apps with Liquid Glass Design
macOS Tahoe introduced Apple's Liquid Glass design language, and native apps are starting to adopt it. Here are the best Mac apps embracing the new aesthetic in 2026.
Read moreMarkdown Cheat Sheet for Mac Users — Syntax, Shortcuts & Tips
A complete markdown cheat sheet covering basic and extended syntax, LaTeX math, Mermaid diagrams, and Mac keyboard shortcuts. Bookmarkable quick reference.
Read moreMarkdown for Developers: README Files, Documentation, and More
A practical guide to markdown for developers — where it's used, advanced features most people skip, and why a dedicated editor beats VS Code's preview pane for writing.
Read moreMarkdown Tables: Complete Syntax Guide with Examples
Everything you need to know about markdown tables — GFM syntax, alignment, formatting cells, common gotchas, and when to use them (and when not to).
Read moreMarkdown vs Rich Text: Why Developers Prefer Plain Text
A practical comparison of markdown and rich text (Word, Google Docs, Notion). Why developers default to plain text, when rich text wins, and the role AI plays.
Read moreHow to Render Mermaid Diagrams in Markdown on Mac
A complete tutorial on Mermaid diagram syntax for markdown — flowcharts, sequence diagrams, Gantt charts, and more. Plus how to render them natively on Mac with OpenMark.
Read moreOpenMark vs Obsidian: When You Just Want a Markdown Editor
OpenMark and Obsidian are both markdown tools, but they solve completely different problems. Here's how to choose between them — no hype, just an honest comparison.
Read moreWhat Is a Markdown File? A Simple Guide for Non-Developers
A plain-language explanation of what markdown files (.md) are, why they're everywhere now, what the symbols mean, and how to open them on a Mac.
Read moreCLAUDE.md Explained: How to Configure Claude Code with Markdown
What is CLAUDE.md, why it matters, how to structure it, and best practices for configuring Claude Code's context with a well-written project instruction file.
Read moreWhy We Built OpenMark with SwiftUI and Liquid Glass
The story behind OpenMark — from the problem of editing markdown on Mac, through 19 rounds of failed WYSIWYG attempts, to the two-view architecture that shipped.
Read moreMarkdown for Project Managers: A Practical Guide
How project managers can use markdown for status updates, meeting agendas, decision logs, and project documentation without learning to code.
Read moreBuilding a Second Brain with Markdown Files
How to use plain markdown files as a personal knowledge management system — no proprietary tools, no subscriptions, no lock-in.
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