Best Free Markdown Editors Compared - Dillinger and StackEdit Alternatives

# Best Free Markdown Editors Compared - Dillinger and StackEdit Alternatives

Why the choice still matters in 2026

Markdown editors are everywhere. Every text-editor extension supports it, every blogging platform accepts it, and IDEs ship live preview out of the box. So why do millions of people still open dillinger.io or stackedit.io every month?

Because sometimes you need to write Markdown without installing anything, without signing into anything, and without trusting the text to a vendor that will harvest it for AI training. A clean browser tab with split-pane preview, keyboard shortcuts, and zero friction is genuinely useful, especially for README drafts, GitHub issue bodies, or content pasted from one tool into another.

The choice is not neutral. Some editors do all the rendering in your browser. Others quietly send every keystroke through a server. Some have export pipelines that work offline; some need a network connection to produce a PDF. This post compares seven online Markdown editors in 2026 with that as the lens.

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The Comparison: 7 Markdown Editors

1. Dillinger.io

The incumbent. Bookmarked by enough developers that it appears in the autocomplete of most browsers.

What it does well:

• Split-pane editor with live HTML preview
• Cloud sync connectors for GitHub, Dropbox, Google Drive, OneDrive, and Bitbucket
• One-click export to Markdown, HTML, or PDF
• Built on the Monaco editor (the same engine that powers VS Code), which means keyboard handling and syntax highlighting feel like a real editor rather than a textarea
• No signup required for basic editing
• Open source on GitHub (joemccann/dillinger)

What to know:

• The cloud connectors require granting OAuth permissions to the Dillinger app. For private repos and Drive content, that is a real trust decision.
• PDF export is server-side. The content is sent to Dillinger's backend to render, then returned. That works fine for marketing copy, less fine for an internal SOP.
• The interface feels dated next to current minimal-Markdown tools. The visual style has not been updated significantly in years.

Verdict: Still the right pick when you want a familiar split-pane editor and have a benign use case (READMEs, blog drafts, public docs). Look elsewhere if your draft is sensitive.

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2. StackEdit

The local-first alternative. The story has been the same for years and it has held up.

What it does well:

• All rendering and processing happens in your browser. Drafts persist in localStorage and IndexedDB.
• Cloud sync is opt-in per file. You can write a thousand drafts and have none of them touch a server.
• WYSIWYG-ish split pane with rich keyboard support
• Publishes directly to Blogger, WordPress, and Zendesk
• Offline-capable. Once the page loads, you can disconnect and keep writing.

What to know:

• The PDF generation path is the exception to the local-first promise. It bundles a third-party renderer that requires a network call. If PDF export matters and privacy matters, this is the place to read the fine print.
• The interface has a lot of toolbars. Easy to dismiss them, but the first-load experience is busier than Dillinger's.
• Cloud sync conflicts are handled with a generic "conflict" indicator. Resolution is manual.

Verdict: The default when "the text should not leave the browser" is a non-negotiable. Closest thing to a desktop Markdown editor with no install.

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3. HackMD

The collaboration-first option. If two or more people need to edit the same Markdown document live, this is the answer.

What it does well:

• Real-time collaborative editing. Multiple cursors, presence indicators, the works.
• Markdown features beyond CommonMark: math (KaTeX), diagrams (Mermaid, GraphViz), spoilers, embedded YouTube
• Permission management per note (private, signed-in, public link, public list)
• GitHub sync at the note level
• Has both a free hosted tier and a self-hostable open-source version called CodiMD

What to know:

• Free tier is generous but limited in storage. Heavy users hit caps.
• Real-time collaboration requires a persistent connection to HackMD's servers. Not the right tool for private drafts of sensitive content.
• The full feature surface (diagrams, math, slide mode) makes it heavier than a basic editor. If you are writing a README, this is over-spec.

Verdict: Best in class for collaborative Markdown. Wrong choice for solo, private drafting.

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4. Notion

Not a Markdown editor in the traditional sense. Mentioned because it is what many people actually use when they want "a thing to write Markdown in."

What it does well:

• Pleasant interface, near-universal adoption
• Markdown-style shortcuts (type # to start a heading, etc.)
• Export to Markdown when you need the file format

What to know:

• Server-rendered. Every keystroke goes to Notion's backend.
• Not pure Markdown. The export to Markdown is lossy for nested databases, embeds, and other Notion-specific blocks.
• Requires an account and is heavily upsold beyond a small free tier.
• Inappropriate for any content you do not want sitting on Notion's infrastructure.

Verdict: Use it if you are already using it. Do not pick it just to write Markdown.

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5. iA Writer (Web)

Premium, but with a free trial path.

What it does well:

• Famously calm interface, focus mode, distraction-free writing
• Strong typography out of the box
• Syntax highlighting for prose (nouns, adjectives, etc.) which is genuinely useful for editing

What to know:

• Subscription required after the trial
• Cloud sync is iCloud-flavored, which limits cross-platform use
• Not the right tool for code-heavy Markdown. Better at long-form essays.

Verdict: Worth knowing if you write long-form. Not the default pick for technical Markdown.

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6. Editor.md

Open-source, self-hostable, embeddable.

What it does well:

• Drop-in for your own product if you need a Markdown editor on a page you control
• Full feature surface (TOC, code blocks, LaTeX, flowcharts, sequence diagrams)
• Pure JavaScript, no backend required for the editor itself

What to know:

• Not a hosted tool. You need to either embed it or run a small page that uses it. Not suitable for a "I just need to write something now" workflow.
• Project maintenance has slowed in recent years. Still functional, but less active than newer alternatives.

Verdict: A library, not a destination. Useful when you are building something else.

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7. ToolBox Markdown Preview

The privacy-first option in this list.

What it does well:

• All Markdown parsing and rendering happens in your browser
• No account, no signup, no cloud sync that you did not explicitly ask for
• Split-pane preview with the same shortcuts you expect from Dillinger
• Lives inside a broader privacy-first toolbox, so the next thing you do (encode a URL, hash a string, decode a JWT) is also one tab away
• Free, with no ad clutter on the editor surface

What to know:

• Single-file editing. If you need to manage twenty drafts at once, use StackEdit's file tree instead.
• Export is to Markdown or HTML. PDF export is intentionally not in scope because the privacy-first claim breaks the moment a renderer needs to run server-side.
• Younger tool than Dillinger or StackEdit. Fewer years of bookmarks behind it.

Verdict: The right pick when you want a clean Markdown surface without trusting a vendor with the content. Use it on top of a regular IDE workflow rather than as a replacement for one.

Try it: Markdown Preview

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How to choose

If your draft is sensitive (security write-up, internal memo, anything with credentials), the question is "where does the text live?" Anything server-rendered (Notion, HackMD, parts of Dillinger) is the wrong answer. StackEdit and ToolBox both pass this test.

If you need multi-user real-time editing, HackMD is the only serious option on this list.

If you want the most familiar interface and your content is public anyway, Dillinger is still fine. The aesthetic is dated but the editor is solid.

If you write long-form prose more than code, iA Writer is worth the subscription.

For everything else (one-off READMEs, GitHub issue bodies, quick conversions between Markdown and HTML), pick the most minimal tool you can tolerate. The less interface you fight, the more you write.

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Privacy worth checking, not assuming

"Client-side processing" is a claim. The way to verify it for any Markdown editor in this list is the same: open browser DevTools, switch to the Network tab, paste your draft into the editor, and watch what gets sent. A real client-side editor sends nothing on each keystroke. Servers-side editors will show a steady stream of POST requests. It takes thirty seconds and tells you the truth, regardless of what the marketing copy says.