How do AI-generated doc PRs get into DraftView?

Connect the GitHub App to your organization once. After that, every documentation PR in a connected repo (public or private) lands automatically in a shared review queue with its own lifecycle state, so nothing gets pasted in by hand and nothing falls through. You can still load any individual public PR by URL when you just want to try it.

Do my reviewers need a GitHub account?

No. Reviewers join your organization by email with a magic link and start reviewing right away, with no GitHub account or password. A GitHub-linked teammate then pushes their feedback upstream under a real account, so every suggestion stays properly attributed. For one-off outside reviewers like legal counsel or localization, you can also share a password-protected external link.

How does DraftView know which PRs were written by AI?

DraftView reads signals from the PR itself: the author, branch name, description, and commit trailers. Detection is generator-agnostic, so it works whether the docs came from Claude Code, Copilot, Cursor, or an in-house pipeline, and it is held to a strict precision bar before a label ever drives a filter or a metric. The label flags a PR for human review. It never blocks or merges anything on its own.

What happens after a reviewer requests changes?

Their comments and edits sync to GitHub as native review threads and Suggested Changes, so GitHub stays the single source of truth. When the agent pushes a new commit, the addressed view shows the before and after of the exact region they commented on, so the reviewer can confirm the feedback was really handled, not just that a line moved.

Does DraftView replace GitHub, or lock us in?

Neither. GitHub still owns your content, your comments, and the merge button. DraftView sits on top as a review layer you can add or remove at any time, and it never auto-merges. The one thing we keep that GitHub does not produce is the human-oversight record.

Can DraftView prove a human reviewed the AI's work?

Yes. Every sign-off writes an append-only record of who reviewed, what changed, how long they spent, and against which version. You can export a per-PR oversight audit, and the dashboard reports the share of AI doc PRs that received a substantive human review versus those rubber-stamped. That is the evidence a green checkmark cannot give you, framed around EU AI Act Article 14 human oversight.

Can DraftView actually block a PR from merging until a human reviews it?

Yes, on the Team plan and above. DraftView posts a draftview/human-review status check on every doc PR in the queue: pending until a maintainer signs off, green once they do. Mark it a required check in your branch protection rules and GitHub will refuse to merge AI-generated docs that no human has approved. And the sign-off stays fresh: if the agent pushes another change to the docs after approval, the check flips back to pending and the reviewer is asked to look again; a trivial rebase or code-only commit carries the approval forward.

Is DraftView free for open-source projects?

The Team plan is free for genuinely community-run open-source repos: public, OSI-licensed, and not the documentation of a commercial product. In return, your project links back to DraftView in one way of your choosing: a README badge, a link on your docs site, or DraftView-powered “Edit this page” links. Apply from your org settings: the link-back and license are verified automatically, and a human on our side approves each grant, so an enterprise publishing its product docs under an open-source license still uses a paid plan. OSS grants cover Team features only; Governance (audit exports, oversight metrics, compliance webhooks) is never part of the grant. If your request is declined and you believe that's a mistake, email ossgrant@draftview.app.

Which documentation formats are supported?

We currently support standard Markdown, MDX and AsciiDoc. AsciiDoc renders correctly, however some features may not be fully functional. We are actively working on improving AsciiDoc support. If you have specific format needs, please contact us to discuss how we can accommodate your workflow.

We use X platform for documentation. Can I still use DraftView?

We support Docusaurus, Mintlify, GitBook, Hugo, MkDocs, and any other platform that uses a GitHub-based workflow. As long as your files are in a GitHub repository, we can render the preview.

We use GitLab/Bitbucket. Can we still use your visual review engine?

Not yet. DraftView currently only supports GitHub. We are building integrations for GitLab and Bitbucket next. Contact us to request priority for your platform.

Yes, all data is encrypted at rest and in transit. We follow industry best practices for security and compliance, including SOC2 readiness. Your documentation, review sessions, and the human-oversight record are protected with enterprise-grade security measures.

Is there a free tier or trial available?

Yes. DraftView is free forever for individuals and small teams. Reviewing PRs (public or private) is unlimited, and the free plan includes a review queue for 2 repos with 2 active reviewers per month. Connecting your GitHub organization starts a 14-day free trial of the Team plan (unlimited repos and reviewers, no credit card); when it ends you simply drop back to the free plan, and nothing pauses. Team is $29/month per organization with 5 active reviewers included.

What is the best free online Markdown editor?

DraftView's browser editor stands out because it allows you to load Markdown and MDX files directly from GitHub or GitLab URLs and submit edits as pull requests.

Can I preview MDX files in a browser editor?

Yes, modern browser editors like DraftView render standard Markdown and preview MDX components side-by-side with your source code.

RoundupJuly 7, 20269 min read

Best Free Online Markdown Editors and Previewers in 2026

Setting up a local environment just to write and preview markdown is a hassle. These free browser-based Markdown and MDX editors let you edit, preview, and share files without installing any software.

Markdown is the standard format for modern documentation. From simple readme files to complex MDX-powered documentation sites, developers and writers use Markdown to compose content. However, editing and previewing these files often requires a local development environment. You must clone the repository, run a local server, and open a terminal. For a quick spelling fix or a simple content update, this process adds too much friction.

Browser-based Markdown editors solve this problem. They let you write, edit, and preview your content without installing any local tools. This post reviews the best free options available in 2026, their strengths, and where they fit in your documentation workflow.

What to Look for in a Markdown Preview Tool

Not all Markdown preview tools fit a professional documentation workflow. When you evaluate tools for your team, consider these criteria:

Visual and source modes: Writers and subject matter experts often prefer a visual word processor. Developers usually prefer a raw text editor with syntax highlighting. A great tool provides both modes and lets you switch between them.
Git integration: Documentation lives in repositories. The ability to load files from GitHub or GitLab and save edits back as pull requests or merge requests makes a tool much more useful.
MDX support: Many modern documentation sites (like Docusaurus, Next.js, and Astro) use MDX to embed interactive React components. Your editor should parse and render these components correctly.
Privacy: If you edit internal or pre-release documentation, your files must remain private. Choose tools that process content in the browser rather than uploading it to external servers.

1. DraftView Editor: Best for GitHub and GitLab Workflows

We built the DraftView Editor specifically for docs-as-code teams. It provides a visual rich-text editor and a raw source editor. You can use it to edit Markdown, MDX, and AsciiDoc files directly in your browser.

Disclosing this upfront: DraftView is our product. We designed it to eliminate the friction of making quick edits to repository files.

The key feature of DraftView is GitHub and GitLab import. You copy the URL of a file in your repository, paste it into DraftView, and start editing. You do not need to clone the repository or sign in to edit. When you complete your changes, you authenticate with GitHub or GitLab. DraftView then forks the repository, commits your edits, and opens a pull request or merge request from your account.

Best for: Technical writers, product managers, and subject matter experts who want to make quick updates to repository files without cloning the code or running terminal commands.

Limitations: DraftView works as a light editor for individual file updates. It does not replace a full desktop IDE for global search-and-replace or repository-wide reformatting.

Privacy: DraftView loads your files in the browser and connects directly to the GitHub or GitLab APIs. It does not store your content on its servers.

Open the Free DraftView Editor

2. VS Code for the Web (github.dev and vscode.dev): Best for Developers

Microsoft provides a browser-based version of VS Code. You can access it by pressing the dot key (.) on any GitHub repository, or by visiting vscode.dev. It provides the familiar VS Code interface, folder view, global search, and extension support in your browser.

It renders Markdown previews using the built-in preview pane. If you need MDX support, you can install the MDX extension from the marketplace.

Best for: Software engineers and technical writers who want a full desktop-style editor in the browser and need to make changes across multiple files.

Limitations: The interface is complex for non-technical reviewers or stakeholders who just want to fix typos. The visual preview is a static panel rather than a visual editing surface, so you must edit the raw Markdown source.

Privacy: Runs client-side in your browser.

3. StackEdit: Best for Standalone Drafting

StackEdit is a popular, open-source Markdown editor that runs in the browser. It features a split-pane layout with raw text on the left and a live preview on the right. It includes scroll synchronization, so the preview panel scrolls as you type.

StackEdit integrates with Google Drive, Dropbox, and GitHub. You can synchronize your files with these services, or export your documents to HTML or PDF.

Best for: Writers who need a reliable editor for drafting content from scratch and want to sync their notes to cloud storage.

Limitations: StackEdit lacks a visual editing mode. It does not support MDX components, and its GitHub integration is designed for simple file synchronization rather than structured pull request workflows.

Privacy: Processes all content locally in your browser.

4. Dillinger: Simple and Lightweight

Dillinger is a clean, browser-based Markdown editor. It uses a split-pane interface with a raw source editor on the left and a preview on the right. Dillinger supports drag-and-drop file imports and exports files to HTML, PDF, or styled Markdown.

Best for: Quick, one-off Markdown formatting tests or exporting formatted documents to HTML or PDF.

Limitations: Dillinger does not offer a visual editor, and it lacks MDX rendering. Its interface has not changed in several years, and it lacks modern repository integration tools.

5. HackMD: Best for Real-Time Collaboration

HackMD operates like Google Docs for Markdown. It lets multiple team members write and edit the same Markdown document in real time. It features a split-pane editor and supports custom themes, slide presentations, and book layouts.

Best for: Teams that want to collaborate on drafts, brainstorm ideas, or take meeting notes in Markdown.

Limitations: HackMD is a standalone platform. You must import and export files manually if you want to use them in a Git repository. It requires a paid plan for team workspaces and advanced features.

Comparison Summary

Tool	Visual Editor	Git Import & PRs	MDX Support	Real-Time Collaboration
DraftView	Yes	GitHub & GitLab	Yes	No
VS Code Web	No	GitHub only	Yes (with extension)	Via Live Share
StackEdit	No	Basic sync	No	No
Dillinger	No	Basic import	No	No
HackMD	No	Manual export	No	Yes

The Next Step: Reviewing the Pull Request

Selecting the right editor makes writing easier. However, the biggest bottleneck in documentation development is the review process.

Once you submit your Markdown pull request, your reviewers must verify the content. Technical writers and engineers can read the raw diffs on GitHub, but non-technical stakeholders (such as product managers, legal teams, and subject matter experts) find this difficult. They often ask writers to copy the content into Google Docs or Confluence, which creates version drift and manual copy-paste work.

DraftView solves this problem. It converts your Markdown pull request into a clean, visual review page. You generate a review link and share it with your team. Reviewers read the formatted text, highlight sections, and suggest edits in their browser without needing a GitHub account.

DraftView converts their comments and edits into native GitHub Suggested Changes, which appear directly on your pull request. You review the suggestions and merge them with one click.

By combining the DraftView Editor for writing and DraftView for reviews, you keep your entire documentation workflow in Git without forcing your stakeholders to use developer tools.

Resources

Markdown Editor: Free online Markdown and MDX editor with live preview.
ProseLint Web: Free browser-based Vale prose linter for style guides.
Docs Review Compare Index: Compare DraftView with Google Docs, Confluence, and GitHub.
DraftView Trial: Start reviewing documentation PRs visually with a public GitHub pull request.
VS Code Web: Browser-based VS Code interface for developers.
StackEdit: Open-source online Markdown editor with scroll synchronization.