How to Write and Preview Markdown for Free Online
WikiPlus Markdown Editor at wikiplus.co provides a free browser-based Markdown writing environment with live preview — no signup, no installation, and no content sent to any server. Type Markdown on the left, see rendered HTML on the right in real time. Supports GitHub Flavored Markdown including tables, task lists, strikethrough, and fenced code blocks with syntax highlighting.
What GitHub Flavored Markdown (GFM) Includes
GitHub Flavored Markdown (GFM) extends standard Markdown with five additional features that have become the de facto standard for technical writing. Tables: pipe-delimited tables (| Col | Col |) render as proper HTML tables — essential for technical documentation. Task lists: checkboxes (- [ ] unchecked, - [x] checked) render as interactive checkboxes in GitHub and as visual checkboxes in other GFM-supporting tools. Strikethrough: ~~text~~ renders as struck-through text. Fenced code blocks: triple backtick blocks with optional language identifier (```javascript) render as syntax-highlighted code blocks. Autolinks: bare URLs (https://example.com without Markdown link syntax) automatically become clickable links. WikiPlus Markdown Editor supports all five GFM extensions plus standard Markdown, matching the rendering behavior of GitHub README files.
Live Preview: How It Works
WikiPlus Markdown Editor renders a live preview as you type using a JavaScript Markdown parser (running in your browser). Every keystroke triggers a re-render of the output panel — the delay is imperceptible on modern devices. The preview shows the formatted HTML output with proper heading styles, bold/italic text, code blocks with syntax highlighting, and rendered tables and images. The preview uses standard HTML/CSS rendering, so what you see matches what the Markdown would look like on most web platforms. For writing GitHub READMEs or documentation, the preview is an accurate proxy for the GitHub rendering — with minor differences in style (GitHub applies its own CSS, but the HTML structure is identical).
Exporting: HTML Copy and .md File Download
WikiPlus Markdown Editor provides two export paths. Copy HTML: copies the rendered HTML output to your clipboard — useful for pasting into a CMS (WordPress block editor, Ghost, Contentful) that accepts HTML input. Download .md: saves the Markdown source as a .md file — the standard format for README files, documentation systems, and static site generators. For GitHub README files: write in WikiPlus, download as README.md, and upload to your repository. For blog posts on Jekyll or Hugo: download as .md and place in the _posts or content directory. For Notion: copy the HTML output and paste using Ctrl+Shift+V (paste without formatting, then apply Notion's own formatting from the HTML).
Privacy: Why Local Processing Matters for Writing
Many online text editors — Google Docs, Notion, Draft — store your content on their servers and sync it to their database as you type. This is a feature for collaboration but a privacy concern for sensitive content. If you are drafting a confidential business proposal, a private journal entry, or proprietary technical documentation, writing in a server-synced editor means your content passes through and is stored by a third party. WikiPlus Markdown Editor processes entirely in your browser — no content is sent to wikiplus.co's servers. Your writing stays in browser memory until you explicitly download or copy it. For privacy-sensitive writing where the content should not touch third-party infrastructure, this local processing model is a meaningful advantage.
Frequently Asked Questions
- Is there a free Markdown editor with live preview online?
- Yes. WikiPlus Markdown Editor at wikiplus.co provides a free split-pane Markdown editor with live preview. Type in the left panel and see rendered HTML in the right panel in real time. No signup or account required. Supports GitHub Flavored Markdown including tables, task lists, fenced code blocks with syntax highlighting, and strikethrough. Export as HTML or download the .md file. The editor processes entirely in your browser — no content is transmitted to any server.
- What is the best browser-based Markdown editor in 2026?
- Top browser-based Markdown editors in 2026: WikiPlus Markdown Editor (wikiplus.co) — free, no account, local processing, GFM support. StackEdit — free with Google Drive sync, more features but requires login for cloud save. Dillinger — similar to WikiPlus, imports from GitHub/Dropbox, free. HackMD — collaborative real-time editing, requires account, good for teams. For zero-friction solo writing without an account, WikiPlus is the most immediate option. For team collaboration on Markdown documents, HackMD adds significant value.
- Can I use WikiPlus Markdown Editor to write GitHub README files?
- Yes. WikiPlus Markdown Editor renders GitHub Flavored Markdown — the same specification GitHub uses for README files. Write your README content in the editor, use the preview to verify formatting, then download as README.md. Upload or paste the README.md file into your GitHub repository. The rendered output on GitHub will match the WikiPlus preview with minor stylistic differences (GitHub applies its own CSS, but the HTML structure and all GFM features are identical).