CorrectionCopy A COMPLETE LIBRARY OF 150 FREE TOOLS ONLINE

Markdown Editor Online with Live Preview & HTML Export

Write, format and review Markdown beside a sanitized live preview, then copy, print or download clean Markdown and HTML output.

Markdown writing workspace

Source editing, safe preview, document checks and export

Loading the secure live preview components…
Markdown source
0Words
0Characters
0Lines
0 minRead time
0Headings
Sanitized live preview

Document outline

0 headings

Add headings to create an outline.

Document checks

Editorial guidance

A practical online Markdown editor for writing and publishing

This browser workspace keeps Markdown source, rendered output and common document checks together. It is suitable for README files, technical notes, documentation, issue templates, articles, release notes and content that will later be placed in a static-site or content-management workflow.

Live split preview

Write beside the rendered result, switch to a single pane on smaller screens, and optionally synchronize the editor scroll position.

Safe rendered output

Generated HTML is sanitized before display. Active embedded content, unsafe URLs and event-handler attributes are removed.

Useful export choices

Copy source, HTML or plain text, download Markdown or standalone HTML, and open a print workflow for PDF output.

How to use the Markdown editor

1

Write or open Markdown

Type in the source editor, load the example, or choose and drop a UTF-8 Markdown or text file.

2

Use the formatting toolbar

Select text and apply headings, emphasis, lists, links, images, tables, code blocks and other Markdown patterns.

3

Review the safe live preview

Use Split, Editor or Preview view, adjust preview settings, and inspect the document outline and quality checks.

4

Copy or export the result

Copy Markdown, sanitized HTML or plain text, or download a prefixed Markdown or standalone HTML file.

5

Print, clear or reset

Open the print workflow, clear the current document with the two-step control, or restore the example and default settings.

Markdown syntax quick reference

Use the toolbar or type the syntax directly. The source remains plain text and can be opened by other Markdown-compatible applications.

PurposeMarkdown exampleRendered meaning
Heading## Section titleLevel-two heading
Emphasis**bold** and *italic*Strong and emphasized text
Link[Label](https://example.com)Clickable link
Image![Alt text](image.jpg)Image with alternative text
Task- [ ] Review draftUnchecked task item
Table| Name | Status |Structured table row
Code block```js … ```Fenced code block

Preview security, privacy and remote content

Sanitized preview

Markdown may contain raw HTML, so the rendered result is cleaned before it enters the preview. Scripts, forms, frames, unsafe attributes and dangerous URLs are excluded.

Remote images are opt-in

Remote images are blocked initially because loading them contacts another host. Enable them only for image URLs you trust.

Browser-session processing

The page has no tool-specific endpoint for typed or imported Markdown. Text, filenames and generated documents are not submitted by this tool.

Fixed browser components

The preview and sanitization code is loaded from fixed public resources. Those requests do not contain the Markdown source or generated output.

Compatibility, practical limits and troubleshooting

Current browsers

Chrome, Edge, Firefox and Safari support the core editor. Clipboard operations usually require HTTPS and browser permission.

UTF-8 text files

Imported Markdown must decode as UTF-8 and remain below 2 MB and 300,000 characters. Binary or differently encoded files are rejected.

No code execution

Fenced code blocks are displayed as text. The editor does not execute JavaScript, run shell commands or preview embedded applications.

Dependency failure

If the secure preview components cannot load, source editing and Markdown download remain available. Check the connection or content-blocking settings and refresh.

Remote image differences

Image hosts may block embedding, require authentication, reject hotlinking or return different content after export.

HTML styling varies

The standalone export uses neutral reading styles. Your destination website may apply different fonts, spacing, colors and component rules.

Markdown editor frequently asked questions

Answers about Markdown syntax, live preview, safe HTML, file import, export, mobile use and privacy.

What is this Markdown editor?

It is a browser-based Markdown writing workspace with a source editor, sanitized live preview, document statistics, formatting controls and Markdown or HTML export.

Does the preview update while I type?

Yes. Live preview is enabled by default and updates after a short delay so ordinary typing remains responsive. You can pause live preview and refresh it manually.

Which Markdown features are supported?

The editor supports headings, emphasis, strikethrough, links, images, blockquotes, ordered and unordered lists, task lists, tables, fenced code blocks, inline code and horizontal rules.

Does it support GitHub-style Markdown?

Yes. Common GFM-style features such as tables, strikethrough, task lists and autolinked URLs are enabled.

Is raw HTML allowed in Markdown?

Raw HTML may be parsed, but the preview is sanitized before display. Scripts, forms, embedded frames, event handlers and other unsafe elements or attributes are removed.

Can Markdown run JavaScript in the preview?

No. The preview removes scripts, event-handler attributes, unsafe URLs and active embedded content before rendered nodes are added to the page.

Why are remote images blocked by default?

Loading a remote image contacts the image host and may reveal normal request information such as an IP address. Enable remote images only when you trust the referenced URLs.

Can I enable remote images?

Yes. Select Load remote images in preview. Allowed images receive lazy-loading and no-referrer settings, while unsupported or unsafe sources remain blocked.

Do preview links open in a new tab?

They do by default. You can turn that behavior off in Preview settings. New-tab links receive noopener and noreferrer protections.

Can I open an existing Markdown file?

Yes. Choose or drag a UTF-8 .md, .markdown, .mdown, .mkd or .txt file into the editor workspace.

What is the maximum file size?

The local file picker accepts files up to 2 MB, and the editor limits a document to 300,000 characters to reduce the risk of an unresponsive browser tab.

What happens if a file is not UTF-8?

The tool rejects text that cannot be decoded as UTF-8 and asks you to save the file with UTF-8 encoding before trying again.

Can I download the Markdown source?

Yes. Download Markdown saves the exact source text in a .md file whose name begins with correctioncopy.com_.

Can I download rendered HTML?

Yes. Download HTML creates a standalone UTF-8 document containing the current sanitized preview and responsive reading styles.

Can I copy the generated HTML?

Yes. Copy HTML copies the sanitized preview fragment. It does not copy the editor controls or the surrounding CorrectionCopy page.

Can I copy plain text from the document?

Yes. Copy Plain Text copies the readable text content of the current sanitized preview without Markdown punctuation.

Can I print or save the preview as PDF?

Yes. Print Preview opens the browser print workflow for the rendered document. Most desktop and mobile browsers can save that print view as PDF.

Does the editor support keyboard shortcuts?

Yes. Common shortcuts include Control or Command plus B for bold, I for italic, K for a link and S for downloading the Markdown file.

Can I insert indentation with the Tab key?

Yes. Tab inserts two spaces in the source editor. Shift plus Tab removes up to two leading spaces from the selected lines.

Does list continuation work automatically?

Yes. Pressing Enter after an unordered, ordered or task-list item continues the marker. Press Enter on an empty list item to end the list.

What does the document outline show?

It lists rendered headings from levels one through four. Selecting an outline item scrolls the corresponding heading into view in the preview.

What are the document checks?

They flag practical issues such as a missing top-level heading, skipped heading levels, image syntax without alternative text, empty links and unclosed fenced code blocks.

Are document checks a Markdown validator?

No. They are focused editorial checks, not a complete CommonMark conformance test or accessibility audit.

Can I change the preview appearance?

Yes. Choose Document, Compact or Reader preview spacing without changing the generated Markdown or semantic HTML.

Can I use single line breaks as visible breaks?

Yes. Enable Convert single line breaks to render a line break without requiring a blank line. This setting affects the preview and exported HTML, not the source file.

Can I work in a larger distraction-free workspace?

Yes. Focus Mode expands the editor workspace to the viewport. Press Escape or select Exit Focus Mode to return to the page.

Is my Markdown uploaded to the server?

This page has no tool-specific upload or conversion endpoint. Typed and imported text is processed in the current browser session and is not submitted by the tool.

Does the page use an external processing component?

A fixed preview component and a fixed sanitization component are downloaded when the page opens. The request does not include your Markdown text, filename or generated output.

Does Reset remove the current document?

Reset Workspace restores the included example and default options. Clear Document uses a separate two-step confirmation and produces a blank editor.

Why might downloaded HTML differ from another website?

The exported content is semantic HTML with neutral reading styles. A separate website may apply different fonts, widths, colors, CSS resets or component styles.

Which browsers are expected to work?

Current stable Chrome, Edge, Firefox and Safari on desktop and mobile support the core editor, file reading, preview, copy and download workflows. Clipboard access normally requires a secure page.

More Free CorrectionCopy Tools

Continue with developer, text, SEO, document and recently completed CorrectionCopy tools selected from the active site catalog.