Headings, Emphasis, and Lists
Review H1-H6 headings, bold and italic text, blockquotes, horizontal rules, and ordered or unordered lists. Blank lines and indentation still affect how blocks are grouped.
Free online tool - no registration or login
Free Online Markdown Editor with Live Preview
Write or open Markdown and see a live preview as you edit. Copy or download the Markdown source or rendered HTML in your browser without registration or login.
- - Live GFM source and preview
- - Open .md, .markdown, or .txt
- - Copy or download Markdown and HTML
- - Current-tab processing without autosave
Markdown parsing, file reading, preview generation, and exports happen in this browser tab. External media is omitted from the sanitized preview, and the draft is not automatically persisted after reload or close.
How to Use the Online Markdown Editor
Move from editable source to a structural preview, then export the representation your next step needs.
Common Markdown review tasks
- Preview a README before committing it
- Check documentation headings, lists, tables, and code
- Review Markdown notes before copying them into another app
- Step 1
Write, Paste, or Open Markdown
Start empty, paste source, load the explicit sample, or open one .md, .markdown, or .txt file up to 2 MB.
- Step 2
Compare Source and Live Preview
Use Split on a wide screen or switch to Write or Preview when one pane needs more room. Review the rendered structure as you edit.
- Step 3
Copy or Download the Right Output
Keep raw Markdown for future editing, or use the separately labeled sanitized HTML copy and download actions for rendered output.
Preview Markdown Features as You Write
The editor covers standard Markdown structure and common GitHub Flavored Markdown extensions without executing diagrams, math, or code.
Tables, Task Lists, and Strikethrough
Preview GFM tables, checked and unchecked task-list items, and strikethrough text. Keep table separators and list markers aligned enough for the parser to recognize them.
Links, Inline Code, and Fenced Code Blocks
Check link text, destinations, inline code, and fenced code blocks. Code is displayed as text; this editor does not execute it or add language-specific highlighting.
Review a Markdown File Before You Export
Use the source and rendered view together to catch structural mistakes and choose the representation your next step actually needs.
Check README and Documentation Structure
Scan heading order, concise sections, lists, links, tables, and code samples before a commit or handoff. The measured counts help with scope but do not score writing quality.
Catch Spacing and Nesting Problems
A missing blank line, extra hash, broken table separator, or incorrect list indent becomes easier to spot when source and preview remain visible together.
Choose Markdown Source or Sanitized HTML
The .md file preserves editable Markdown syntax. HTML copy provides a sanitized fragment, while HTML download wraps that fragment in a simple standalone document.
Browser Privacy, Sanitization, and Preview Limits
Local processing reduces unnecessary data movement, but it does not make this preview identical to every publishing platform or preserve drafts automatically.
Your Draft Stays in the Current Browser Session
The page does not upload source text or imported files and does not use automatic browser-storage persistence. Reloading or closing the tab can discard unsaved changes.
Raw HTML and External Media Are Restricted
Scripts, event handlers, styles, iframes, images, audio, video, SVG, and MathML are removed from the preview and HTML export rather than executed or requested.
Rendering Can Differ Across Destinations
GitHub, documentation systems, and CMS platforms can apply different extensions, styles, link handling, and sanitization. Verify important output in its final destination.
Markdown Editor FAQ
Answers about GFM features, local files, sanitized HTML, draft persistence, export formats, and destination differences.
Is this Markdown editor free to use?
Yes. You can use the Markdown editor free online without registration or login. The page does not place the preview, copy actions, or downloads behind an account gate.
Does the editor upload or save my Markdown?
Your typed, pasted, or opened Markdown is processed in the current browser tab and is not sent to a conversion service. The editor does not automatically save drafts to browser storage, so copy or download your work before reloading or closing the page.
Can I open an existing Markdown file?
Yes. Open one .md, .markdown, or .txt file up to 2 MB. The browser reads the text locally and places it in the editor; other file types and multiple-file editing are not supported.
Does the preview support GitHub Flavored Markdown?
The preview uses GitHub Flavored Markdown parsing for tables, task lists, strikethrough, autolinks, fenced code, and standard Markdown structure. GitHub applies its own styling and post-processing, so this preview is not a pixel-perfect GitHub emulator.
Can I preview raw HTML in Markdown?
Raw HTML is parsed and then sanitized before it reaches the preview or HTML export. Scripts, event handlers, styles, embedded frames, and other restricted elements are removed rather than executed.
Why are Markdown images not shown?
Image, audio, video, and iframe elements are omitted from the sanitized preview and HTML export. This prevents the preview from requesting external media and avoids pretending that local relative asset paths can be resolved here.
Can I copy or download HTML?
Yes. Copy sanitized rendered HTML as a fragment or download a simple standalone .html document. Use the Markdown copy or .md download when you need editable source syntax instead.
Does the editor support Mermaid, math, or syntax highlighting?
No. Mermaid diagrams and math extensions are not executed. Fenced code blocks are displayed as code, but the editor does not add language-specific syntax highlighting.
Why does the preview look different on GitHub or in my CMS?
Markdown destinations can use different parser versions, extensions, CSS, link rules, and sanitization. Treat this preview as a structural review and verify important documents in the final publishing destination.
Will my draft still be here after I reload the page?
No automatic persistence is used. Reloading or closing the tab can discard the draft, which avoids silently retaining text on the device. Copy the source or download a file before leaving.
Related text tools
Measure a draft, verify exact limits, normalize headings, or compare two Markdown revisions.
MM Text
Measure Markdown Draft Length
Count words, characters, sentences, paragraphs, reading time, and speaking time as you type. Set a word goal and copy or clear your text with no login.
Open tool CE Text
Check Exact Text Limits
Count characters with or without spaces, words, lines, UTF-8 bytes, and emoji-related units. Set a custom character limit to see what remains or what exceeds it.
Open tool NH Text
Normalize Headings and Identifiers
Convert text to uppercase, lowercase, Title Case, sentence case, camelCase, snake_case, and more. Paste text, choose a format, then copy or download the result with no login.
Open tool CM Text
Compare Markdown Revisions
Compare two text versions with word- or line-level additions and removals. Import local files, review the changes, and copy or download a TXT report without signing in.
Open toolReady to preview Markdown?
Write, paste, or open one Markdown file, review the sanitized preview, and save the output you need.