Best Markdown to HTML Converters in 2026: Compared and Tested
9 September 2026 · 19 min read
Every Markdown to HTML converter produces HTML. That is where the similarity ends. One returns a fragment with no <html> around it, another keeps the <script> tag somebody left in the file, a third loses your tables because it never implemented them. The file you get back is the product, and the differences only show up once you open it somewhere other than the tool that made it.
TL;DR
Pick by what you need to happen to the file, not by feature count. For a document you will send to somebody, you need a complete, self-contained HTML file with styles inline — not a fragment. For a document containing anything you did not write yourself, you need the converter to sanitise, because Markdown allows raw HTML and raw HTML allows scripts. For a build, pick the library your generator already uses and stop there. A browser-side converter covers the first case with nothing uploaded and no install; Pandoc covers the widest range of formats if you are willing to install it; marked, markdown-it and remark are the libraries everything else is built on.
Why "it converts Markdown" tells you almost nothing
Converting a Markdown file to HTML is four jobs in a row, and a tool can be careful about one and careless about the next. It parses the text into a tree, renders that tree into HTML tags, sanitises the result, and wraps it in a document. What actually happens to your file is worth reading in full, but the short version is that converters differ at every one of those four stages, and the differences are invisible until they bite.
The first stage decides flavour. Plain CommonMark has fenced code blocks but no tables, no task lists, no strikethrough and no autolinks. GitHub Flavored Markdown adds all four. Footnotes are in neither specification, so a converter that supports them does so as an extension. A file that renders correctly on GitHub and comes out wrong somewhere else usually met a parser running a smaller flavour — and the failure is silent, because a table the parser does not recognise is just a paragraph full of pipe characters.
The third stage decides whether your document can attack its reader. Markdown was designed to let raw HTML through, which means a .md file can contain <script>, onerror= and javascript: URLs, and a converter that renders faithfully will hand them all to the browser. This matters the moment you convert a file you did not write — a README from a repository, a document a client sent, anything pulled off the network. Sanitising is not optional for those files, and a surprising number of tools leave it to you.
The fourth stage decides whether the file opens. A converter that returns a fragment — <h1>Title</h1><p>Text</p> with nothing around it — has done its job as a library and failed it as a tool. Opened in a browser, that fragment renders as unstyled black text on white, at the browser's default font and full window width. It is technically correct HTML and it looks broken to everybody who receives it.
Quick comparison: the cheat sheet
| Tool | Best for | Key capability | Price |
|---|---|---|---|
| transformpipe | Sending somebody a finished document | Self-contained HTML, styles inline, converted in the browser | Free |
| Pandoc | Converting between many formats at once | ~40 formats, templates, --standalone and asset embedding |
Free, GPL |
| marked | Fast conversion inside a JS app | Small, quick, GFM out of the box | Free, MIT |
| markdown-it | Correctness and plugins | CommonMark-compliant, escapes raw HTML by default | Free, MIT |
| remark / unified | Transforming the document, not just rendering it | An AST you can walk and rewrite | Free, MIT |
| commonmark.js | Checking what the spec actually says | The reference implementation | Free, BSD |
| Showdown | Legacy JS projects already using it | Long-standing, pre-CommonMark converter | Free, MIT |
| Python-Markdown | Python build scripts | Extension API, powers MkDocs | Free, BSD |
| Goldmark | Go programmes and Hugo sites | CommonMark-compliant, fast, extensible | Free, MIT |
| Dillinger | Writing and exporting in one browser tab | Editor with HTML and PDF export, cloud sync | Free, MIT |
| StackEdit | Writing offline in a browser | In-browser editor, syncs to Drive, Dropbox, GitHub | Free, Apache 2.0 |
| Typora | A desktop editor you live in | WYSIWYG editing, exports HTML, PDF, Word | $14.99 one-time |
| VS Code | Converting while you are already coding | Built-in preview (markdown-it), export via extensions | Free |
| Static site generators | A site, not a document | Hugo, Eleventy, Docusaurus, MkDocs, Jekyll | Free |
| GitHub / GitLab | Reading, not exporting | Renders GFM; no export button | Free |
The best Markdown to HTML converters in 2026
transformpipe — best for a document you are going to send somebody
transformpipe converts a Markdown file to a complete HTML document in your browser and hands it back as one file with its styles inline. There is no install, no account required, and signed out the file is never sent anywhere — it is read, converted and rendered on your own machine.
| Pros | Cons |
|---|---|
| The export is one file that asks the network for nothing | Not a site generator: one document at a time, or several chained into one |
| Nothing is uploaded when you are signed out | The browser does the work, so a very large file is limited by the machine |
| Sanitises against one allow-list, in the browser and on the server alike | No templating language for custom layouts |
| Also converts HTML, Word, CSV and JSON back to Markdown |
Price: free. An account adds history, sharing and an API, also free.
Technical details and features
- GitHub Flavored Markdown: tables, task lists, strikethrough, autolinks, fenced code
- Output is a complete document — doctype, head, inline
<style>, no external requests of any kind - Raw HTML in the source passes through a sanitiser with a fixed allow-list before it reaches the page
- Downloads as
.html,.mdor plain text, or prints to PDF through the browser's own dialog - The same conversion is available from a REST API, a dependency-free CLI, a GitHub Action and an MCP server
Who should use it? Anybody whose next step is "send this to a person". The self-contained export is the point: it opens the same on a laptop with no connection as it does on yours, which is a specific property worth understanding before you email somebody a .md file and hope.
Pandoc — best for converting between many formats
Pandoc is a command line document converter written in Haskell that reads and writes around forty formats, Markdown and HTML among them. It is the most capable tool in this list by a wide margin, and the one you have to install.
| Pros | Cons |
|---|---|
| Converts between formats nothing else touches, including LaTeX and EPUB | Requires an install and a terminal |
--standalone produces a complete document, not a fragment |
Templates and filters are their own learning curve |
| Templates give exact control over the wrapper | No sanitising: raw HTML passes straight through |
| Assets can be embedded so the output is a single file | Flavour differences between its Markdown dialects surprise people |
Price: free, GPL licensed.
Technical details and features
- Its own extended Markdown dialect, plus CommonMark and GFM readers you select explicitly
--standalonewraps the output in a full document;--embed-resourcesinlines images and CSS--templateand Lua filters for rewriting the document mid-conversion--sandboxrestricts filesystem access when converting files you do not trust
Who should use it? Anybody converting on a schedule or into formats other than HTML — a manuscript pipeline, a documentation build, a repository that has to publish EPUB and PDF from the same source. How it compares for one-off Markdown to HTML jobs is a narrower question, and the answer is often that it is more tool than the job needs.
marked — best for speed inside a JavaScript app
marked is a small, fast Markdown parser and compiler for JavaScript, usable in the browser and in Node. It is one of the two libraries most JS projects reach for.
| Pros | Cons |
|---|---|
| Very fast and very small | Returns a fragment; wrapping it is your job |
| GitHub Flavored Markdown supported out of the box | Sanitising is explicitly not its responsibility |
| A simple API: one function, options object | Extension points are less structured than markdown-it's |
Price: free, MIT licensed.
Technical details and features
- GFM by default, with options for line breaks, heading ids and smart lists
- A lexer you can call separately to get tokens instead of HTML
- Custom renderers for overriding how any node type is emitted
- No built-in sanitiser: the documented answer is to pass the output through DOMPurify
Who should use it? Developers rendering Markdown inside an application where speed matters and the surrounding document already exists — a comment box, a preview pane, a chat message.
markdown-it — best for correctness and plugins
markdown-it is a CommonMark-compliant parser with a structured plugin system. It is what VS Code's own Markdown preview uses, which is a reasonable endorsement of its conformance.
| Pros | Cons |
|---|---|
| Passes the CommonMark specification suite | Slightly larger and slower than marked |
Escapes raw HTML by default, so html: false is the safe default |
Still returns a fragment |
| A real plugin ecosystem: footnotes, containers, attributes, anchors | Plugin quality varies |
Price: free, MIT licensed.
Technical details and features
- CommonMark by default, with GFM features available through presets and plugins
html: falseby default — raw HTML in the source is escaped rather than passed through- Rules can be added, replaced or reordered at the block and inline level
- Linkify and typographer options for autolinking and smart punctuation
Who should use it? Anyone who wants the spec followed and the extension points documented, and anybody whose safe default matters more than a few milliseconds.
remark and unified — best for changing the document, not just rendering it
remark parses Markdown into an abstract syntax tree and hands it to you. Rendering is one plugin at the end of a chain; the point is everything you can do before that.
| Pros | Cons |
|---|---|
| A real AST you can walk, query and rewrite | The heaviest option here by far |
| An enormous plugin ecosystem, including rehype for HTML output | The unified pipeline takes real learning |
| Powers MDX and Docusaurus, so it is well exercised | Overkill for turning one file into one page |
Price: free, MIT licensed.
Technical details and features
- mdast for Markdown, hast for HTML, with plugins to move between them
- remark-gfm for tables and task lists, remark-frontmatter for the header
- rehype-sanitize as a first-class step in the pipeline rather than an afterthought
- Used to build linters, formatters and codemods over prose, not only renderers
Who should use it? Teams doing something to the document on the way through — rewriting links, extracting headings, enforcing house style, generating MDX components.
commonmark.js — best for settling an argument about the spec
commonmark.js is the reference implementation of CommonMark, written by the specification's authors. Its purpose is conformance rather than features.
| Pros | Cons |
|---|---|
| The definitive answer to "what does the spec say?" | No tables, task lists or strikethrough — those are GFM |
| Small and predictable | Few extension points by design |
| Includes an AST | Not intended as an application's renderer |
Price: free, BSD licensed.
Who should use it? Anybody comparing parsers, writing one, or working out whether a rendering difference is a bug or a flavour. Reach for it when you need to know what plain CommonMark does, which is more often than people expect.
Showdown — best only if you already use it
Showdown is a JavaScript Markdown converter that predates CommonMark and is still maintained. It works, and there is no strong reason to choose it for something new.
| Pros | Cons |
|---|---|
| Long-standing and stable | Not CommonMark-compliant by design |
| Runs in the browser and Node | Flavour differences from GFM in edge cases |
| Option flags for most behaviours | Smaller ecosystem than marked or markdown-it |
Price: free, MIT licensed.
Who should use it? Projects already built on it. New work is better served by markdown-it.
Python-Markdown — best for Python build scripts
Python-Markdown is the long-standing Markdown implementation for Python, with an extension API that a great deal of documentation tooling is built on, MkDocs included.
| Pros | Cons |
|---|---|
| Mature extension API with many available extensions | Not CommonMark-compliant in every detail |
| Natural fit for a Python build pipeline | Slower than the JS and Go options |
| Tables, footnotes and attribute lists as official extensions | Fragment output; wrapping is yours |
Price: free, BSD licensed.
Who should use it? Python projects, and anyone extending MkDocs, where it is already the engine.
Goldmark — best for Go, and for Hugo sites
Goldmark is a CommonMark-compliant Markdown parser in Go, notable for being the engine inside Hugo since it replaced Blackfriday.
| Pros | Cons |
|---|---|
| CommonMark-compliant and fast | Go only |
| Extensible with a clean AST | Fragment output |
| Already in your stack if you use Hugo | Fewer ready-made extensions than the JS world |
Price: free, MIT licensed.
Who should use it? Go programmes, and Hugo users who want to understand what is rendering their content.
Dillinger — best for writing and exporting in one tab
Dillinger is an online Markdown editor with a live preview and export to HTML and PDF, plus sync to Dropbox, Google Drive, OneDrive and GitHub.
| Pros | Cons |
|---|---|
| Write and export without leaving the browser | Your document goes through a hosted service |
| Cloud sync to the usual places | Export styling is the tool's, not yours |
| Free and open source | Editor-first: not built for converting files you already have |
Price: free, MIT licensed.
Who should use it? People who are writing the document now and want a link or a file at the end of it.
StackEdit — best in-browser editor that works offline
StackEdit is an in-browser Markdown editor that keeps working without a connection and syncs to Google Drive, Dropbox and GitHub when it has one.
| Pros | Cons |
|---|---|
| Works offline once loaded | Editor-first, like Dillinger |
| Syncs and publishes to several destinations | Its own extended syntax can travel badly |
| Handles long documents comfortably | Export is styled its way |
Price: free, Apache 2.0 licensed.
Who should use it? Writers who want a serious editor in a browser tab and publish from it.
Typora — best desktop editor with export
Typora is a desktop Markdown editor with a WYSIWYG editing mode — the Markdown is replaced by its rendering as you type — and export to HTML, PDF, Word and more.
| Pros | Cons |
|---|---|
| The most comfortable writing experience in this list | Paid, and desktop only |
| Exports to HTML, PDF and Word with themes | WYSIWYG hides the syntax, which some writers dislike |
| Local files, nothing uploaded | Not a batch or build tool |
Price: $14.99, a one-time purchase covering up to three devices, with a 15-day free trial (checked on typora.io, 8 September 2026).
Who should use it? People who write Markdown daily and want an application rather than a tab.
VS Code — best if you are already in it
VS Code ships a Markdown preview built on markdown-it, and extensions add export. If the file is already open in your editor, this is the shortest path from text to page.
| Pros | Cons |
|---|---|
| Already installed, for most developers | Export needs an extension, and extensions vary |
| Preview matches markdown-it's CommonMark behaviour | Not a pipeline: it converts what is open |
| Extensions cover HTML, PDF and slide export | Preview styling is not the exported styling |
Price: free.
Who should use it? Developers converting a README or a note in passing. The specifics of doing it well in VS Code come down to which extension you pick and what it puts around the fragment.
Static site generators — the answer when you want a site
Hugo, Eleventy, Docusaurus, MkDocs and Jekyll all convert Markdown to HTML, and none of them is a converter. They are build systems: they expect a directory, a configuration file, templates and a deployment target, and they give you navigation, feeds and cross-links in return.
| Pros | Cons |
|---|---|
| Navigation, search and templating across many documents | Enormous overhead for one file |
| Fast, well-documented, widely deployed | A configuration file and a build step to maintain |
| Themes and plugin ecosystems | The output is a site, not a document you can email |
Price: free.
Who should use it? Anybody publishing a set of documents that link to each other. If you have one file and a person to send it to, you do not need a generator — you need a file.
GitHub and GitLab — renderers, not converters
Both render GFM beautifully and neither gives you an export button. You can get HTML out of GitHub's Markdown API, and you can save the rendered page from your browser, but what you save comes wrapped in their application's markup and stylesheets.
Who should use it? Nobody, for conversion. Both are excellent places to read Markdown and the wrong place to convert it.
What the comparison tables leave out
Vendor pages compete on features. The things that actually decide whether a converted file works are rarely on the list.
Whether the output is a document. This is the single most common disappointment. Libraries return fragments, correctly and by design; several online tools do the same. You paste the result into a file, open it, and get unstyled text at the browser's default width. A tool that hands you a complete document — doctype, head, styles — has made a decision on your behalf that a library cannot make.
Whether the file needs the network. An export that links a stylesheet or a font from a CDN stops looking right the moment it is opened offline, and it tells whoever opens it something about where the file has been. A self-contained file carries its styles inline and requests nothing. It is larger, and it is the only version that behaves the same everywhere.
Whether raw HTML survives. Faithful rendering and safe rendering are different goals, and every tool here picks one. markdown-it escapes raw HTML unless told otherwise. marked passes it through and says so. Pandoc passes it through. If the file came from somebody else, you need to know which of those you are using before you open the result in a browser.
Where the file goes. An online converter that uploads is an online converter that has your document. For a public README this is irrelevant; for a contract, a patient note or an unreleased plan it is the whole question. Browser-side conversion means the file never leaves the machine, and that is verifiable — open the network tab and watch nothing happen.
What it does with the header. A Markdown file from a static site or a note-taking app usually starts with YAML front matter. Some converters strip it, some render it as a paragraph of key: value lines at the top of your document, and a few turn it into a table. None of those is wrong, and only one of them is what you wanted.
How to choose
The criteria below are the short version; the requirements worth writing down before you compare anything go further.
- Start from the destination. Sending it to a person needs a self-contained document. Publishing a set of pages needs a generator. Rendering inside an application needs a library. These are three different tools and the wrong one is obvious in hindsight.
- Match the flavour to the file. If the document has tables or task lists, the converter must do GFM, not plain CommonMark. Convert one representative file and look at the tables before you commit to anything.
- Decide about sanitising before you convert somebody else's file. For your own notes it does not matter. For anything that arrived from outside, either the converter sanitises or you do.
- Count the installs. A one-off conversion should not require a package manager. A nightly build should not require a browser tab and a person in it.
- Open the result somewhere else. Not in the tool's preview — in a different browser, on a different machine, with the network off. That is the test that catches fragments, missing styles and CDN links all at once, and it takes a minute.
Conclusion
The best Markdown to HTML converter is the one whose output survives the trip. For a document with a recipient, that means a complete file with its styles inline, sanitised, produced without uploading the source anywhere — which is what transformpipe's Markdown to HTML conversion does in your browser, free, with no install and nothing to sign up for. For a build, use the library your generator already depends on. For anything involving formats beyond HTML, install Pandoc and learn its templates; it will outlast every other tool on this page.
FAQ
What is the best free Markdown to HTML converter?
For a finished document, a browser-side converter that produces self-contained HTML is the best free option: no install, no upload, and a file that opens anywhere. A browser-side converter does this at no cost. For conversion inside your own code, marked and markdown-it are both free and MIT licensed, and Pandoc is free for the command line.
How do I convert Markdown to HTML without installing anything?
Use a converter that runs in the browser. Drop the .md file on the page and download the HTML — no package manager, no terminal, and with a browser-side tool the file is never uploaded, which you can confirm by watching the network tab while it converts.
Why does my converted HTML look unstyled?
Because you were given a fragment rather than a document. Libraries return <h1>…</h1><p>…</p> with no <html>, <head> or styles around it, and a browser renders that at its default font and full window width. You need a converter that wraps the output in a complete document, or you need to write that wrapper yourself.
Do Markdown to HTML converters keep tables?
Only if they implement GitHub Flavored Markdown. Tables are not part of the CommonMark specification, so a strictly compliant parser renders a table as a paragraph containing pipe characters. If your documents have tables, test one before choosing a converter — tables are the most common thing to break on the way across.
Is it safe to convert a Markdown file somebody sent me?
Only with a converter that sanitises. Markdown permits raw HTML, so a .md file can carry <script> tags, onerror handlers and javascript: URLs, and a faithful renderer will pass every one of them to your browser. Check whether the tool sanitises by default before you open the output.
Can I convert Markdown to HTML from the command line or a CI job?
Yes. Pandoc is the general answer, and most languages have a library with a CLI wrapper. If the job is part of a pull request or a nightly build, a converter with an API or a GitHub Action removes the install from your runner entirely.
What is the difference between marked and Marked 2?
They are unrelated products with confusingly similar names. marked is the open-source JavaScript library described above. Marked 2 is a paid macOS Markdown preview application. Searching for one reliably returns the other.