Markdown parser done right. Fast and easy to extend.
- Follows the CommonMark spec + adds syntax extensions & sugar (URL autolinking, typographer).
- Configurable syntax! You can add new rules and even replace existing ones.
- High speed.
- Safe by default.
- Community-written plugins and other packages on npm.
Table of content
- Install
- Usage examples
- API
- Syntax extensions
- Benchmark
- markdown-it for enterprise
- Authors
- References / Thanks
node.js:
npm install markdown-itbrowser (CDN):
See also:
- API documentation - for more info and examples.
- Development info - for plugins writers.
// node.js
// can use `require('markdown-it')` for CJS
import markdownit from 'markdown-it'
const md = markdownit()
const result = md.render('# markdown-it rulezz!');
// browser with UMD build, added to "window" on script load
// Note, there is no dash in "markdownit".
const md = window.markdownit();
const result = md.render('# markdown-it rulezz!');Single line rendering, without paragraph wrap:
import markdownit from 'markdown-it'
const md = markdownit()
const result = md.renderInline('__markdown-it__ rulezz!');(*) presets define combinations of active rules and options. Can be
"commonmark", "zero" or "default" (if skipped). See
API docs for more details.
import markdownit from 'markdown-it'
// commonmark mode
const md = markdownit('commonmark')
// default mode
const md = markdownit()
// enable everything
const md = markdownit({
html: true,
linkify: true,
typographer: true
})
// full options list (defaults)
const md = markdownit({
// Enable HTML tags in source
html: false,
// Use '/' to close single tags (<br />).
// This is only for full CommonMark compatibility.
xhtmlOut: false,
// Convert '\n' in paragraphs into <br>
breaks: false,
// CSS language prefix for fenced blocks. Can be
// useful for external highlighters.
langPrefix: 'language-',
// Autoconvert URL-like text to links
linkify: false,
// Enable some language-neutral replacement + quotes beautification
// For the full list of replacements, see https://github.com/markdown-it/markdown-it/blob/master/lib/rules_core/replacements.mjs
typographer: false,
// Double + single quotes replacement pairs, when typographer enabled,
// and smartquotes on. Could be either a String or an Array.
//
// For example, you can use '«»„“' for Russian, '„“‚‘' for German,
// and ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'] for French (including nbsp).
quotes: '“”‘’',
// Highlighter function. Should return escaped HTML,
// or '' if the source string is not changed and should be escaped externally.
// If result starts with <pre... internal wrapper is skipped.
highlight: function (/*str, lang*/) { return ''; }
});import markdownit from 'markdown-it'
const md = markdownit
.use(plugin1)
.use(plugin2, opts, ...)
.use(plugin3);Apply syntax highlighting to fenced code blocks with the highlight option:
import markdownit from 'markdown-it'
import hljs from 'highlight.js' // https://highlightjs.org
// Actual default values
const md = markdownit({
highlight: function (str, lang) {
if (lang && hljs.getLanguage(lang)) {
try {
return hljs.highlight(str, { language: lang }).value;
} catch (__) {}
}
return ''; // use external default escaping
}
});Or with full wrapper override (if you need assign class to <pre> or <code>):
import markdownit from 'markdown-it'
import hljs from 'highlight.js' // https://highlightjs.org
// Actual default values
const md = markdownit({
highlight: function (str, lang) {
if (lang && hljs.getLanguage(lang)) {
try {
return '<pre><code class="hljs">' +
hljs.highlight(str, { language: lang, ignoreIllegals: true }).value +
'</code></pre>';
} catch (__) {}
}
return '<pre><code class="hljs">' + md.utils.escapeHtml(str) + '</code></pre>';
}
});linkify: true uses linkify-it. To
configure linkify-it, access the linkify instance through md.linkify:
md.linkify.set({ fuzzyEmail: false }); // disables converting email to linkIf you are going to write plugins, please take a look at Development info.
Embedded (enabled by default):
- Tables (GFM)
- Strikethrough (GFM)
Via plugins:
- subscript
- superscript
- footnote
- definition list
- abbreviation
- emoji
- custom container
- insert
- mark
- ... and others
By default all rules are enabled, but can be restricted by options. On plugin load all its rules are enabled automatically.
import markdownit from 'markdown-it'
// Activate/deactivate rules, with currying
const md = markdownit()
.disable(['link', 'image'])
.enable(['link'])
.enable('image');
// Enable everything
const md = markdownit({
html: true,
linkify: true,
typographer: true,
});You can find all rules in sources:
Here is the result of readme parse at MB Pro Retina 2013 (2.4 GHz):
npm run benchmark-deps
benchmark/benchmark.mjs readme
Selected samples: (1 of 28)
> README
Sample: README.md (7774 bytes)
> commonmark-reference x 1,222 ops/sec ±0.96% (97 runs sampled)
> current x 743 ops/sec ±0.84% (97 runs sampled)
> current-commonmark x 1,568 ops/sec ±0.84% (98 runs sampled)
> marked x 1,587 ops/sec ±4.31% (93 runs sampled)Note. CommonMark version runs with simplified link normalizers for more "honest" compare. Difference is ≈1.5×.
As you can see, markdown-it doesn't pay with speed for its flexibility.
Slowdown of "full" version caused by additional features not available in
other implementations.
Available as part of the Tidelift Subscription.
The maintainers of markdown-it and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. Learn more.
- Alex Kocharin github/rlidwka
- Vitaly Puzrin github/puzrin
markdown-it is the result of the decision of the authors who contributed to 99% of the Remarkable code to move to a project with the same authorship but new leadership (Vitaly and Alex). It's not a fork.
Big thanks to John MacFarlane for his work on the CommonMark spec and reference implementations. His work saved us a lot of time during this project's development.
Related Links:
- https://github.com/jgm/CommonMark - reference CommonMark implementations in C & JS, also contains latest spec & online demo.
- http://talk.commonmark.org - CommonMark forum, good place to collaborate developers' efforts.
Ports
- motion-markdown-it - Ruby/RubyMotion
- markdown-it-py- Python