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+<div class="info-box">
+
+Typst's HTML export is currently under active development. The feature is still
+very incomplete and only available for experimentation behind a feature flag. Do
+not use this feature for production use cases. In the CLI, you can experiment
+with HTML export by passing `--features html` or setting the `TYPST_FEATURES`
+environment variables to `html`. In the web app, HTML export is not available at
+this time. Visit the [tracking issue](https://github.com/typst/typst/issues/5512)
+to follow progress on HTML export and learn more about planned features.
+</div>
+
+HTML files describe a document structurally. The aim of Typst's HTML export is
+to capture the structure of an input document and produce semantically rich HTML
+that retains this structure. The resulting HTML should be accessible,
+human-readable, and editable by hand and downstream tools.
+
+PDF, PNG, and SVG export, in contrast, all produce _visual_ representations of a
+fully-laid out document. This divergence in the formats' intents means that
+Typst cannot simply produce perfect HTML for your existing Typst documents. It
+cannot always know what the best semantic HTML representation of your content
+is.
+
+Instead, it gives _you_ full control: You can check the current export format
+through the [`target`] function and when it is set to HTML, generate [raw HTML
+elements]($html.elem). The primary intended use of these elements is in
+templates and show rules. This way, the document's contents can be fully
+agnostic to the export target and content can be shared between PDF and HTML
+export.
+
+Currently, Typst will always output a single HTML file. Support for outputting
+directories with multiple HTML documents and assets, as well as support for
+outputting fragments that can be integrated into other HTML documents is
+planned.
+
+Typst currently does not output CSS style sheets, instead focussing on emitting
+semantic markup. You can of course write your own CSS styles and still benefit
+from sharing your _content_ between PDF and HTML. For the future, we plan to
+give you the option of automatically emitting CSS, taking more of your existing
+set rules into account.
+
+# Exporting as HTML
+## Command Line
+Pass `--format html` to the `compile` or `watch` subcommand or provide an output
+file name that ends with `.html`. Note that you must also pass `--features html`
+or set `TYPST_FEATURES=html` to enable this experimental export target.
+
+When using `typst watch`, Typst will spin up a live-reloading HTTP server. You
+can configure it as follows:
+
+- Pass `--port` to change the port. (Defaults to the first free port in the
+  range 3000-3005.)
+- Pass `--no-reload` to disable injection of a live reload script. (The HTML
+  that is written to disk isn't affected either way.)
+- Pass `--no-serve` to disable the server altogether.
+
+## Web App
+Not currently available.
+
+# HTML-specific functionality
+Typst exposes HTML-specific functionality in the global `html` module. See below
+for the definitions it contains.