diff --git a/src/render.ts b/src/render.ts
index a91b2d6..b95be89 100644
--- a/src/render.ts
+++ b/src/render.ts
@@ -26,14 +26,32 @@ export interface MarkdownExtension {
 }
 
 export async function render_markdown_to_html(markdown: string, options: MarkdownOptions = { }) {
-	const marked_options: marked.MarkedOptions & { async: true } = {
-		async: true,
+	const marked_options = marked_opts(true, options);
+	const unsafe_html = options.inline
+		? marked.parseInline(markdown, marked_options)
+		: await marked.parse(markdown, marked_options).then(resolve_async_bindings);
+
+	return sanitize_html(unsafe_html, options.custom_elements);
+}
+
+export function render_markdown_to_html_inline_sync(markdown: string, options: MarkdownOptions = { }) {
+	const marked_options = marked_opts(false, options);
+	setup_marked(options, marked_options);
+	const unsafe_html = marked.parseInline(markdown, marked_options);
+	return sanitize_html(unsafe_html, options.custom_elements);
+}
+
+function marked_opts<T extends boolean>(async: T, options: MarkdownOptions) : marked.MarkedOptions & { async: T } {
+	return {
+		async,
 		breaks: options.breaks || false,
 		renderer: create_renderer(options),
 		mangle: false,
 		headerIds: false,
 	};
+}
 
+function setup_marked(options: MarkdownOptions, marked_options: marked.MarkedOptions) {
 	marked.use({
 		walkTokens(token) {
 			base_url_walk_tokens(token, options);
@@ -60,45 +78,4 @@ export async function render_markdown_to_html(markdown: string, options: Markdow
 			}
 		},
 	});
-	
-	const unsafe_html = options.inline
-		? marked.parseInline(markdown, marked_options)
-		: await marked.parse(markdown, marked_options).then(resolve_async_bindings);
-
-	return sanitize_html(unsafe_html, options.custom_elements);
-}
-
-export function render_markdown_to_html_inline_sync(markdown: string, options: MarkdownOptions = { }) {
-	const marked_options: marked.MarkedOptions = {
-		baseUrl: options.base_url,
-		breaks: options.breaks || false,
-		renderer: create_renderer(options),
-	};
-
-	marked.use({
-		extensions: [
-			katex_block_ext(marked_options.renderer, options),
-			katex_inline_ext(marked_options.renderer, options),
-			footnote_ref_ext(marked_options.renderer, options),
-			footnote_list_ext(marked_options.renderer, options),
-			mark_ext(marked_options.renderer, options),
-			description_list_ext(marked_options.renderer, options),
-			section_ext(marked_options.renderer, options),
-			icon_ext(marked_options.renderer, options),
-			breadcrumb_nav_ext(marked_options.renderer, options),
-			...(options.extensions || [ ]).map((ext) => {
-				return ext(marked_options.renderer, options);
-			}),
-		],
-		tokenizer: {
-			url(src) {
-				// disable auto-linking; more can be added here to auto-link only sometimes
-				// see: https://github.com/markedjs/marked/issues/882#issuecomment-781628889
-				return null;
-			}
-		},
-	});
-	
-	const unsafe_html = marked.parseInline(markdown, marked_options);
-	return sanitize_html(unsafe_html, options.custom_elements);
 }