diff --git a/lib/libfetch/http.c b/lib/libfetch/http.c
--- a/lib/libfetch/http.c
+++ b/lib/libfetch/http.c
@@ -1593,6 +1593,7 @@
 	off_t offset, clength, length, size;
 	time_t mtime;
 	const char *p;
+	char *fragment;
 	FILE *f;
 	hdr_t h;
 	struct tm *timestruct;
@@ -1632,6 +1633,13 @@
 		size = -1;
 		mtime = 0;
 
+		/* fragments are reserved for client-side processing, see
+		 * https://www.rfc-editor.org/rfc/rfc9110.html#section-7.1
+		 */
+		if ((fragment = strchr(url->doc, '#')) != NULL) {
+			*fragment = '\0';
+		}
+
 		/* check port */
 		if (!url->port)
 			url->port = fetch_default_port(url->scheme);