diff --git a/content/handlers/html/box_construct.c b/content/handlers/html/box_construct.c
index fba97641d..f1ea71d3b 100644
--- a/content/handlers/html/box_construct.c
+++ b/content/handlers/html/box_construct.c
@@ -38,6 +38,7 @@
 #include "desktop/gui_internal.h"
 
 #include "html/html_internal.h"
+#include "html/object.h"
 #include "html/box.h"
 #include "html/box_manipulate.h"
 #include "html/box_construct.h"
diff --git a/content/handlers/html/box_special.c b/content/handlers/html/box_special.c
index 9f4a51201..2d3bd054b 100644
--- a/content/handlers/html/box_special.c
+++ b/content/handlers/html/box_special.c
@@ -42,6 +42,7 @@
 
 #include "html/html.h"
 #include "html/html_internal.h"
+#include "html/object.h"
 #include "html/box.h"
 #include "html/box_manipulate.h"
 #include "html/box_construct.h"
diff --git a/content/handlers/html/html_internal.h b/content/handlers/html/html_internal.h
index 6b5533492..ae3182a07 100644
--- a/content/handlers/html/html_internal.h
+++ b/content/handlers/html/html_internal.h
@@ -367,25 +367,6 @@ nserror html_css_fetcher_register(void);
 nserror html_css_fetcher_add_item(dom_string *data, nsurl *base_url,
 		uint32_t *key);
 
-/* in html/html_object.c */
-
-/**
- * Start a fetch for an object required by a page.
- *
- * \param  c                 content of type CONTENT_HTML
- * \param  url               URL of object to fetch (copied)
- * \param  box               box that will contain the object
- * \param  permitted_types   bitmap of acceptable types
- * \param  background        this is a background image
- * \return  true on success, false on memory exhaustion
- */
-bool html_fetch_object(html_content *c, nsurl *url, struct box *box, content_type permitted_types, bool background);
-
-nserror html_object_free_objects(html_content *html);
-nserror html_object_close_objects(html_content *html);
-nserror html_object_open_objects(html_content *html, struct browser_window *bw);
-nserror html_object_abort_objects(html_content *html);
-
 /**
  * Complete the HTML content state machine *iff* all scripts are finished
  */
diff --git a/content/handlers/html/object.c b/content/handlers/html/object.c
index c20118d69..e8cdc7db9 100644
--- a/content/handlers/html/object.c
+++ b/content/handlers/html/object.c
@@ -44,6 +44,7 @@
 #include "html/box.h"
 #include "html/box_inspect.h"
 #include "html/html_internal.h"
+#include "html/object.h"
 
 /* break reference loop */
 static void html_object_refresh(void *p);
@@ -489,6 +490,7 @@ html_object_callback(hlcache_handle *object,
 	return NSERROR_OK;
 }
 
+
 /**
  * Start a fetch for an object required by a page, replacing an existing object.
  *
@@ -496,7 +498,6 @@ html_object_callback(hlcache_handle *object,
  * \param  url             URL of object to fetch (copied)
  * \return  true on success, false on memory exhaustion
  */
-
 static bool html_replace_object(struct content_html_object *object, nsurl *url)
 {
 	html_content *c;
@@ -549,7 +550,6 @@ static bool html_replace_object(struct content_html_object *object, nsurl *url)
 /**
  * schedule callback for object refresh
  */
-
 static void html_object_refresh(void *p)
 {
 	struct content_html_object *object = p;
@@ -571,6 +571,8 @@ static void html_object_refresh(void *p)
 	}
 }
 
+
+/* exported interface documented in html/object.h */
 nserror html_object_open_objects(html_content *html, struct browser_window *bw)
 {
 	struct content_html_object *object, *next;
@@ -592,6 +594,8 @@ nserror html_object_open_objects(html_content *html, struct browser_window *bw)
 	return NSERROR_OK;
 }
 
+
+/* exported interface documented in html/object.h */
 nserror html_object_abort_objects(html_content *htmlc)
 {
 	struct content_html_object *object;
@@ -632,6 +636,8 @@ nserror html_object_abort_objects(html_content *htmlc)
 	return NSERROR_OK;
 }
 
+
+/* exported interface documented in html/object.h */
 nserror html_object_close_objects(html_content *html)
 {
 	struct content_html_object *object, *next;
@@ -654,6 +660,8 @@ nserror html_object_close_objects(html_content *html)
 	return NSERROR_OK;
 }
 
+
+/* exported interface documented in html/object.h */
 nserror html_object_free_objects(html_content *html)
 {
 	while (html->object_list != NULL) {
@@ -675,8 +683,7 @@ nserror html_object_free_objects(html_content *html)
 }
 
 
-
-/* exported interface documented in html/html_internal.h */
+/* exported interface documented in html/object.h */
 bool
 html_fetch_object(html_content *c,
 		  nsurl *url,
diff --git a/content/handlers/html/object.h b/content/handlers/html/object.h
new file mode 100644
index 000000000..85734fd94
--- /dev/null
+++ b/content/handlers/html/object.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2020 Vincent Sanders <vince@netsurf-browser.org>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \file
+ * HTML content object interface
+ */
+
+#ifndef NETSURF_HTML_OBJECT_H
+#define NETSURF_HTML_OBJECT_H
+
+struct html_content;
+struct browser_window;
+struct box;
+
+/**
+ * Start a fetch for an object required by a page.
+ *
+ * The created content object is added to the HTML content which is
+ *  updated as the fetch progresses. The box (if any) is updated when
+ *  the object content becomes done.
+ *
+ * \param c content of type CONTENT_HTML
+ * \param url URL of object to fetch
+ * \param box box that will contain the object or NULL if none
+ * \param permitted_types bitmap of acceptable types
+ * \param background this is a background image
+ * \return true on success, false on memory exhaustion
+ */
+bool html_fetch_object(struct html_content *c, nsurl *url, struct box *box, content_type permitted_types, bool background);
+
+/**
+ * release memory of content objects associated with a HTML content
+ *
+ * The content objects contents should have been previously closed
+ *  with html_object_close_objects().
+ *
+ * \param html The html content to release the objects from.
+ * \return NSERROR_OK on success else appropriate error code.
+ */
+nserror html_object_free_objects(struct html_content *html);
+
+/**
+ * close content of content objects associated with a HTML content
+ *
+ * \param html The html content to close the objects from.
+ * \return NSERROR_OK on success else appropriate error code.
+ */
+nserror html_object_close_objects(struct html_content *html);
+
+
+/**
+ * open content of content objects associated with a HTML content
+ *
+ * \param html The html content to open the objects from.
+ * \param bw Browser window handle to open contents with.
+ * \return NSERROR_OK on success else appropriate error code.
+ */
+nserror html_object_open_objects(struct html_content *html, struct browser_window *bw);
+
+
+/**
+ * abort any content objects that have not completed fetching.
+ *
+ * \param html The html content to abort the objects from.
+ * \return NSERROR_OK on success else appropriate error code.
+ */
+nserror html_object_abort_objects(struct html_content *html);
+
+#endif