diff --git a/Documentation/btrfs-qgroup.asciidoc b/Documentation/btrfs-qgroup.asciidoc
index 360b3269..7863a4d9 100644
--- a/Documentation/btrfs-qgroup.asciidoc
+++ b/Documentation/btrfs-qgroup.asciidoc
@@ -87,6 +87,9 @@ the btrfs filesystem identified by <path>.
 *show* [options] <path>::
 Show all qgroups in the btrfs filesystem identified by <path>.
 +
+If enabled, this command supports extended output in json and json:compat modes.
+Use of either json mode implies -P and --raw.
++
 `Options`
 +
 -p::::
diff --git a/cmds-qgroup.c b/cmds-qgroup.c
index f9e81e30..fd637a45 100644
--- a/cmds-qgroup.c
+++ b/cmds-qgroup.c
@@ -301,6 +301,10 @@ static const char * const cmd_qgroup_show_usage[] = {
 	"               you can use '+' or '-' in front of each item.",
 	"               (+:ascending, -:descending, ascending default)",
 	"--sync         force sync of the filesystem before getting info",
+	"",
+#ifdef HAVE_JSON
+	"json and json:compat output implies -P and --raw.",
+#endif
 	NULL
 };
 
@@ -386,6 +390,10 @@ static int cmd_qgroup_show(const struct cmd_struct *cmd,
 	}
 	btrfs_qgroup_setup_units(unit_mode);
 
+	if (cmdcxt->output_mode == CMD_OUTPUT_JSON ||
+	    cmdcxt->output_mode == CMD_OUTPUT_JSON_COMPAT)
+		unit_mode = UNITS_RAW;
+
 	if (check_argc_exact(argc - optind, 1))
 		usage(cmd);
 
@@ -420,7 +428,15 @@ static int cmd_qgroup_show(const struct cmd_struct *cmd,
 					BTRFS_QGROUP_FILTER_PARENT,
 					qgroupid);
 	}
-	ret = btrfs_show_qgroups(fd, filter_set, comparer_set, verbose);
+
+	if (cmdcxt->output_mode == CMD_OUTPUT_JSON ||
+	    cmdcxt->output_mode == CMD_OUTPUT_JSON_COMPAT) {
+		bool compat = (cmdcxt->output_mode == CMD_OUTPUT_JSON_COMPAT);
+
+		ret = btrfs_qgroup_output_json(fd, filter_set, comparer_set,
+					       compat);
+	} else
+		ret = btrfs_show_qgroups(fd, filter_set, comparer_set, verbose);
 	close_file_or_dir(fd, dirstream);
 	free(filter_set);
 	free(comparer_set);
@@ -428,7 +444,9 @@ static int cmd_qgroup_show(const struct cmd_struct *cmd,
 out:
 	return !!ret;
 }
-static DEFINE_SIMPLE_COMMAND(qgroup_show, "show");
+static DEFINE_COMMAND(qgroup_show, "show", cmd_qgroup_show,
+		      cmd_qgroup_show_usage, NULL, 0,
+		      CMD_OUTPUT_FLAG(JSON)|CMD_OUTPUT_FLAG(JSON_COMPAT));
 
 static const char * const cmd_qgroup_limit_usage[] = {
 	"btrfs qgroup limit [options] <size>|none [<qgroupid>] <path>",
diff --git a/qgroup.c b/qgroup.c
index d076b1de..95d443db 100644
--- a/qgroup.c
+++ b/qgroup.c
@@ -16,12 +16,16 @@
  * Boston, MA 021110-1307, USA.
  */
 
+#include "version.h"
 #include "qgroup.h"
 #include <sys/ioctl.h>
 #include "ctree.h"
 #include "ioctl.h"
 #include "utils.h"
 #include <errno.h>
+#ifdef HAVE_JSON
+#include <json-c/json.h>
+#endif
 
 #define BTRFS_QGROUP_NFILTERS_INCREASE (2 * BTRFS_QGROUP_FILTER_MAX)
 #define BTRFS_QGROUP_NCOMPS_INCREASE (2 * BTRFS_QGROUP_COMP_MAX)
@@ -1398,6 +1402,224 @@ int btrfs_show_qgroups(int fd,
 	return ret;
 }
 
+#ifdef HAVE_JSON
+#define QGROUPID_FORMAT_BUF_LEN (20 + 20 + 1 + 1)
+static void format_qgroupid(char *buf, size_t size, u64 qgroupid)
+{
+	int ret;
+
+	ret = snprintf(buf, size, "%llu/%llu",
+		       btrfs_qgroup_level(qgroupid),
+		       btrfs_qgroup_subvid(qgroupid));
+	ASSERT(ret < sizeof(buf));
+}
+
+static json_object *export_one_u64(u64 value, bool compat)
+{
+	json_object *array, *tmp;
+
+	if (!compat)
+		return json_object_new_int64(value);
+
+	array = json_object_new_array();
+	if (!array)
+		return NULL;
+
+	tmp = json_object_new_int(value >> 32);
+	if (!tmp)
+		goto failure;
+	json_object_array_add(array, tmp);
+
+	tmp = json_object_new_int(value & 0xffffffff);
+	if (!tmp)
+		goto failure;
+	json_object_array_add(array, tmp);
+
+	return array;
+failure:
+	json_object_put(array);
+	return NULL;
+}
+
+static bool export_one_qgroup(json_object *container,
+			     const struct btrfs_qgroup *qgroup, bool compat)
+{
+	char buf[QGROUPID_FORMAT_BUF_LEN];
+	json_object *obj, *tmp;
+
+	obj = json_object_new_object();
+	if (!obj)
+		return false;
+
+	format_qgroupid(buf, sizeof(buf), qgroup->qgroupid);
+	tmp = json_object_new_string(buf);
+	if (!tmp)
+		return false;
+	json_object_object_add(obj, "qgroupid", tmp);
+
+	tmp = export_one_u64(qgroup->qgroupid, compat);
+	if (!tmp)
+		goto failure;
+	json_object_object_add(obj, "qgroupid_raw", tmp);
+
+	tmp = export_one_u64(qgroup->info.generation, compat);
+	if (!tmp)
+		goto failure;
+	json_object_object_add(obj, "generation", tmp);
+
+	tmp = export_one_u64(qgroup->info.referenced, compat);
+	if (!tmp)
+		goto failure;
+	json_object_object_add(obj, "referenced_bytes", tmp);
+
+	tmp = export_one_u64(qgroup->info.exclusive, compat);
+	if (!tmp)
+		goto failure;
+	json_object_object_add(obj, "exclusive_bytes", tmp);
+
+	tmp = export_one_u64(qgroup->limit.max_referenced, compat);
+	if (!tmp)
+		goto failure;
+	json_object_object_add(obj, "referenced_limit_bytes", tmp);
+
+	tmp = export_one_u64(qgroup->limit.max_exclusive, compat);
+	if (!tmp)
+		goto failure;
+	json_object_object_add(obj, "exclusive_limit_bytes", tmp);
+
+	if (btrfs_qgroup_level(qgroup->qgroupid) == 0) {
+		if (qgroup->pathname) {
+			tmp = json_object_new_string(qgroup->pathname);
+			if (!tmp)
+				goto failure;
+			json_object_object_add(obj, "pathname", tmp);
+		}
+	} else {
+		json_object *array = json_object_new_array();
+		struct btrfs_qgroup_list *list = NULL;
+
+		if (!array)
+			goto failure;
+		json_object_object_add(obj, "members", array);
+
+		list_for_each_entry(list, &qgroup->qgroups, next_qgroup) {
+			struct btrfs_qgroup *member = list->qgroup;
+			char buf2[QGROUPID_FORMAT_BUF_LEN];
+
+			format_qgroupid(buf2, sizeof(buf2), member->qgroupid);
+			tmp = json_object_new_string(buf2);
+			if (!tmp)
+				goto failure;
+
+			json_object_array_add(array, tmp);
+		}
+	}
+
+	json_object_object_add(container, buf, obj);
+	return true;
+failure:
+	json_object_put(obj);
+	return false;
+}
+
+#define BTRFS_JSON_WARNING \
+"This data contains 64-bit values that are incompatible with Javascript. Export in compatibility mode using --format=json:compat."
+
+static void export_all_qgroups(const struct qgroup_lookup *qgroup_lookup,
+			       bool compat)
+{
+
+	struct rb_node *n;
+	const char *json;
+	json_object *container, *dict, *obj;
+	struct btrfs_qgroup *entry;
+	int json_flags = JSON_C_TO_STRING_PRETTY;
+
+#ifdef JSON_C_TO_STRING_NOSLASHESCAPE
+	json_flags |= JSON_C_TO_STRING_NOSLASHESCAPE;
+#endif
+
+	container = json_object_new_object();
+	if (!container)
+		goto failure_msg;
+
+	obj = json_object_new_string(BTRFS_BUILD_VERSION);
+	if (!obj)
+		goto failure;
+	json_object_object_add(container, "exporter", obj);
+
+	if (!compat) {
+		obj = json_object_new_string(BTRFS_JSON_WARNING);
+		if (!obj)
+			goto failure;
+		json_object_object_add(container, "compatibility-warning", obj);
+
+		obj = json_object_new_string("64-bit");
+		if (!obj)
+			goto failure;
+		json_object_object_add(container, "u64-format", obj);
+	} else {
+		obj = json_object_new_string("array");
+		if (!obj)
+			goto failure;
+		json_object_object_add(container, "u64-format", obj);
+	}
+
+	dict = json_object_new_object();
+	if (!dict)
+		goto failure;
+	json_object_object_add(container, "qgroup_data", dict);
+
+	n = rb_first(&qgroup_lookup->root);
+	while (n) {
+		entry = rb_entry(n, struct btrfs_qgroup, sort_node);
+		if (!export_one_qgroup(dict, entry, compat))
+			goto failure;
+		n = rb_next(n);
+	}
+
+	json = json_object_to_json_string_ext(container, json_flags);
+	if (!json)
+		goto failure;
+
+	puts(json);
+
+	/* clean up container */
+	json_object_put(container);
+	return;
+
+failure:
+	json_object_put(container);
+failure_msg:
+	error("Failed to create JSON object.");
+}
+#endif
+
+int btrfs_qgroup_output_json(int fd,
+			     struct btrfs_qgroup_filter_set *filter_set,
+			     struct btrfs_qgroup_comparer_set *comp_set,
+			     bool compat)
+{
+#ifdef HAVE_JSON
+	struct qgroup_lookup qgroup_lookup;
+	struct qgroup_lookup sort_tree;
+	int ret = 0;
+
+	ret = qgroups_search_all(fd, &qgroup_lookup);
+	if (ret)
+		return ret;
+	__filter_and_sort_qgroups(&qgroup_lookup, &sort_tree,
+				  filter_set, comp_set);
+	export_all_qgroups(&sort_tree, compat);
+
+	__free_all_qgroups(&qgroup_lookup);
+
+	return ret;
+#else
+	return 0;
+#endif
+}
+
 int btrfs_qgroup_parse_sort_string(const char *opt_arg,
 				   struct btrfs_qgroup_comparer_set **comps)
 {
diff --git a/qgroup.h b/qgroup.h
index 688f92b2..4344c7d8 100644
--- a/qgroup.h
+++ b/qgroup.h
@@ -95,8 +95,12 @@ struct btrfs_qgroup_stats {
 
 int btrfs_qgroup_parse_sort_string(const char *opt_arg,
 				struct btrfs_qgroup_comparer_set **comps);
-int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,
-		       struct btrfs_qgroup_comparer_set *, bool verbose);
+int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *filter_set,
+		       struct btrfs_qgroup_comparer_set *comp_set,
+		       bool verbose);
+int btrfs_qgroup_output_json(int fd, struct btrfs_qgroup_filter_set *filter_set,
+			     struct btrfs_qgroup_comparer_set *comp_set,
+			     bool compat);
 void btrfs_qgroup_setup_print_column(enum btrfs_qgroup_column_enum column);
 void btrfs_qgroup_setup_units(unsigned unit_mode);
 struct btrfs_qgroup_filter_set *btrfs_qgroup_alloc_filter_set(void);
