diff --git a/libr/core/gdiff.c b/libr/core/gdiff.c
index b42e923fef..614fd52171 100644
--- a/libr/core/gdiff.c
+++ b/libr/core/gdiff.c
@@ -159,3 +159,79 @@ R_API void r_core_diff_show(RCore *c, RCore *c2) {
 		}
 	}
 }
+
+/* Iterate available diffs and print json output */
+R_API void r_core_diff_show_json(RCore *c, RCore *c2) {
+	RList *fcns;
+	const char *match;
+	RListIter *iter;
+	RAnalFunction *f;
+	PJ *pj = r_core_pj_new (c);
+
+	if (!pj) {
+		return;
+	}
+
+	fcns = r_anal_get_fcns (c->anal);
+	if (r_list_empty (fcns)) {
+		R_LOG_ERROR ("No functions found, try running with -A or load a project");
+		return;
+	}
+
+	pj_a (pj);
+
+	r_list_foreach (fcns, iter, f) {
+		switch (f->type) {
+		case R_ANAL_FCN_TYPE_FCN:
+		case R_ANAL_FCN_TYPE_SYM:
+			switch (f->diff->type) {
+			case R_ANAL_DIFF_TYPE_MATCH:
+				match = "MATCH";
+				break;
+			case R_ANAL_DIFF_TYPE_UNMATCH:
+				match = "UNMATCH";
+				break;
+			default:
+				match = "NEW";
+				f->diff->dist = 0;
+			}
+
+			pj_o (pj);
+			pj_kn (pj, "addr", f->addr);
+			pj_ks (pj, "name", f->name? f->name: "");
+			pj_kn (pj, "size", r_anal_function_linear_size (f));
+			pj_kn (pj, "diff_addr", f->diff->addr);
+			pj_ks (pj, "diff_name", f->diff->name? f->diff->name: "");
+			pj_kn (pj, "diff_size", f->diff->size);
+			pj_ks (pj, "match", match);
+			pj_kd (pj, "dist", f->diff->dist);
+			pj_end (pj);
+
+			break;
+		}
+	}
+
+	fcns = r_anal_get_fcns (c2->anal);
+	r_list_foreach (fcns, iter, f) {
+		switch (f->type) {
+		case R_ANAL_FCN_TYPE_FCN:
+		case R_ANAL_FCN_TYPE_SYM:
+			if (f->diff->type == R_ANAL_DIFF_TYPE_NULL) {
+				pj_o (pj);
+				pj_kn (pj, "addr", f->addr);
+				pj_ks (pj, "name", f->name? f->name: "");
+				pj_kn (pj, "size", r_anal_function_linear_size (f));
+				pj_ks (pj, "match", "NEW");
+				pj_kd (pj, "dist", 0);
+				pj_end (pj);
+			}
+			break;
+		}
+	}
+
+	pj_end (pj);
+
+	char *s = pj_drain (pj);
+	printf ("%s\n", s);
+	free (s);
+}
diff --git a/libr/include/r_core.h b/libr/include/r_core.h
index 2a00292a9f..e7f7e63f05 100644
--- a/libr/include/r_core.h
+++ b/libr/include/r_core.h
@@ -842,6 +842,7 @@ R_API void r_core_hack_help(const RCore *core);
 R_API int r_core_hack(RCore *core, const char *op);
 R_API bool r_core_dump(RCore *core, const char *file, ut64 addr, ut64 size, int append);
 R_API void r_core_diff_show(RCore *core, RCore *core2);
+R_API void r_core_diff_show_json(RCore *core, RCore *core2);
 R_API void r_core_clippy(RCore *core, const char *msg);
 
 /* watchers */
diff --git a/libr/main/radiff2.c b/libr/main/radiff2.c
index 3d8fea71b5..ec1a6e07be 100644
--- a/libr/main/radiff2.c
+++ b/libr/main/radiff2.c
@@ -1054,7 +1054,7 @@ R_API int r_main_radiff2(int argc, const char **argv) {
 			break;
 		case 't':
 			ro.threshold = atoi (opt.arg);
-			printf ("%s\n", opt.arg);
+			// printf ("%s\n", opt.arg);
 			break;
 		case 'd':
 			delta = 1;
@@ -1211,7 +1211,11 @@ R_API int r_main_radiff2(int argc, const char **argv) {
 				r_core_zdiff (c, c2);
 			} else {
 				r_core_gdiff (c, c2);
-				r_core_diff_show (c, c2);
+				if (ro.diffmode == 'j') {
+					r_core_diff_show_json (c, c2);
+				} else {
+					r_core_diff_show (c, c2);
+				}
 			}
 		} else if (ro.mode == MODE_DIFF_SYMBOLS) {
 			int sz;