diff --git a/applications/resdata/convert.c b/applications/resdata/convert.c
index 95f3b9aa2..f59b7b1e7 100644
--- a/applications/resdata/convert.c
+++ b/applications/resdata/convert.c
@@ -67,6 +67,7 @@ void file_convert(const char *src_file, const char *target_file,
 }
 
 int main(int argc, char **argv) {
+    fprintf(stderr, "** Warning: convert.x is deprecated. Use resfo instead\n");
     if (argc == 1) {
         fprintf(stderr,
                 "Usage: convert.x <filename1> <filename2> <filename3> ...\n");
diff --git a/applications/resdata/grdecl_grid.c b/applications/resdata/grdecl_grid.c
index 3ceb4e398..7c37ddbfd 100644
--- a/applications/resdata/grdecl_grid.c
+++ b/applications/resdata/grdecl_grid.c
@@ -26,6 +26,8 @@
 #include <resdata/rd_kw_magic.hpp>
 
 int main(int argc, char **argv) {
+    fprintf(stderr, "** Warning: grdecl_grid is deprecated. Use OPM to parse "
+                    "the deck instead\n");
     FILE *stream = util_fopen(argv[1], "r");
     rd_kw_type *gridhead_kw =
         rd_kw_fscanf_alloc_grdecl_dynamic__(stream, SPECGRID_KW, false, RD_INT);
diff --git a/applications/resdata/grdecl_test.c b/applications/resdata/grdecl_test.c
index a7e5a4e81..7e8c0996d 100644
--- a/applications/resdata/grdecl_test.c
+++ b/applications/resdata/grdecl_test.c
@@ -23,6 +23,8 @@
 #include <resdata/rd_kw.hpp>
 
 int main(int argc, char **argv) {
+    fprintf(stderr,
+            "** Warning: grdecl_test.x is deprecated. Use res2df instead\n");
     FILE *stream = util_fopen(argv[1], "r");
     {
         while (true) {
diff --git a/applications/resdata/grid_dump.c b/applications/resdata/grid_dump.c
index 8ceb69d71..e7e2b825a 100644
--- a/applications/resdata/grid_dump.c
+++ b/applications/resdata/grid_dump.c
@@ -24,6 +24,7 @@
 #include <resdata/rd_grid.hpp>
 
 int main(int argc, char **argv) {
+    fprintf(stderr, "** Warning: grid_dump.x is deprecated\n");
     if (argc < 2) {
         fprintf(stderr, "%s: filename \n", argv[0]);
         exit(1);
diff --git a/applications/resdata/grid_dump_ascii.c b/applications/resdata/grid_dump_ascii.c
index 54bcbcba3..a163836e7 100644
--- a/applications/resdata/grid_dump_ascii.c
+++ b/applications/resdata/grid_dump_ascii.c
@@ -24,6 +24,7 @@
 #include <resdata/rd_grid.hpp>
 
 int main(int argc, char **argv) {
+    fprintf(stderr, "** Warning: grid_dump_ascii.x is deprecated\n");
     if (argc < 2) {
         fprintf(stderr, "%s: filename \n", argv[0]);
         exit(1);
diff --git a/applications/resdata/grid_info.c b/applications/resdata/grid_info.c
index 6094803d6..924c9ec4f 100644
--- a/applications/resdata/grid_info.c
+++ b/applications/resdata/grid_info.c
@@ -24,6 +24,9 @@
 #include <resdata/rd_grid.hpp>
 
 int main(int argc, char **argv) {
+    fprintf(
+        stderr,
+        "** Warning: grid_info is deprecated. Use res2df and pandas instead\n");
     if (argc < 2) {
         fprintf(stderr, "%s: filename \n", argv[0]);
         exit(1);
diff --git a/applications/resdata/kw_list.c b/applications/resdata/kw_list.c
index 28305c110..92700b24b 100644
--- a/applications/resdata/kw_list.c
+++ b/applications/resdata/kw_list.c
@@ -51,6 +51,8 @@ void kw_list(const char *filename) {
 }
 
 int main(int argc, char **argv) {
+    fprintf(stderr,
+            "** Warning: kw_list.x deprecated. Use resfo in python instead\n");
     int i;
     for (i = 1; i < argc; i++)
         kw_list(argv[i]);
diff --git a/applications/resdata/load_test.c b/applications/resdata/load_test.c
index 6e04f2468..a550077d6 100644
--- a/applications/resdata/load_test.c
+++ b/applications/resdata/load_test.c
@@ -65,6 +65,7 @@ void test_case(const char *base, bool load_all) {
 }
 
 int main(int argc, char **argv) {
+    fprintf(stderr, "** Warning: load_test is deprecated\n");
     bool load_all = true;
     int i;
     for (i = 1; i < argc; i++)
diff --git a/applications/resdata/make_grid.c b/applications/resdata/make_grid.c
index 0dfb41f79..474a22b64 100644
--- a/applications/resdata/make_grid.c
+++ b/applications/resdata/make_grid.c
@@ -24,6 +24,7 @@
 #include <resdata/rd_grid.hpp>
 
 int main(int argc, char **argv) {
+    fprintf(stderr, "** Warning: make_grid is deprecated. Use python instead");
     if (argc != 5) {
         fprintf(stderr, "%s: basename nx ny nz \n", argv[0]);
         exit(1);
diff --git a/applications/resdata/select_test.c b/applications/resdata/select_test.c
index a4a4e6aa4..84302f69b 100644
--- a/applications/resdata/select_test.c
+++ b/applications/resdata/select_test.c
@@ -25,6 +25,8 @@
 #include <resdata/rd_kw.hpp>
 
 int main(int argc, char **argv) {
+    fprintf(stderr,
+            "** Warning: select_test.x is deprecated. Use res2df instead\n");
     const char *path = argv[1];
     const char *base = argv[2];
     stringlist_type *names = stringlist_alloc_new();
diff --git a/applications/resdata/view_summary.cpp b/applications/resdata/view_summary.cpp
index 5ad7503a0..76ecc821c 100644
--- a/applications/resdata/view_summary.cpp
+++ b/applications/resdata/view_summary.cpp
@@ -133,6 +133,9 @@ static void build_key_list(const rd_sum_type *rd_sum, stringlist_type *key_list,
 }
 
 int main(int argc, char **argv) {
+    fprintf(
+        stderr,
+        "** Warning: summary.x is deprecated. Use res2df summary instead\n");
     install_SIGNALS();
     {
         bool report_only = false;
diff --git a/applications/well/ri_well_test.c b/applications/well/ri_well_test.c
index be38bcd80..190e70237 100644
--- a/applications/well/ri_well_test.c
+++ b/applications/well/ri_well_test.c
@@ -32,6 +32,8 @@ void usage() {
 }
 
 int main(int argc, char **argv) {
+    fprintf(stderr,
+            "** Warning: ri_well_test is deprecated and will be removed\n");
     if (argc < 3)
         usage();
     else {
diff --git a/applications/well/segment_info.c b/applications/well/segment_info.c
index e7251fd5a..a6d4d725b 100644
--- a/applications/well/segment_info.c
+++ b/applications/well/segment_info.c
@@ -34,6 +34,9 @@
 #include <resdata/well/well_segment_collection.hpp>
 
 int main(int argc, char **argv) {
+    fprintf(
+        stderr,
+        "** Warning: segment_info is deprecated. Use res2df rft instead.\n");
     const char *Xfile = argv[1];
     rd_file_type *rst_file = rd_file_open(Xfile, 0);
     rd_rsthead_type *rst_head = rd_rsthead_alloc(
diff --git a/applications/well/well_CF_dump.c b/applications/well/well_CF_dump.c
index d945d773c..6e81bef00 100644
--- a/applications/well/well_CF_dump.c
+++ b/applications/well/well_CF_dump.c
@@ -16,11 +16,14 @@
    for more details.
 */
 
+#include <stdio.h>
 #include <resdata/rd_grid.hpp>
 #include <resdata/well/well_state.hpp>
 #include <resdata/well/well_info.hpp>
 
 int main(int argc, char **argv) {
+    fprintf(stderr,
+            "** Warning: CF_dump is deprecated. Use res2df rft instead\n");
     char *grid_file = argv[1];
     char *rst_file = argv[2];
     rd_grid_type *grid = rd_grid_alloc(grid_file);
diff --git a/setup.py b/setup.py
index f973d9abc..2fbf5ad18 100644
--- a/setup.py
+++ b/setup.py
@@ -34,23 +34,23 @@ def utility_wrappers():
     return [
         name + " = resdata.bin:main"
         for name in (
-            "CF_dump",
-            "convert.x",
+            "CF_dump",  # deprecated
+            "convert.x",  # deprecated
             "rd_pack.x",
             "rd_unpack.x",
-            "grdecl_grid",
-            "grdecl_test.x",
-            "grid_dump.x",
-            "grid_dump_ascii.x",
-            "grid_info.x",
-            "kw_extract",
-            "kw_list.x",
-            "load_test.x",
-            "make_grid",
-            "ri_well_test",
-            "segment_info",
-            "select_test.x",
-            "summary.x",
+            "grdecl_grid",  # deprecated
+            "grdecl_test.x",  # deprecated
+            "grid_dump.x",  # deprecated
+            "grid_dump_ascii.x",  # deprecated
+            "grid_info.x",  # deprecated
+            "kw_extract",  # deprecated
+            "kw_list.x",  # deprecated
+            "load_test.x",  # deprecated
+            "make_grid",  # deprecated
+            "ri_well_test",  # deprecated
+            "segment_info",  # deprecated
+            "select_test.x",  # deprecated
+            "summary.x",  # deprecated
         )
     ]