diff --git a/docs/static/swagger-versions/v1.75.0.json b/docs/static/swagger-versions/v1.75.0.json
index 49b66a4d..6ca23277 100644
--- a/docs/static/swagger-versions/v1.75.0.json
+++ b/docs/static/swagger-versions/v1.75.0.json
@@ -4786,6 +4786,12 @@
                         "$ref": "#/definitions/convert.Note"
                     }
                 },
+                "plan": {
+                    "type": "array",
+                    "items": {
+                        "$ref": "#/definitions/convert.SetPlan"
+                    }
+                },
                 "sets": {
                     "type": "array",
                     "items": {
@@ -4821,6 +4827,47 @@
                 }
             }
         },
+        "convert.SetPlan": {
+            "type": "object",
+            "properties": {
+                "accepts_targets": {
+                    "type": "boolean"
+                },
+                "domains": {
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    }
+                },
+                "enabled": {
+                    "type": "boolean"
+                },
+                "faking": {
+                    "type": "boolean"
+                },
+                "fallback_for": {
+                    "type": "integer"
+                },
+                "ips": {
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    }
+                },
+                "name": {
+                    "type": "string"
+                },
+                "profile": {
+                    "type": "integer"
+                },
+                "role": {
+                    "type": "string"
+                },
+                "strategy": {
+                    "type": "string"
+                }
+            }
+        },
         "convert.Status": {
             "type": "string",
             "enum": [
@@ -6080,6 +6127,15 @@
                 "name_prefix": {
                     "type": "string"
                 },
+                "profile_domains": {
+                    "type": "object",
+                    "additionalProperties": {
+                        "type": "array",
+                        "items": {
+                            "type": "string"
+                        }
+                    }
+                },
                 "text": {
                     "type": "string"
                 },
diff --git a/docs/static/swagger.json b/docs/static/swagger.json
index 49b66a4d..6ca23277 100644
--- a/docs/static/swagger.json
+++ b/docs/static/swagger.json
@@ -4786,6 +4786,12 @@
                         "$ref": "#/definitions/convert.Note"
                     }
                 },
+                "plan": {
+                    "type": "array",
+                    "items": {
+                        "$ref": "#/definitions/convert.SetPlan"
+                    }
+                },
                 "sets": {
                     "type": "array",
                     "items": {
@@ -4821,6 +4827,47 @@
                 }
             }
         },
+        "convert.SetPlan": {
+            "type": "object",
+            "properties": {
+                "accepts_targets": {
+                    "type": "boolean"
+                },
+                "domains": {
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    }
+                },
+                "enabled": {
+                    "type": "boolean"
+                },
+                "faking": {
+                    "type": "boolean"
+                },
+                "fallback_for": {
+                    "type": "integer"
+                },
+                "ips": {
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    }
+                },
+                "name": {
+                    "type": "string"
+                },
+                "profile": {
+                    "type": "integer"
+                },
+                "role": {
+                    "type": "string"
+                },
+                "strategy": {
+                    "type": "string"
+                }
+            }
+        },
         "convert.Status": {
             "type": "string",
             "enum": [
@@ -6080,6 +6127,15 @@
                 "name_prefix": {
                     "type": "string"
                 },
+                "profile_domains": {
+                    "type": "object",
+                    "additionalProperties": {
+                        "type": "array",
+                        "items": {
+                            "type": "string"
+                        }
+                    }
+                },
                 "text": {
                     "type": "string"
                 },
diff --git a/src/http/handler/convert.go b/src/http/handler/convert.go
index 9f1b5777..d5232365 100644
--- a/src/http/handler/convert.go
+++ b/src/http/handler/convert.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"net/http"
 	"strconv"
+	"strings"
 
 	"github.com/daniellavrushin/b4/config"
 	"github.com/daniellavrushin/b4/convert"
@@ -171,13 +172,29 @@ func (api *API) runConvert(req convertRequest) (*convert.Result, error) {
 		case errors.Is(err, convert.ErrNothingToParse):
 			return nil, ErrBadRequest("No recognizable options were found in the supplied text")
 		case errors.Is(err, convert.ErrUnsupportedTool):
-			return nil, ErrBadRequest("These options belong to a tool b4 cannot convert yet. Only byedpi command lines are supported so far")
+			return nil, ErrBadRequest("These options belong to a tool b4 cannot convert yet. Supported: " +
+				supportedToolList())
 		}
 		return nil, ErrBadRequest(err.Error())
 	}
 	return res, nil
 }
 
+func supportedToolList() string {
+	tools, err := convert.Tools()
+	if err != nil {
+		return "none"
+	}
+	names := make([]string, 0, len(tools))
+	for _, t := range tools {
+		names = append(names, t.Label)
+	}
+	if len(names) == 0 {
+		return "none"
+	}
+	return strings.Join(names, ", ")
+}
+
 func assignSetIDs(sets []config.SetConfig) []*config.SetConfig {
 	ids := make(map[string]string, len(sets))
 	out := make([]*config.SetConfig, 0, len(sets))
diff --git a/src/http/handler/convert_test.go b/src/http/handler/convert_test.go
index 7dd7af19..53f114f6 100644
--- a/src/http/handler/convert_test.go
+++ b/src/http/handler/convert_test.go
@@ -143,6 +143,41 @@ func TestAssignSetIDs_DropsDanglingEscalation(t *testing.T) {
 	}
 }
 
+func TestSupportedToolList_NamesEveryRegisteredTool(t *testing.T) {
+	tools, err := convert.Tools()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(tools) == 0 {
+		t.Fatal("no tools registered")
+	}
+	list := supportedToolList()
+	for _, x := range tools {
+		if !strings.Contains(list, x.Label) {
+			t.Errorf("%q is a supported tool but the message does not name it: %q", x.Label, list)
+		}
+	}
+}
+
+func TestHandleConvertAnalyze_UnsupportedToolNamesWhatIsSupported(t *testing.T) {
+	mux := convertAPI(t)
+	rec := postConvert(t, mux, "/api/convert/analyze",
+		`{"text":"--dpi-desync=fake --tlsrec=1 --mod-http=h"}`)
+
+	if rec.Code != http.StatusBadRequest {
+		t.Fatalf("got %d (%s), want 400", rec.Code, rec.Body.String())
+	}
+	tools, err := convert.Tools()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, x := range tools {
+		if !strings.Contains(rec.Body.String(), x.Label) {
+			t.Errorf("error body does not name %q: %s", x.Label, rec.Body.String())
+		}
+	}
+}
+
 func TestNormalizeDomains(t *testing.T) {
 	got := normalizeDomains([]string{" YouTube.com ", "https://youtube.com/watch", "", "vk.com:443"})
 	want := []string{"youtube.com", "vk.com"}