diff --git a/conversions.go b/conversions.go
index a849df1..2803083 100644
--- a/conversions.go
+++ b/conversions.go
@@ -14,7 +14,7 @@ import (
 // separate the Base64 string from the security signature.
 const SignatureSeparator = "_"
 
-// URLValuesSliceKeySuffix is the character that is used to
+// urlValuesSliceKeySuffix is the character that is used to
 // specify a suffix for slices parsed by URLValues.
 // If the suffix is set to "[i]", then the index of the slice
 // is used in place of i
@@ -29,6 +29,14 @@ const (
 	URLValuesSliceKeySuffixIndex = "[i]"
 )
 
+// URLValuesSliceKeySuffix returns the character that is used to
+// specify a suffix for slices parsed by URLValues.
+//
+// The default suffix is "[]".
+func URLValuesSliceKeySuffix() string {
+	return urlValuesSliceKeySuffix
+}
+
 // SetURLValuesSliceKeySuffix sets the character that is used to
 // specify a suffix for slices parsed by URLValues.
 // If the suffix is set to "[i]", then the index of the slice
@@ -110,12 +118,25 @@ func cleanUpMapArray(in []Map) []Map {
 	return result
 }
 
+func cleanUpInterfaceMapArray(in []map[any]any) []Map {
+	if in == nil {
+		return nil
+	}
+	result := make([]Map, len(in))
+	for i, v := range in {
+		result[i] = cleanUpInterfaceMap(v)
+	}
+	return result
+}
+
 func cleanUp(v any) any {
 	switch v := v.(type) {
 	case []any:
 		return cleanUpInterfaceArray(v)
 	case []map[string]any:
 		return cleanUpMSIArray(v)
+	case []map[any]any:
+		return cleanUpInterfaceMapArray(v)
 	case map[any]any:
 		return cleanUpInterfaceMap(v)
 	case map[string]any:
diff --git a/conversions_nil_test.go b/conversions_nil_test.go
index 415b4fd..df660f6 100644
--- a/conversions_nil_test.go
+++ b/conversions_nil_test.go
@@ -16,6 +16,7 @@ func TestConversionJSONPreservesNilContainers(t *testing.T) {
 		{"nil interface slice", []any(nil), "null"},
 		{"nil map slice", []objx.Map(nil), "null"},
 		{"nil string map slice", []map[string]any(nil), "null"},
+		{"nil interface map slice", []map[any]any(nil), "null"},
 		{"nil map", objx.Map(nil), "null"},
 		{"nil interface map", map[any]any(nil), "null"},
 		{"nil string map", map[string]any(nil), "null"},
@@ -24,11 +25,13 @@ func TestConversionJSONPreservesNilContainers(t *testing.T) {
 		{"empty interface slice", []any{}, "[]"},
 		{"empty map slice", []objx.Map{}, "[]"},
 		{"empty string map slice", []map[string]any{}, "[]"},
+		{"empty interface map slice", []map[any]any{}, "[]"},
 		{"empty map", objx.Map{}, "{}"},
 		{"empty interface map", map[any]any{}, "{}"},
 		{"populated interface slice", []any{1}, "[1]"},
 		{"populated map slice", []objx.Map{{"key": "value"}}, `[{"key":"value"}]`},
 		{"populated string map slice", []map[string]any{{"key": "value"}}, `[{"key":"value"}]`},
+		{"populated interface map slice", []map[any]any{{"key": "value"}}, `[{"key":"value"}]`},
 		{"populated map", objx.Map{"key": "value"}, `{"key":"value"}`},
 		{"populated interface map", map[any]any{1: "value"}, `{"1":"value"}`},
 	}
diff --git a/conversions_test.go b/conversions_test.go
index 950e912..21fecab 100644
--- a/conversions_test.go
+++ b/conversions_test.go
@@ -23,10 +23,11 @@ func TestConversionJSON(t *testing.T) {
 			"f": []objx.Map{{"g": map[any]any{"h": "i"}}},
 			"j": []map[string]any{{"k": map[any]any{"l": "m"}}},
 			"n": []any{objx.Map{"o": "p"}},
+			"q": []map[any]any{{"r": map[any]any{"s": "t"}}},
 		},
 	}
 
-	jsonString = `{"a":{"b":{"c":{"d":"e"}},"f":[{"g":{"h":"i"}}],"j":[{"k":{"l":"m"}}],"n":[{"o":"p"}]}}`
+	jsonString = `{"a":{"b":{"c":{"d":"e"}},"f":[{"g":{"h":"i"}}],"j":[{"k":{"l":"m"}}],"n":[{"o":"p"}],"q":[{"r":{"s":"t"}}]}}`
 	result, err = i.JSON()
 	require.NoError(t, err)
 	assert.Equal(t, jsonString, result)
@@ -272,15 +273,25 @@ func TestConversionURLValuesNested(t *testing.T) {
 }
 
 func TestValidityURLQuerySliceKeySuffix(t *testing.T) {
-	t.Cleanup(func() { _ = objx.SetURLValuesSliceKeySuffix(objx.URLValuesSliceKeySuffixArray) })
+	orig := objx.URLValuesSliceKeySuffix()
+	assert.Equal(t, objx.URLValuesSliceKeySuffixArray, orig)
+	t.Cleanup(func() { _ = objx.SetURLValuesSliceKeySuffix(orig) })
+
 	err := objx.SetURLValuesSliceKeySuffix("")
 	assert.Nil(t, err)
+	assert.Equal(t, objx.URLValuesSliceKeySuffixEmpty, objx.URLValuesSliceKeySuffix())
+
 	err = objx.SetURLValuesSliceKeySuffix("[]")
 	assert.Nil(t, err)
+	assert.Equal(t, objx.URLValuesSliceKeySuffixArray, objx.URLValuesSliceKeySuffix())
+
 	err = objx.SetURLValuesSliceKeySuffix("[i]")
 	assert.Nil(t, err)
+	assert.Equal(t, objx.URLValuesSliceKeySuffixIndex, objx.URLValuesSliceKeySuffix())
+
 	err = objx.SetURLValuesSliceKeySuffix("{}")
 	assert.Error(t, err)
+	assert.Equal(t, objx.URLValuesSliceKeySuffixIndex, objx.URLValuesSliceKeySuffix())
 }
 
 func getURLQueryMap() objx.Map {