diff --git a/check-linuxcnc-switchkins-remap-table.sh b/check-linuxcnc-switchkins-remap-table.sh
index f0540ed..a08bc3d 100755
--- a/check-linuxcnc-switchkins-remap-table.sh
+++ b/check-linuxcnc-switchkins-remap-table.sh
@@ -8,10 +8,14 @@ manifest=${1:-linuxcnc-kinematics-source-files.txt}
 
 generated_table=$(mktemp "${TMPDIR:-/tmp}/linuxcnc_switchkins_remap_table.XXXXXX.inc")
 generated_cases=$(mktemp "${TMPDIR:-/tmp}/linuxcnc_switchkins_remap_config_cases.XXXXXX.inc")
-trap 'rm -f "$generated_table" "$generated_cases"' EXIT
+generated_json_cases=$(mktemp "${TMPDIR:-/tmp}/linuxcnc_switchkins_remap_config_cases.XXXXXX.json")
+trap 'rm -f "$generated_table" "$generated_cases" "$generated_json_cases"' EXIT
 
 LINUXCNC_ROOT="$linuxcnc_root" ./generate-linuxcnc-switchkins-remap-table.sh "$manifest" > "$generated_table"
 diff -u core/src/linuxcnc_switchkins_remap_table.inc "$generated_table"
 
 LINUXCNC_ROOT="$linuxcnc_root" ./generate-linuxcnc-switchkins-remap-table.sh --config-cases "$manifest" > "$generated_cases"
 diff -u core/tests/linuxcnc_switchkins_remap_config_cases.inc "$generated_cases"
+
+LINUXCNC_ROOT="$linuxcnc_root" ./generate-linuxcnc-switchkins-remap-table.sh --json-cases "$manifest" > "$generated_json_cases"
+diff -u web/public/linuxcnc_switchkins_remap_config_cases.json "$generated_json_cases"
diff --git a/generate-linuxcnc-switchkins-remap-table.sh b/generate-linuxcnc-switchkins-remap-table.sh
index a35ac73..9f4bb48 100755
--- a/generate-linuxcnc-switchkins-remap-table.sh
+++ b/generate-linuxcnc-switchkins-remap-table.sh
@@ -8,6 +8,9 @@ mode=table
 if [[ "${1:-}" == "--config-cases" ]]; then
     mode=config-cases
     shift
+elif [[ "${1:-}" == "--json-cases" ]]; then
+    mode=json-cases
+    shift
 fi
 manifest=${1:-linuxcnc-kinematics-source-files.txt}
 
@@ -131,6 +134,7 @@ declare -A seen_aliases=()
 declare -A seen_cases=()
 entries=()
 case_entries=()
+json_case_entries=()
 
 add_alias() {
     local alias=$1
@@ -166,9 +170,12 @@ add_case() {
     [[ -z "${seen_cases[$key]:-}" ]] || return 0
 
     seen_cases[$key]=1
-    field=$(cpp_string "$field")
-    value=$(cpp_string "$value")
-    case_entries+=("            {\"$field\", \"$value\", $m428, $m429, $m430},")
+    local cpp_field
+    local cpp_value
+    cpp_field=$(cpp_string "$field")
+    cpp_value=$(cpp_string "$value")
+    case_entries+=("            {\"$cpp_field\", \"$cpp_value\", $m428, $m429, $m430},")
+    json_case_entries+=("{\"field\":\"$cpp_field\",\"value\":\"$cpp_value\",\"m428\":$m428,\"m429\":$m429,\"m430\":$m430}")
 }
 
 add_machine_aliases() {
@@ -298,6 +305,16 @@ elif [[ "$mode" == config-cases ]]; then
 EOF
 
     printf '%s\n' "${case_entries[@]}"
+elif [[ "$mode" == json-cases ]]; then
+    printf '[\n'
+    for i in "${!json_case_entries[@]}"; do
+        suffix=,
+        if [[ "$i" == "$((${#json_case_entries[@]} - 1))" ]]; then
+            suffix=
+        fi
+        printf '  %s%s\n' "${json_case_entries[$i]}" "$suffix"
+    done
+    printf ']\n'
 else
     echo "unknown switchkins remap table generator mode: $mode" >&2
     exit 1
diff --git a/web/public/linuxcnc_switchkins_remap_config_cases.json b/web/public/linuxcnc_switchkins_remap_config_cases.json
new file mode 100644
index 0000000..0d2c67f
--- /dev/null
+++ b/web/public/linuxcnc_switchkins_remap_config_cases.json
@@ -0,0 +1,66 @@
+[
+  {"field":"config","value":"configs/sim/axis/vismach/5axis/bridgemill/5axis.ini","m428":0,"m429":1,"m430":2},
+  {"field":"machine","value":"Sim-5Axis Bridge Mill (xyzbcw)","m428":0,"m429":1,"m430":2},
+  {"field":"kinematics","value":"5axiskins coordinates=xyzbcwy","m428":0,"m429":1,"m430":2},
+  {"field":"halfile","value":"5axisgui.hal","m428":0,"m429":1,"m430":2},
+  {"field":"halfile","value":"5axisgui","m428":0,"m429":1,"m430":2},
+  {"field":"hal_file","value":"5axisgui.hal","m428":0,"m429":1,"m430":2},
+  {"field":"hal_file","value":"5axisgui","m428":0,"m429":1,"m430":2},
+  {"field":"config","value":"configs/sim/axis/vismach/5axis/table-dual-rotary/xyzab-tdr.ini","m428":1,"m429":0,"m430":-1},
+  {"field":"machine","value":"sim-xyzab-tdr-kins (switchkins)","m428":1,"m429":0,"m430":-1},
+  {"field":"kinematics","value":"xyzab_tdr_kins","m428":1,"m429":0,"m430":-1},
+  {"field":"config","value":"configs/sim/axis/vismach/5axis/table-rotary-tilting/xyzac-trt.ini","m428":1,"m429":0,"m430":2},
+  {"field":"machine","value":"sim-xyzac-trt-kins (switchkins)","m428":1,"m429":0,"m430":2},
+  {"field":"kinematics","value":"xyzac-trt-kins sparm=identityfirst","m428":1,"m429":0,"m430":2},
+  {"field":"config","value":"configs/sim/axis/vismach/5axis/table-rotary-tilting/xyzbc-trt.ini","m428":1,"m429":0,"m430":2},
+  {"field":"machine","value":"sim-xyzbc-trt-kins (switchkins)","m428":1,"m429":0,"m430":2},
+  {"field":"kinematics","value":"xyzbc-trt-kins sparm=identityfirst","m428":1,"m429":0,"m430":2},
+  {"field":"config","value":"configs/sim/axis/vismach/5axis/table-rotary_spindle-rotary-nutating/xyzacb-trsrn_twp/xyzacb-trsrn.ini","m428":0,"m429":1,"m430":2},
+  {"field":"machine","value":"xyzacb-trsrn (switchkins)","m428":0,"m429":1,"m430":2},
+  {"field":"kinematics","value":"xyzacb_trsrn","m428":0,"m429":1,"m430":2},
+  {"field":"config","value":"configs/sim/axis/vismach/5axis/table-rotary_spindle-rotary-nutating/xyzbca-trsrn_twp/xyzbca-trsrn.ini","m428":0,"m429":1,"m430":2},
+  {"field":"machine","value":"xyzbca-trsrn (switchkins)","m428":0,"m429":1,"m430":2},
+  {"field":"kinematics","value":"xyzbca_trsrn","m428":0,"m429":1,"m430":2},
+  {"field":"config","value":"configs/sim/axis/vismach/hexapod-sim/hexapod.ini","m428":0,"m429":1,"m430":2},
+  {"field":"machine","value":"hexapod (switchkins)","m428":0,"m429":1,"m430":2},
+  {"field":"kinematics","value":"genhexkins","m428":0,"m429":1,"m430":2},
+  {"field":"halfile","value":"kinematics.hal","m428":0,"m429":1,"m430":2},
+  {"field":"halfile","value":"kinematics","m428":0,"m429":1,"m430":2},
+  {"field":"hal_file","value":"kinematics.hal","m428":0,"m429":1,"m430":2},
+  {"field":"hal_file","value":"kinematics","m428":0,"m429":1,"m430":2},
+  {"field":"config","value":"configs/sim/axis/vismach/melfa-sim/melfa.ini","m428":0,"m429":1,"m430":2},
+  {"field":"machine","value":"melfa (mm)","m428":0,"m429":1,"m430":2},
+  {"field":"kinematics","value":"genserkins","m428":0,"m429":1,"m430":2},
+  {"field":"halfile","value":"melfa_dh.hal","m428":0,"m429":1,"m430":2},
+  {"field":"halfile","value":"melfa_dh","m428":0,"m429":1,"m430":2},
+  {"field":"hal_file","value":"melfa_dh.hal","m428":0,"m429":1,"m430":2},
+  {"field":"hal_file","value":"melfa_dh","m428":0,"m429":1,"m430":2},
+  {"field":"config","value":"configs/sim/axis/vismach/millturn/millturn.ini","m428":0,"m429":1,"m430":-1},
+  {"field":"machine","value":"millturn (mm)","m428":0,"m429":1,"m430":-1},
+  {"field":"kinematics","value":"millturn","m428":0,"m429":1,"m430":-1},
+  {"field":"halfile","value":"millturn.hal","m428":0,"m429":1,"m430":-1},
+  {"field":"halfile","value":"millturn","m428":0,"m429":1,"m430":-1},
+  {"field":"hal_file","value":"millturn.hal","m428":0,"m429":1,"m430":-1},
+  {"field":"hal_file","value":"millturn","m428":0,"m429":1,"m430":-1},
+  {"field":"config","value":"configs/sim/axis/vismach/puma/puma.ini","m428":0,"m429":1,"m430":2},
+  {"field":"machine","value":"PUMA (pumakins,switchkins)","m428":0,"m429":1,"m430":2},
+  {"field":"kinematics","value":"pumakins","m428":0,"m429":1,"m430":2},
+  {"field":"halfile","value":"puma_dh.hal","m428":0,"m429":1,"m430":2},
+  {"field":"halfile","value":"puma_dh","m428":0,"m429":1,"m430":2},
+  {"field":"hal_file","value":"puma_dh.hal","m428":0,"m429":1,"m430":2},
+  {"field":"hal_file","value":"puma_dh","m428":0,"m429":1,"m430":2},
+  {"field":"config","value":"configs/sim/axis/vismach/puma/puma_cube.ini","m428":0,"m429":1,"m430":2},
+  {"field":"machine","value":"puma_cube.ini (pumakins)","m428":0,"m429":1,"m430":2},
+  {"field":"config","value":"configs/sim/axis/vismach/puma/puma560.ini","m428":0,"m429":1,"m430":2},
+  {"field":"machine","value":"puma560 (switchkins) (inch)","m428":0,"m429":1,"m430":2},
+  {"field":"halfile","value":"puma560_dh.hal","m428":0,"m429":1,"m430":2},
+  {"field":"halfile","value":"puma560_dh","m428":0,"m429":1,"m430":2},
+  {"field":"hal_file","value":"puma560_dh.hal","m428":0,"m429":1,"m430":2},
+  {"field":"hal_file","value":"puma560_dh","m428":0,"m429":1,"m430":2},
+  {"field":"config","value":"configs/sim/axis/vismach/puma/puma560_uvw.ini","m428":0,"m429":1,"m430":2},
+  {"field":"config","value":"configs/sim/axis/vismach/scara/scara.ini","m428":0,"m429":1,"m430":2},
+  {"field":"machine","value":"SCARA (genserkins,switchkins)","m428":0,"m429":1,"m430":2},
+  {"field":"kinematics","value":"scarakins coordinates=xyzcab","m428":0,"m429":1,"m430":2},
+  {"field":"config","value":"configs/sim/qtaxis/non-trivial/scara/scara.ini","m428":0,"m429":1,"m430":2},
+  {"field":"config","value":"configs/sim/qtvcp_screens/non-trivial/scara/scara.ini","m428":0,"m429":1,"m430":2}
+]
diff --git a/web/src/index.ts b/web/src/index.ts
index e52ad17..385ff54 100644
--- a/web/src/index.ts
+++ b/web/src/index.ts
@@ -80,6 +80,12 @@ export type CncParseOptions = {
   block_delete?: boolean;
   switchkins?: string;
   remap?: string;
+  machine?: string;
+  config?: string;
+  configPath?: string;
+  config_path?: string;
+  halfile?: string;
+  hal_file?: string;
   kinematics?: string;
   trt?: "xyzbc" | "xyzac" | string;
   pivotLength?: number;
diff --git a/web/src/wasm-core.js b/web/src/wasm-core.js
index 92705c1..34f71ef 100644
--- a/web/src/wasm-core.js
+++ b/web/src/wasm-core.js
@@ -113,6 +113,12 @@ export async function createWasmSimulator(moduleOptions = {}) {
         ...(options.block_delete !== undefined ? { block_delete: options.block_delete } : {}),
         ...(options.switchkins ? { switchkins: options.switchkins } : {}),
         ...(options.remap ? { remap: options.remap } : {}),
+        ...(options.machine ? { machine: options.machine } : {}),
+        ...(options.config ? { config: options.config } : {}),
+        ...(options.configPath ? { configPath: options.configPath } : {}),
+        ...(options.config_path ? { config_path: options.config_path } : {}),
+        ...(options.halfile ? { halfile: options.halfile } : {}),
+        ...(options.hal_file ? { hal_file: options.hal_file } : {}),
         ...(options.kinematics ? { kinematics: options.kinematics } : {}),
         ...(options.trt ? { trt: options.trt } : {}),
         ...(options.pivotLength !== undefined ? { pivotLength: options.pivotLength } : {}),
diff --git a/web/test-browser-wasm-smoke.html b/web/test-browser-wasm-smoke.html
index f873cfb..06ef536 100644
--- a/web/test-browser-wasm-smoke.html
+++ b/web/test-browser-wasm-smoke.html
@@ -44,6 +44,37 @@
               throw new Error(`missing LinuxCNC WASM browser M${427 + line} switchkins type ${kinstype}`);
             }
           }
+
+          const configCaseResponse = await fetch("/public/linuxcnc_switchkins_remap_config_cases.json");
+          if (!configCaseResponse.ok) {
+            throw new Error(`failed to load LinuxCNC switchkins config cases: ${configCaseResponse.status}`);
+          }
+          const configCases = await configCaseResponse.json();
+          if (!Array.isArray(configCases) || configCases.length === 0) {
+            throw new Error("missing LinuxCNC switchkins config cases");
+          }
+          for (const configCase of configCases) {
+            const options = {
+              backend: "linuxcnc-rs274",
+              [configCase.field]: configCase.value,
+            };
+            const program = configCase.m430 >= 0 ? "M428\nM429\nM430\n" : "M428\nM429\n";
+            const configEvents = simulator.parse(program, "linuxcnc", options);
+            for (const [line, kinstype] of [
+              [1, configCase.m428],
+              [2, configCase.m429],
+              ...(configCase.m430 >= 0 ? [[3, configCase.m430]] : []),
+            ]) {
+              const sawSwitch = configEvents.some(
+                (event) => event.type === "kinematics-switch" && event.line === line && event.reserved === kinstype,
+              );
+              if (!sawSwitch) {
+                throw new Error(
+                  `missing LinuxCNC WASM browser generated ${configCase.field}=${configCase.value} line ${line} switchkins type ${kinstype}`,
+                );
+              }
+            }
+          }
           result.textContent = "browser wasm smoke passed";
         } finally {
           simulator.dispose();