diff --git a/devtools/Importer.cpp b/devtools/Importer.cpp
index 2b2f8b75..44d5bb35 100644
--- a/devtools/Importer.cpp
+++ b/devtools/Importer.cpp
@@ -3,14 +3,18 @@
 
 int main(int argc, char* argv[])
 {
+    const sfz::InstrumentFormatRegistry& formatRegistry = sfz::InstrumentFormatRegistry::getInstance();
+
     if (argc != 2) {
         std::cerr << "Usage: sfizz_importer <foreign-instrument>\n";
+        std::cerr << "--\n" "Supported formats:\n";
+        for (const sfz::InstrumentFormat* format : formatRegistry.getAllFormats())
+            std::cerr << " * " << format->name() << '\n';
         return 1;
     }
 
     const fs::path foreignPath = fs::u8path(argv[1]);
 
-    const sfz::InstrumentFormatRegistry& formatRegistry = sfz::InstrumentFormatRegistry::getInstance();
     const sfz::InstrumentFormat* format = formatRegistry.getMatchingFormat(foreignPath);
 
     if (!format) {
diff --git a/src/sfizz/import/ForeignInstrument.h b/src/sfizz/import/ForeignInstrument.h
index 94baacf8..cba75b66 100644
--- a/src/sfizz/import/ForeignInstrument.h
+++ b/src/sfizz/import/ForeignInstrument.h
@@ -34,6 +34,11 @@ public:
      */
     const InstrumentFormat* getMatchingFormat(const fs::path& path) const;
 
+    /**
+     * @brief Get the list of registered formats.
+     */
+    const std::vector<const InstrumentFormat*>& getAllFormats() const noexcept { return formats_; }
+
 private:
     std::vector<const InstrumentFormat*> formats_;
 };