diff --git a/src/plugins/qmldesigner/components/assetslibrary/assetslibrarymodel.cpp b/src/plugins/qmldesigner/components/assetslibrary/assetslibrarymodel.cpp
index 09ec468905d..d3a701aa5f2 100644
--- a/src/plugins/qmldesigner/components/assetslibrary/assetslibrarymodel.cpp
+++ b/src/plugins/qmldesigner/components/assetslibrary/assetslibrarymodel.cpp
@@ -154,20 +154,15 @@ bool AssetsLibraryModel::renameFolder(const QString &folderPath, const QString &
 
 QString AssetsLibraryModel::addNewFolder(const QString &folderPath)
 {
-    Utils::FilePath dir = Utils::FilePath::fromString(folderPath);
-    Utils::FilePath parentDir = dir.parentDir();
+    Utils::FilePath uniqueDirPath = Utils::FilePath::fromString(UniqueName::getPath(folderPath));
 
-    QString uniqueFolderName = UniqueName::get(dir.fileName(), [&] (const QString &folderName) {
-        return !parentDir.pathAppended(folderName).exists();
-    });
-
-    auto res = parentDir.pathAppended(uniqueFolderName).ensureWritableDir();
+    auto res = uniqueDirPath.ensureWritableDir();
     if (!res.has_value()) {
         qWarning() << __FUNCTION__ << res.error();
         return {};
     }
 
-    return uniqueFolderName;
+    return uniqueDirPath.path();
 }
 
 bool AssetsLibraryModel::urlPathExistsInModel(const QUrl &url) const
diff --git a/src/plugins/qmldesigner/components/assetslibrary/assetslibrarywidget.cpp b/src/plugins/qmldesigner/components/assetslibrary/assetslibrarywidget.cpp
index 9c46ace22d0..0324abe32e0 100644
--- a/src/plugins/qmldesigner/components/assetslibrary/assetslibrarywidget.cpp
+++ b/src/plugins/qmldesigner/components/assetslibrary/assetslibrarywidget.cpp
@@ -176,13 +176,9 @@ void AssetsLibraryWidget::deleteSelectedAssets()
 QString AssetsLibraryWidget::getUniqueEffectPath(const QString &parentFolder, const QString &effectName)
 {
     QString effectsDir = ModelNodeOperations::getEffectsDefaultDirectory(parentFolder);
-    QString effectPathTemplate = effectsDir + QLatin1String("/%1.qep");
+    QString effectPath = QLatin1String("%1/%2.qep").arg(effectsDir, effectName);
 
-    QString uniqueName = UniqueName::get(effectName, [&] (const QString &name) {
-        return !QFile::exists(effectPathTemplate.arg(name));
-    });
-
-    return effectPathTemplate.arg(uniqueName);
+    return UniqueName::getPath(effectPath);
 }
 
 bool AssetsLibraryWidget::createNewEffect(const QString &effectPath, bool openInEffectComposer)
diff --git a/src/plugins/qmldesigner/utils/uniquename.cpp b/src/plugins/qmldesigner/utils/uniquename.cpp
index ef6d3d8e5e2..e77814c97cf 100644
--- a/src/plugins/qmldesigner/utils/uniquename.cpp
+++ b/src/plugins/qmldesigner/utils/uniquename.cpp
@@ -3,17 +3,22 @@
 
 #include "uniquename.h"
 
+#include <QFileInfo>
 #include <QRegularExpression>
 
 namespace QmlDesigner {
 
 /**
- * @brief Gets a unique name from a give name
- * @param oldName input name
- * @param predicate function to check if the name is unique. Retuns true if name is unique
- * @return a unique name
+ * @brief Generates a unique name based on the provided name.
+ *
+ * This method iteratively generates a name by appending suffixes until a unique name is found.
+ * The uniqueness of the generated name is determined by the provided predicate function.
+ *
+ * @param oldName The original name to be made unique.
+ * @param predicate A function that checks if a name is unique. Returns true if the name is unique,
+ *        false otherwise.
+ * @return A unique name derived from the provided name.
  */
-// static
 QString UniqueName::get(const QString &oldName, std::function<bool(const QString &)> predicate)
 {
     QString newName = oldName;
@@ -23,29 +28,59 @@ QString UniqueName::get(const QString &oldName, std::function<bool(const QString
     return newName;
 }
 
-// static
+/**
+ * @brief Generates a unique path based on the provided path. If the path belongs to a file, the
+ * filename or if it's a directory, the directory name will be adjusted to ensure uniqueness.
+ *
+ * This method appends a numerical suffix (or increment it if it exists) to the filename or
+ * directory name if necessary to make it unique.
+ *
+ * @param path The original path to be made unique.
+ * @return A unique path derived from the provided path.
+ */
+QString UniqueName::getPath(const QString &path)
+{
+    // Remove the trailing slash if it exists (otherwise QFileInfo::path() returns empty)
+    QString adjustedPath = path;
+    if (adjustedPath.endsWith('/'))
+        adjustedPath.chop(1);
+
+    QFileInfo fileInfo = QFileInfo(adjustedPath);
+    QString baseName = fileInfo.baseName();
+    QString suffix = fileInfo.completeSuffix();
+    if (!suffix.isEmpty())
+        suffix.prepend('.');
+
+    QString parentDir = fileInfo.path();
+    QString pathTemplate = parentDir + "/%1" + suffix;
+
+    QString uniqueBaseName = UniqueName::get(baseName, [&] (const QString &currName) {
+        return !QFileInfo::exists(pathTemplate.arg(currName));
+    });
+
+    return pathTemplate.arg(uniqueBaseName);
+}
+
 QString UniqueName::nextName(const QString &oldName)
 {
-    static QRegularExpression rgx("\\d+$"); // matches a number at the end of a string
+    static QRegularExpression rgx("\\d+$"); // match a number at the end of a string
 
     QString uniqueName = oldName;
     // if the name ends with a number, increment it
     QRegularExpressionMatch match = rgx.match(uniqueName);
     if (match.hasMatch()) { // ends with a number
         QString numStr = match.captured(0);
-        int num = match.captured(0).toInt();
+        int num = numStr.toInt() + 1;
 
         // get number of padding zeros, ex: for "005" = 2
         int nPaddingZeros = 0;
         for (; nPaddingZeros < numStr.size() && numStr[nPaddingZeros] == '0'; ++nPaddingZeros);
 
-        ++num;
-
         // if the incremented number's digits increased, decrease the padding zeros
         if (std::fmod(std::log10(num), 1.0) == 0)
             --nPaddingZeros;
 
-        uniqueName = oldName.mid(0, match.capturedStart())
+        uniqueName = oldName.left(match.capturedStart())
                      + QString('0').repeated(nPaddingZeros)
                      + QString::number(num);
     } else {
diff --git a/src/plugins/qmldesigner/utils/uniquename.h b/src/plugins/qmldesigner/utils/uniquename.h
index 51e21bf17ad..9c6765d1aee 100644
--- a/src/plugins/qmldesigner/utils/uniquename.h
+++ b/src/plugins/qmldesigner/utils/uniquename.h
@@ -11,6 +11,7 @@ class UniqueName
 {
 public:
     static QString get(const QString &oldName, std::function<bool(const QString &)> predicate);
+    static QString getPath(const QString &oldName);
 
 private:
     static QString nextName(const QString &oldName);