diff --git a/.github/workflows/cleanup-prerelease-tags.yml b/.github/workflows/cleanup-prerelease-tags.yml
new file mode 100644
index 00000000..522f04cf
--- /dev/null
+++ b/.github/workflows/cleanup-prerelease-tags.yml
@@ -0,0 +1,55 @@
+name: Preview prerelease tag cleanup
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Resolve version metadata
+        id: version
+        run: |
+          SHOULD_RUN=true
+          VERSION="all-prerelease-tags"
+
+          echo "should_run=$SHOULD_RUN" >> "$GITHUB_OUTPUT"
+          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
+          if [[ "$VERSION" =~ ^v[0-9]+(\.[0-9]+)*$ ]]; then
+            echo "is_prerelease=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "is_prerelease=true" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Preview prerelease releases and tags
+        if: steps.version.outputs.should_run == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          mapfile -t TAGS < <(git tag --list 'v*' | sort -V)
+          MATCHED=0
+
+          for TAG in "${TAGS[@]}"; do
+            if [[ "$TAG" =~ ^v[0-9]+(\.[0-9]+)*$ ]]; then
+              echo "Keep formal release tag: $TAG"
+              continue
+            fi
+
+            if gh release view "$TAG" >/dev/null 2>&1; then
+              echo "Would delete prerelease tag and release: $TAG"
+            else
+              echo "Would delete prerelease tag only: $TAG (no GitHub Release found)"
+            fi
+
+            MATCHED=$((MATCHED + 1))
+          done
+
+          echo "Found $MATCHED prerelease tag(s) that would be deleted."