diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c22eeeef..3f7c9d22 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,3 +33,46 @@ jobs:
 
       - name: Run e2e tests
         run: npm run e2e
+
+  build-artifact:
+    needs: tests_e2e
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 24.x
+          cache: npm
+
+      - name: update
+        run: sudo apt update -y
+
+      - name: apt install
+        run: sudo apt-get install -y git jq
+
+      - name: build
+        run: |
+          npm install
+          npm run release
+
+      - name: Get short SHA
+        id: short_sha
+        run: |
+            if [ "${{ github.event_name }}" == "pull_request" ]; then
+                echo "SHORT_SHA=$(echo ${{ github.event.pull_request.head.sha }} | cut -c1-7)" >> $GITHUB_ENV
+            else
+                echo "SHORT_SHA=$(echo ${{ github.sha }} | cut -c1-7)" >> $GITHUB_ENV
+            fi
+
+      - name: Get Zonemaster-GUI version
+        id: version
+        run: |
+          VERSION=`jq -r '.version | sub("^v"; "")' package.json`
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+
+      - name: upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: zonemaster_web_gui_v${{ steps.version.outputs.version }}-${{ env.SHORT_SHA }}
+          path: zonemaster_web_gui_v${{ steps.version.outputs.version }}.zip
diff --git a/README.md b/README.md
index 620541fb..85c5cee9 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,16 @@ Refer to the [docs](/docs) directory for detailed information on:
 
 For contribution guidelines, see [CONTRIBUTE.md](CONTRIBUTE.md).
 
+## CI artifact
+
+A zip (`zonemaster_web_gui_<version>.zip`) is built and uploaded as a GitHub Actions artifact on every push and pull request. This artifact can be useful for release testing and PR review.
+To download it:
+1. Go to the [Actions tab](https://github.com/zonemaster/zonemaster-gui/actions) of the repository.
+2. Select a workflow run (e.g. for a specific PR or branch).
+3. Scroll to the bottom of the run summary to the **Artifacts** section.
+4. Download the artifact named `zonemaster_web_gui_<version>-<short_sha>`.
+The artifact name includes the module version and the first 7 characters of the commit SHA.
+
 ## License
 
 This is free software under a 2-clause BSD license. The full text of the license can be found in the [LICENSE](LICENSE) file included in this repository.