diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..c95923f
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,20 @@
+# https://EditorConfig.org
+
+root = true
+
+[*]
+indent_size = 4
+indent_style = space
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[{*.go,go.mod,Makefile}]
+indent_style = unset
+
+[{*.{yaml,yml},PROJECT}]
+indent_size = 2
+
+[{*.md,LICENSE}]
+indent_size = unset
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 617a0d1..1c6955f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -62,4 +62,5 @@ jobs:
       - name: Check if 'make manifests' was run
         run: make check-manifests
 
-    # TODO editorconfig
+      - name: Check all files format
+        run: make ec
diff --git a/Makefile b/Makefile
index ce7b4e0..356b022 100644
--- a/Makefile
+++ b/Makefile
@@ -204,8 +204,23 @@ endef
 
 ##@ oadp-nac specifics
 
+EC ?= $(LOCALBIN)/ec-$(EC_VERSION)
+EC_VERSION ?= 2.8.0
+
+.PHONY: editorconfig
+editorconfig: $(LOCALBIN) ## Download editorconfig locally if necessary.
+	@[ -f $(EC) ] || { \
+	set -e ;\
+	ec_binary=ec-$(shell go env GOOS)-$(shell go env GOARCH) ;\
+	ec_tar=$(LOCALBIN)/$${ec_binary}.tar.gz ;\
+	curl -sSLo $${ec_tar} https://github.com/editorconfig-checker/editorconfig-checker/releases/download/$(EC_VERSION)/$${ec_binary}.tar.gz ;\
+	tar xzf $${ec_tar} ;\
+	rm -rf $${ec_tar} ;\
+	mv $(LOCALBIN)/$${ec_binary} $(EC) ;\
+	}
+
 .PHONY: ci
-ci: simulation-test lint docker-build hadolint check-generate check-manifests ## Run all checks run by the project continuous integration (CI) locally.
+ci: simulation-test lint docker-build hadolint check-generate check-manifests ec ## Run all checks run by the project continuous integration (CI) locally.
 
 .PHONY: simulation-test
 simulation-test: envtest ## Run unit and integration tests.
@@ -222,3 +237,7 @@ check-generate: generate ## Check if 'make generate' was run.
 .PHONY: check-manifests
 check-manifests: manifests ## Check if 'make manifests' was run.
 	test -z "$(shell git status --short)" || (echo "run 'make manifests' to generate code" && exit 1)
+
+.PHONY: ec
+ec: editorconfig ## Run file formatter checks against all project's files.
+	$(EC)
diff --git a/README.md b/README.md
index d7f50a4..6aa28eb 100644
--- a/README.md
+++ b/README.md
@@ -38,12 +38,12 @@ metadata:
   name: cluster
 spec:
   identityProviders:
-  - name: oadp_nac_test_provider 
-    mappingMethod: claim 
+  - name: oadp_nac_test_provider
+    mappingMethod: claim
     type: HTPasswd
     htpasswd:
       fileData:
-        name: htpass-secret 
+        name: htpass-secret
 EOF
 ```
 **Apply the OAuth file to the cluster:**
@@ -60,7 +60,7 @@ $ oc apply -f config/rbac/nonadminbackup_editor_role.yaml
 
 **Create Role Binding for our test user within nac-testing namespace:**
 **NOTE:** There could be also a ClusterRoleBinding for the nacuser or one of the groups
-to which nacuser belongs to easy administrative tasks and allow use of NAC for wider audience. Please see next paragraph. 
+to which nacuser belongs to easy administrative tasks and allow use of NAC for wider audience. Please see next paragraph.
 ```sh
 $ cat > nacuser-rolebinding.yaml <<EOF
 apiVersion: rbac.authorization.k8s.io/v1
@@ -114,8 +114,8 @@ export IMG_REGISTRY="quay.io/<USER>/oadp-nac"
 make docker-build docker-push IMG="${IMG_REGISTRY}:${NAC_REV}" CONTAINER_TOOL=podman
 ```
 
-**NOTE:** This image ought to be published in the personal registry you specified. 
-And it is required to have access to pull the image from the working environment. 
+**NOTE:** This image ought to be published in the personal registry you specified.
+And it is required to have access to pull the image from the working environment.
 Make sure you have the proper permission to the registry if the above commands don’t work.
 
 **Install the CRDs into the cluster:**
@@ -155,7 +155,7 @@ replicaset.apps/oadp-nac-controller-manager-74bbf4577b   1         1         1
 
 ```
 
-> **NOTE**: If you encounter RBAC errors, you may need to grant yourself cluster-admin 
+> **NOTE**: If you encounter RBAC errors, you may need to grant yourself cluster-admin
 privileges or be logged in as admin.
 
 **Create instances of your solution**
diff --git a/hack/boilerplate.go.txt b/hack/boilerplate.go.txt
index ff72ff2..06a460e 100644
--- a/hack/boilerplate.go.txt
+++ b/hack/boilerplate.go.txt
@@ -12,4 +12,4 @@ distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-*/
\ No newline at end of file
+*/