diff --git a/app/assets/javascripts/pages/ci/lints/ci_lint_editor.js b/app/assets/javascripts/pages/projects/ci/lints/ci_lint_editor.js
similarity index 100%
rename from app/assets/javascripts/pages/ci/lints/ci_lint_editor.js
rename to app/assets/javascripts/pages/projects/ci/lints/ci_lint_editor.js
diff --git a/app/assets/javascripts/pages/ci/lints/show/index.js b/app/assets/javascripts/pages/projects/ci/lints/create/index.js
similarity index 100%
rename from app/assets/javascripts/pages/ci/lints/show/index.js
rename to app/assets/javascripts/pages/projects/ci/lints/create/index.js
diff --git a/app/assets/javascripts/pages/projects/ci/lints/show/index.js b/app/assets/javascripts/pages/projects/ci/lints/show/index.js
new file mode 100644
index 00000000000..8e8a843da0b
--- /dev/null
+++ b/app/assets/javascripts/pages/projects/ci/lints/show/index.js
@@ -0,0 +1,3 @@
+import CILintEditor from '../ci_lint_editor';
+
+document.addEventListener('DOMContentLoaded', () => new CILintEditor());
diff --git a/app/controllers/ci/lints_controller.rb b/app/controllers/ci/lints_controller.rb
index e9bd1689a1e..738a6a5173e 100644
--- a/app/controllers/ci/lints_controller.rb
+++ b/app/controllers/ci/lints_controller.rb
@@ -4,20 +4,5 @@ module Ci
 
     def show
     end
-
-    def create
-      @content = params[:content]
-      @error = Gitlab::Ci::YamlProcessor.validation_message(@content)
-      @status = @error.blank?
-
-      if @error.blank?
-        @config_processor = Gitlab::Ci::YamlProcessor.new(@content)
-        @stages = @config_processor.stages
-        @builds = @config_processor.builds
-        @jobs = @config_processor.jobs
-      end
-
-      render :show
-    end
   end
 end
diff --git a/app/controllers/projects/ci/lints_controller.rb b/app/controllers/projects/ci/lints_controller.rb
new file mode 100644
index 00000000000..47328504cd5
--- /dev/null
+++ b/app/controllers/projects/ci/lints_controller.rb
@@ -0,0 +1,31 @@
+class Projects::Ci::LintsController < Projects::ApplicationController
+  before_action :ensure_user_access
+
+  def show
+  end
+
+  def create
+    @content = params[:content]
+    @error = Gitlab::Ci::YamlProcessor.validation_message(@content,  yaml_processor_options)
+    @status = @error.blank?
+
+    if @error.blank?
+      @config_processor = Gitlab::Ci::YamlProcessor.new(@content, yaml_processor_options)
+      @stages = @config_processor.stages
+      @builds = @config_processor.builds
+      @jobs = @config_processor.jobs
+    end
+
+    render :show
+  end
+
+  private
+
+  def yaml_processor_options
+    { project: @project, sha: project.repository.commit.sha }
+  end
+
+  def ensure_user_access
+    return access_denied! unless can?(current_user, :create_pipeline, @project)
+  end
+end
diff --git a/app/views/ci/lints/show.html.haml b/app/views/ci/lints/show.html.haml
index 3c0881caa06..2f8387dc762 100644
--- a/app/views/ci/lints/show.html.haml
+++ b/app/views/ci/lints/show.html.haml
@@ -1,27 +1,6 @@
 - page_title "CI Lint"
-- page_description "Validate your GitLab CI configuration file"
-- content_for :library_javascripts do
-  = page_specific_javascript_tag('lib/ace.js')
 
-%h2 Check your .gitlab-ci.yml
-
-.ci-linter
-  .row
-    = form_tag ci_lint_path, method: :post do
-      .form-group
-        .col-sm-12
-          .file-holder
-            .js-file-title.file-title.clearfix
-              Content of .gitlab-ci.yml
-            #ci-editor.ci-editor= @content
-          = text_area_tag(:content, @content, class: 'hidden form-control span1', rows: 7, require: true)
-      .col-sm-12
-        .pull-left.prepend-top-10
-          = submit_tag('Validate', class: 'btn btn-success submit-yml')
-        .pull-right.prepend-top-10
-          = button_tag('Clear', type: 'button', class: 'btn btn-default clear-yml')
-
-  .row.prepend-top-20
-    .col-sm-12
-      .results.ci-template
-        = render partial: 'create' if defined?(@status)
+.center
+  = image_tag 'illustrations/feature_moved.svg'
+  %h3 GitLab CI Linter has been moved
+  %p To validate your GitLab CI configurations, go to 'CI/CD → Pipelines' inside your project, and click on the "CI Lint" button.
diff --git a/app/views/ci/lints/_create.html.haml b/app/views/projects/ci/lints/_create.html.haml
similarity index 100%
rename from app/views/ci/lints/_create.html.haml
rename to app/views/projects/ci/lints/_create.html.haml
diff --git a/app/views/projects/ci/lints/show.html.haml b/app/views/projects/ci/lints/show.html.haml
new file mode 100644
index 00000000000..cf2a25ce844
--- /dev/null
+++ b/app/views/projects/ci/lints/show.html.haml
@@ -0,0 +1,27 @@
+- page_title "CI Lint"
+- page_description "Validate your GitLab CI configuration file"
+- content_for :library_javascripts do
+  = page_specific_javascript_tag('lib/ace.js')
+
+%h2 Check your .gitlab-ci.yml
+
+.ci-linter
+  .row
+    = form_tag project_ci_lint_path(@project), method: :post do
+      .form-group
+        .col-sm-12
+          .file-holder
+            .js-file-title.file-title.clearfix
+              Content of .gitlab-ci.yml
+            #ci-editor.ci-editor= @content
+          = text_area_tag(:content, @content, class: 'hidden form-control span1', rows: 7, require: true)
+      .col-sm-12
+        .pull-left.prepend-top-10
+          = submit_tag('Validate', class: 'btn btn-success submit-yml')
+        .pull-right.prepend-top-10
+          = button_tag('Clear', type: 'button', class: 'btn btn-default clear-yml')
+
+  .row.prepend-top-20
+    .col-sm-12
+      .results.ci-template
+        = render partial: 'create' if defined?(@status)
diff --git a/app/views/projects/pipelines/index.html.haml b/app/views/projects/pipelines/index.html.haml
index 3e6b3346787..c0ee81fe28d 100644
--- a/app/views/projects/pipelines/index.html.haml
+++ b/app/views/projects/pipelines/index.html.haml
@@ -10,6 +10,6 @@
     "no-pipelines-svg-path" => image_path('illustrations/pipelines_pending.svg'),
     "can-create-pipeline" => can?(current_user, :create_pipeline, @project).to_s,
     "new-pipeline-path" => can?(current_user, :create_pipeline, @project) && new_project_pipeline_path(@project),
-    "ci-lint-path" => can?(current_user, :create_pipeline, @project) && ci_lint_path,
+    "ci-lint-path" => can?(current_user, :create_pipeline, @project) && project_ci_lint_path(@project),
     "reset-cache-path" => can?(current_user, :admin_pipeline, @project) && reset_cache_project_settings_ci_cd_path(@project) ,
     "has-gitlab-ci" => (@project.has_ci? && @project.builds_enabled?).to_s } }
diff --git a/changelogs/unreleased/43603-ci-lint-support.yml b/changelogs/unreleased/43603-ci-lint-support.yml
new file mode 100644
index 00000000000..8e4a92c0287
--- /dev/null
+++ b/changelogs/unreleased/43603-ci-lint-support.yml
@@ -0,0 +1,5 @@
+---
+title: Move ci/lint under project's namespace
+merge_request: 17729
+author:
+type: added
diff --git a/config/routes/ci.rb b/config/routes/ci.rb
index 60c1724bc05..ebd321ed097 100644
--- a/config/routes/ci.rb
+++ b/config/routes/ci.rb
@@ -1,5 +1,5 @@
 namespace :ci do
-  resource :lint, only: [:show, :create]
+  resource :lint, only: :show
 
   root to: redirect('')
 end
diff --git a/config/routes/project.rb b/config/routes/project.rb
index f50b9aded8d..656ba6834f2 100644
--- a/config/routes/project.rb
+++ b/config/routes/project.rb
@@ -423,6 +423,10 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
         resource :repository, only: [:show], controller: :repository
       end
 
+      namespace :ci do
+        resource :lint, only: [:show, :create]
+      end
+
       # Since both wiki and repository routing contains wildcard characters
       # its preferable to keep it below all other project routes
       draw :wiki
diff --git a/lib/gitlab/ci/config.rb b/lib/gitlab/ci/config.rb
index f7ff7ea212e..1c2e86cd1cb 100644
--- a/lib/gitlab/ci/config.rb
+++ b/lib/gitlab/ci/config.rb
@@ -4,7 +4,7 @@ module Gitlab
     # Base GitLab CI Configuration facade
     #
     class Config
-      def initialize(config)
+      def initialize(config, opts = {})
         @config = Loader.new(config).load!
 
         @global = Entry::Global.new(@config)
diff --git a/lib/gitlab/ci/yaml_processor.rb b/lib/gitlab/ci/yaml_processor.rb
index bc2a6f98dae..e829f2a95f8 100644
--- a/lib/gitlab/ci/yaml_processor.rb
+++ b/lib/gitlab/ci/yaml_processor.rb
@@ -7,8 +7,8 @@ module Gitlab
 
       attr_reader :cache, :stages, :jobs
 
-      def initialize(config)
-        @ci_config = Gitlab::Ci::Config.new(config)
+      def initialize(config, opts = {})
+        @ci_config = Gitlab::Ci::Config.new(config, opts)
         @config = @ci_config.to_hash
 
         unless @ci_config.valid?
@@ -73,11 +73,11 @@ module Gitlab
         end
       end
 
-      def self.validation_message(content)
+      def self.validation_message(content, opts = {})
         return 'Please provide content of .gitlab-ci.yml' if content.blank?
 
         begin
-          Gitlab::Ci::YamlProcessor.new(content)
+          Gitlab::Ci::YamlProcessor.new(content, opts)
           nil
         rescue ValidationError => e
           e.message
diff --git a/spec/controllers/projects/ci/lints_controller_spec.rb b/spec/controllers/projects/ci/lints_controller_spec.rb
new file mode 100644
index 00000000000..1249a5528a9
--- /dev/null
+++ b/spec/controllers/projects/ci/lints_controller_spec.rb
@@ -0,0 +1,123 @@
+require 'spec_helper'
+
+describe Projects::Ci::LintsController do
+  let(:project) { create(:project, :repository) }
+  let(:user) { create(:user) }
+
+  before do
+    sign_in(user)
+  end
+
+  describe 'GET #show' do
+    context 'with enough privileges' do
+      before do
+        project.add_developer(user)
+
+        get :show, namespace_id: project.namespace, project_id: project
+      end
+
+      it 'should be success' do
+        expect(response).to be_success
+      end
+
+      it 'should render show page' do
+        expect(response).to render_template :show
+      end
+
+      it 'should retrieve project' do
+        expect(assigns(:project)).to eq(project)
+      end
+    end
+
+    context 'without enough privileges' do
+      before do
+        project.add_guest(user)
+
+        get :show, namespace_id: project.namespace, project_id: project
+      end
+
+      it 'should respond with 404' do
+        expect(response).to have_gitlab_http_status(404)
+      end
+    end
+  end
+
+  describe 'POST #create' do
+    let(:remote_file_path) { 'https://gitlab.com/gitlab-org/gitlab-ce/blob/1234/.gitlab-ci-1.yml' }
+
+    let(:remote_file_content) do
+      <<~HEREDOC
+      before_script:
+        - apt-get update -qq && apt-get install -y -qq sqlite3 libsqlite3-dev nodejs
+        - ruby -v
+        - which ruby
+        - gem install bundler --no-ri --no-rdoc
+        - bundle install --jobs $(nproc)  "${FLAGS[@]}"
+      HEREDOC
+    end
+
+    let(:content) do
+      <<~HEREDOC
+      include:
+        - #{remote_file_path}
+
+      rubocop:
+        script:
+          - bundle exec rubocop
+      HEREDOC
+    end
+
+    context 'with a valid gitlab-ci.yml' do
+      before do
+        WebMock.stub_request(:get, remote_file_path).to_return(body: remote_file_content)
+        project.add_developer(user)
+
+        post :create, namespace_id: project.namespace, project_id: project, content: content
+      end
+
+      it 'should be success' do
+        expect(response).to be_success
+      end
+
+      it 'render show page' do
+        expect(response).to render_template :show
+      end
+
+      it 'should retrieve project' do
+        expect(assigns(:project)).to eq(project)
+      end
+    end
+
+    context 'with an invalid gitlab-ci.yml' do
+      let(:content) do
+        <<~HEREDOC
+        rubocop:
+          scriptt:
+            - bundle exec rubocop
+        HEREDOC
+      end
+
+      before do
+        project.add_developer(user)
+
+        post :create, namespace_id: project.namespace, project_id: project, content: content
+      end
+
+      it 'should assign errors' do
+        expect(assigns[:error]).to eq('jobs:rubocop config contains unknown keys: scriptt')
+      end
+    end
+
+    context 'without enough privileges' do
+      before do
+        project.add_guest(user)
+
+        post :create, namespace_id: project.namespace, project_id: project, content: content
+      end
+
+      it 'should respond with 404' do
+        expect(response).to have_gitlab_http_status(404)
+      end
+    end
+  end
+end
diff --git a/spec/features/ci_lint_spec.rb b/spec/features/projects/ci/lint_spec.rb
similarity index 91%
rename from spec/features/ci_lint_spec.rb
rename to spec/features/projects/ci/lint_spec.rb
index 220b934154e..313950072e7 100644
--- a/spec/features/ci_lint_spec.rb
+++ b/spec/features/projects/ci/lint_spec.rb
@@ -1,10 +1,14 @@
 require 'spec_helper'
 
 describe 'CI Lint', :js do
-  before do
-    sign_in(create(:user))
+  let(:project) { create(:project, :repository) }
+  let(:user) { create(:user) }
 
-    visit ci_lint_path
+  before do
+    project.add_developer(user)
+    sign_in(user)
+
+    visit project_ci_lint_path(project)
     find('#ci-editor')
     execute_script("ace.edit('ci-editor').setValue(#{yaml_content.to_json});")
 
diff --git a/spec/views/ci/lints/show.html.haml_spec.rb b/spec/views/projects/ci/lints/show.html.haml_spec.rb
similarity index 92%
rename from spec/views/ci/lints/show.html.haml_spec.rb
rename to spec/views/projects/ci/lints/show.html.haml_spec.rb
index ded320793ea..b50acc54276 100644
--- a/spec/views/ci/lints/show.html.haml_spec.rb
+++ b/spec/views/projects/ci/lints/show.html.haml_spec.rb
@@ -1,12 +1,14 @@
 require 'spec_helper'
 
-describe 'ci/lints/show' do
+describe 'projects/ci/lints/show' do
   include Devise::Test::ControllerHelpers
+  let(:project) { create(:project, :repository) }
 
   describe 'XSS protection' do
     let(:config_processor) { Gitlab::Ci::YamlProcessor.new(YAML.dump(content)) }
 
     before do
+      assign(:project, project)
       assign(:status, true)
       assign(:builds, config_processor.builds)
       assign(:stages, config_processor.stages)
@@ -64,6 +66,7 @@ describe 'ci/lints/show' do
 
   context 'when the content is valid' do
     before do
+      assign(:project, project)
       assign(:status, true)
       assign(:builds, config_processor.builds)
       assign(:stages, config_processor.stages)
@@ -83,6 +86,7 @@ describe 'ci/lints/show' do
 
   context 'when the content is invalid' do
     before do
+      assign(:project, project)
       assign(:status, false)
       assign(:error, 'Undefined error')
     end