diff --git a/.github/workflows/build-audit.yml b/.github/workflows/build-audit.yml
index eb3476d..858d2c1 100644
--- a/.github/workflows/build-audit.yml
+++ b/.github/workflows/build-audit.yml
@@ -1,5 +1,5 @@
 ---
-# yamllint disable rule:key-ordering
+# yamllint disable rule:key-ordering rule:line-length
 name: build-audit
 on: # yamllint disable-line
   pull_request:
@@ -11,16 +11,30 @@ on: # yamllint disable-line
     - synchronize
     - reopened
 jobs:
-  # yamllint disable rule:line-length
-  audit-only:
+  build-unminified-site:
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@v3
-    - name: Run audit-build-action-hugo using config from tests/config
+    - uses: actions/checkout@v4
+    - name: Build site with Hugo and audit
       uses: wildtechgarden/audit-build-action-hugo@main
       with:
         base-url: "https://example.com/"
         config-file: hugo.toml
         hugo-version: latest
+        upload-site-as: unminified-site
         source-directory: tests/config
+    - name: Validate HTML in output-directory
+      uses: ./
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        use-existing-workspace: "true"
+  validate-html-artifact:
+    needs: build-unminified-site
+    runs-on: ubuntu-22.04
+    steps:
+    - uses: actions/checkout@v4
+    - name: Validate HTML from artifact
+      uses: ./
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
 ...
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 67c973b..432bec5 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -115,7 +115,7 @@ repos:
   hooks:
   - id: editorconfig-checker
     alias: ec
-    exclude: ^(LICENSE$|README.md$|package(-lock)?.json$|_vendor)
+    exclude: ^(LICENSE$|README.*\.md$|package(-lock)?.json$|_vendor)
 
 - repo: "https://github.com/streetsidesoftware/cspell-cli"
   rev: v7.3.0
diff --git a/README.fr.md b/README.fr.md
index a34f51d..eec14b5 100644
--- a/README.fr.md
+++ b/README.fr.md
@@ -10,18 +10,64 @@ Statut IC: [![pre-commit.ci statut](https://results.pre-commit.ci/badge/github/w
 ## Matières
 
 1. [Matières](#matières)
-2. [Fonctionnalités](#fonctionnalités)
-3. [Utilisation](#utilisation)
-4. [Développement](#développement)
-5. [Colophon](#colophon)
+2. [Configuration and utilisation](#configuration-and-utilisation)
+   1. [Actions inputs variables](#actions-inputs-variables)
+   2. [Sample usage](#sample-usage)
+3. [Développement](#développement)
+4. [Colophon](#colophon)
 
-## Fonctionnalités
+## Configuration and utilisation
 
-TBD
+### Actions inputs variables
 
-## Utilisation
+| Input | Required | Default | Dit-on |
+|-------|-------|---------|---------|
+| download-site-as | oui | unminified-site | GitHub Artifact qui contenu le tarball avec le site |
+| download-site-filename | oui | hugo-site.tar | Nom de tarball qui contenu le site |
+| output-directory | oui | public | subdirectory (en tarball) contenu le site a vérifier |
+| repo-token | oui | _(none)_ | GITHUB_TOKEN |
+| use-existing-workspace | non | false | Utiliser un workspace existent et le site créer vers un artefact |
 
-TBD
+Le tarball (défaut ``hugo-site.tar``) en l'artefact (défaut
+``unminified-site``) avec le nom en ``download-site-as`` et contenu:
+
+* Un subdirectory contenu le site (défaut: _public_, ou option
+á ``output-directory``).
+
+### Sample usage
+
+```yaml
+name: test-html-validate
+on:
+  pull_request:
+    types:
+    - assigned
+    - opened
+    - synchronize
+    - reopened
+  push:
+    branches:
+    - main
+jobs:
+  build-unminified-site:
+    runs-on: ubuntu-20.04
+    steps:
+    - name: "Créer site avec Hugo et auditer"
+      uses: wildtechgarden/audit-build-action-hugo-dfd@main
+      with:
+        base-url: "https://www.example.com/"
+        build-for-downstream: "true"
+        source-directory: échantillon
+        use-lfs: false
+    - uses: actions/checkout@v3
+      with:
+        path: validate-html-action
+    - name: "Vérifier HTML de site"
+      uses: wildtechgarden/validator-html-action@main
+      with:
+        action-workspace: ${{ github.workspace }}/validate-html-action
+        use-existing-workspace: "true"
+```
 
 ## Développement
 
diff --git a/README.md b/README.md
index 2f42561..3bad605 100644
--- a/README.md
+++ b/README.md
@@ -10,18 +10,65 @@ CI Status: [![pre-commit.ci status](https://results.pre-commit.ci/badge/github/w
 ## Contents
 
 1. [Contents](#contents)
-2. [Features](#features)
-3. [Usage](#usage)
-4. [Development](#development)
-5. [Colophon](#colophon)
+2. [Configuration and usage](#configuration-and-usage)
+   1. [Actions inputs variables](#actions-inputs-variables)
+   2. [Sample usage](#sample-usage)
+3. [Development](#development)
+4. [Colophon](#colophon)
 
-## Features
+## Configuration and usage
 
-TBD
+### Actions inputs variables
 
-## Usage
+| Input | Required | Default | Meaning |
+|-------|-------|---------|---------|
+| download-site-as | yes | unminified-site | GitHub Artifact containing a tarball with the site |
+| download-site-filename | yes | hugo-site.tar | Name of tarball containing the site |
+| output-directory | yes | public | subdirectory (in tarball) containing the site to validate |
+| repo-token | yes | _(none)_ | GITHUB_TOKEN |
+| use-existing-workspace | no | false | Use an existing checkout and built site instead of artifact |
 
-TBD
+The tarball (default ``hugo-site.tar``) in the artifact (default
+``unminified-site``) pointed at by ``download-site-as`` must contain the
+following:
+
+* A subdirectory tree containing the site (default: _public_, optionally
+defined by ``output-directory``).
+
+### Sample usage
+
+```yaml
+name: test-html-validate
+on:
+  pull_request:
+    types:
+    - assigned
+    - opened
+    - synchronize
+    - reopened
+  push:
+    branches:
+    - main
+jobs:
+  build-unminified-site:
+    runs-on: ubuntu-20.04
+    steps:
+    - name: "Build site with Hugo and audit"
+      uses: wildtechgarden/audit-build-action-hugo-dfd@main
+      with:
+        base-url: "https://www.example.com/"
+        build-for-downstream: "true"
+        source-directory: exampleSite
+        use-lfs: false
+    - uses: actions/checkout@v3
+      with:
+        path: validate-html-action
+    - name: "Validate HTML of statically generated website"
+      uses: wildtechgarden/validator-html-action@main
+      with:
+        action-workspace: ${{ github.workspace }}/validate-html-action
+        use-existing-workspace: "true"
+```
 
 ## Development
 
diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..919ccf5
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,83 @@
+---
+# yamllint disable rule:key-ordering
+# cspell:ignore OUTPUTDIR endswith
+name: DFD Validate HTML (Hugo)
+author: Daniel F. Dickinson
+description: Validate HTML and CSS of a static site
+branding:
+  color: blue
+  icon: check-circle
+inputs:
+  download-site-as:
+    description: Artifact containing the Hugo site
+    required: true
+    default: unminified-site
+  download-site-filename:
+    description: Filename for tarball of site to download from artifact
+    required: true
+    default: hugo-site.tar
+  output-directory:
+    description: Location of output site
+    required: true
+    default: public
+  repo-token:
+    description: GITHUB_TOKEN
+    required: true
+  use-existing-workspace:
+    description: Use an existing checkout and built site instead of artifact
+    required: false
+    default: "false"
+runs:
+  using: composite
+  steps:
+  - uses: actions/download-artifact@v3
+    if: inputs.use-existing-workspace != 'true'
+    with:
+      name: ${{ inputs.download-site-as }}
+  - name: Extract site and configs
+    if: inputs.use-existing-workspace != 'true'
+    shell: bash
+    env:
+      DOWNLOAD_SITE_FILENAME: ${{ inputs.download-site-filename }}
+    run: tar -xf "${DOWNLOAD_SITE_FILENAME}"
+  - name: Install Java
+    shell: bash
+    run: |
+      sudo apt-get update
+      sudo apt-get install default-jre
+  - name: Get validator
+    shell: bash
+    env:
+      GITHUB_WORKSPACE: ${{ github.workspace }}
+      # Avoid runner API rate-limiting
+      GH_TOKEN: ${{ inputs.repo-token }}
+    run: |
+      curl --header "Authorization: Bearer $GH_TOKEN" -o vnu.jar.zip -sL \
+      $(curl --request GET --header "Accept: application/vnd.github+json" \
+      --header "Authorization: Bearer $GH_TOKEN" -s --url \
+      https://api.github.com/repos/validator/validator/releases/latest | jq -r \
+      ". as \$artifacts | .tag_name as \$version | \
+      \$artifacts | .assets | .[] | [.name, .browser_download_url] | \
+      if (.[0] | contains(\$version) and contains(\"vnu.jar\") and \
+      endswith(\"zip\")) \
+      then .[1] \
+      else empty \
+      end") && unzip vnu.jar.zip && \
+      mkdir -p jar && mv dist/vnu.jar jar/ && mv dist/index.html jar/ && \
+      mv dist/README.md jar/ && rm -rf dist && rm -f vnu.jar.zip
+  - name: Validate site HTML
+    shell: bash
+    env:
+      OUTPUT_DIRECTORY: ${{ inputs.output-directory }}
+      # yamllint disable rule:line-length
+    run: |
+      java -jar jar/vnu.jar --Werror --skip-non-html ${OUTPUT_DIRECTORY}
+  - name: Validate site CSS
+    shell: bash
+    env:
+      OUTPUT_DIRECTORY: ${{ inputs.output-directory }}
+      # yamllint disable rule:line-length
+    run: |
+      java -jar jar/vnu.jar --skip-non-css --Werror ${OUTPUT_DIRECTORY}
+    # yamllint enable
+...
diff --git a/words-fr-project.txt b/words-fr-project.txt
index 0733977..8398a5e 100644
--- a/words-fr-project.txt
+++ b/words-fr-project.txt
@@ -3,3 +3,14 @@ Commons
 Garden
 ShareAlike
 Wild
+existing
+false
+hugo
+hvm
+tarball
+assigned
+opened
+reopened
+downstream
+true
+checkout