diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..a05dd77
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,72 @@
+name: Test
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  upload-file:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Create executable file
+        run: |
+            echo "#!/bin/bash" > hello.sh
+            echo "echo 'Hello world!'" >> hello.sh
+            chmod +x hello.sh
+
+      - name: Upload artifact
+        uses: ./
+        with:
+          name: hello
+          path: hello.sh
+
+      - name: Delete file
+        run: rm hello.sh
+
+      - name: Download artifact
+        uses: thebrowsercompany/gha-download-tar-artifact@main
+        with:
+          name: hello
+          path: .
+
+      - name: Run executable
+        run: |
+            ./hello.sh
+
+  upload-directory:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Create directory
+        run: |
+            mkdir -p hello
+            echo "Hello world!" > hello/world.txt
+            echo "#!/bin/bash" > hello/hello.sh
+            echo "echo 'Hello world!'" >> hello/hello.sh
+            chmod +x hello/hello.sh
+
+      - name: Upload artifact
+        uses: ./
+        with:
+          name: hello
+          path: hello/
+
+      - name: Delete directory
+        run: rm -rf hello
+
+      - name: Download artifact
+        uses: thebrowsercompany/gha-download-tar-artifact@main
+        with:
+          name: hello
+          path: .
+
+      - name: Check permissions
+        run: |
+            ./hello/hello.sh && ! test -x hello/world.txt
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..919ada1
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,29 @@
+BSD 3-Clause License
+
+Copyright (c) 2024, The Browser Company of New York
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e8bf0e3
--- /dev/null
+++ b/README.md
@@ -0,0 +1,38 @@
+# `@thebrowsercompany/gha-upload-tar-artifact`
+
+Tar and upload [Action Artifacts](https://docs.github.com/en/actions/using-workflows/storing-workflow-data-as-artifacts) from your Workflow Runs. Internally powered by GitHub's [@actions/upload-artifact](https://github.com/actions/upload-artifact) action. This action tars the provided path before using [@actions/upload-artifact](https://github.com/actions/upload-artifact) to upload the tar file, preserving permissions on non-Windows platforms.
+
+See also [gha-uncompress-download](https://github.com/thebrowsercompany/gha-uncompress-download). For further documenation, refer to the [@actions/upload-artifact](https://github.com/actions/upload-artifact) documentation.
+
+- [`@thebrowsercompany/gha-upload-tar-artifact`](#thebrowsercompanygha-upload-tar-artifact)
+  - [Usage](#usage)
+    - [Inputs](#inputs)
+    - [Outputs](#outputs)
+
+## Usage
+
+### Inputs
+
+```yaml
+- uses: thebrowsercompany/gha-upload-tar-artifact@main
+  with:
+    # Name of the artifact to upload.
+    name:
+
+    # A file or directory that describes what to upload.
+    # Required.
+    path:
+
+    # Duration after which artifact will expire in days. 0 means using default retention.
+    # Minimum 1 day.
+    # Maximum 90 days unless changed from the repository settings page.
+    # Optional. Defaults to repository settings.
+    retention-days:
+```
+
+### Outputs
+
+| Name | Description | Example |
+| - | - | - |
+| `artifact-id` | GitHub ID of an Artifact, can be used by the REST API | `1234` |
+| `artifact-url` | URL to download an Artifact. Can be used in many scenarios such as linking to artifacts in issues or pull requests. Users must be logged-in in order for this URL to work. This URL is valid as long as the artifact has not expired or the artifact, run or repository have not been deleted | `https://github.com/example-org/example-repo/actions/runs/1/artifacts/1234` |
diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..1b415b2
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,68 @@
+name: 'Tar and upload a path, preserving permissions'
+description: 'Upload a build artifact that can be used by subsequent workflow steps, with permissions preserved.'
+author: 'The Browser Company of New York'
+
+inputs:
+  name:
+    description: 'The name of the artifact to create.'
+    default: 'artifact'
+  path:
+    description: 'The path to compress and upload.'
+    required: true
+  retention-days:
+    description: >
+      Duration after which artifact will expire in days. 0 means using default retention.
+
+      Minimum 1 day.
+      Maximum 90 days unless changed from the repository settings page.
+    default: 0
+
+  outputs:
+    artifact-id:
+      description: >
+        A unique identifier for the artifact that was just uploaded. Empty if the artifact upload failed.
+
+        This ID can be used as input to other APIs to download, delete or get more information about an artifact: https://docs.github.com/en/rest/actions/artifacts
+    artifact-url:
+      description: >
+        A download URL for the artifact that was just uploaded. Empty if the artifact upload failed.
+
+        This download URL only works for requests Authenticated with GitHub. Anonymous downloads will be prompted to first login. 
+        If an anonymous download URL is needed than a short time restricted URL can be generated using the download artifact API: https://docs.github.com/en/rest/actions/artifacts#download-an-artifact
+
+        This URL will be valid for as long as the artifact exists and the workflow run and repository exists. Once an artifact has expired this URL will no longer work.
+        Common uses cases for such a download URL can be adding download links to artifacts in descriptions or comments on pull requests or issues.
+
+runs:
+  using: composite
+
+  defaults:
+    run:
+      shell: pwsh
+
+  steps:
+    - name: Create Tar Archive
+      id: create-tar
+      run: |
+        $TempDir = New-TemporaryFile | % { Remove-Item $_; New-Item -ItemType Directory -Path $_ }
+        $TarFile = Join-Path $TempDir "${{ inputs.name }}.tar"
+        Write-Host "tar-file=$TarFile" >> $env:GITHUB_OUTPUT
+        tar cf $TarFile -C "${{ inputs.path }}" .
+
+    - uses: actions/upload-artifact@v4
+      id: upload-artifact
+      with:
+        name: ${{ inputs.name }}
+        path: ${{ steps.create-tar.outputs.tar-file }}
+        retention-days: ${{ inputs.retention-days }}
+
+    - name: Delete Temporary Directory
+      run: |
+        $TempDir = Split-Path -Parent ${{ steps.create-tar.outputs.tar-file }}
+        Remove-Item -Recurse $TempDir
+
+    - name: Export Outputs
+      run: |
+        Write-Host "artifact-id=${{ steps.upload-artifact.outputs.artifact-id }}" >> $env:GITHUB_OUTPUT
+        Write-Host "artifact-url=${{ steps.upload-artifact.outputs.artifact-url }}" >> $env:GITHUB_OUTPUT
+