diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..7855847
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,46 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - ci
+  pull_request:
+    branches:
+      - ci
+
+jobs:
+  gcc-linux:
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/ednolan/ubuntu24.10_gcc14.2.0
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Run
+        run: |
+          ./ci.sh -fsanitize=address -fsanitize=undefined -fsanitize-undefined-trap-on-error
+  clang-linux:
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/ednolan/ubuntu24.10_clang19.1.0rc2
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Run
+        run: |
+          ./ci.sh -fsanitize=address -fsanitize=undefined -fsanitize-undefined-trap-on-error -stdlib=libc++ -Wno-unqualified-std-cast-call
+  msvc-windows:
+    runs-on: windows-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Run
+        shell: bash
+        run: |
+          ./ci.sh
diff --git a/ci.sh b/ci.sh
new file mode 100755
index 0000000..02407a5
--- /dev/null
+++ b/ci.sh
@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+function main() {
+    local -a cxx_flags=("$@")
+    local checkout="$PWD"
+    mkdir "$checkout/build"
+    cd "$checkout/build"
+    cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_STANDARD=23 -DBUILD_TESTING=On -DCMAKE_CXX_FLAGS="${cxx_flags[*]}"
+    cmake --build . --parallel
+    if [[ -d "$checkout/build/Debug" ]] ; then # windows
+        ctest -C Debug
+    else
+        ctest
+    fi
+}
+
+main "$@"
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..05b7949
--- /dev/null
+++ b/readme.md
@@ -0,0 +1 @@
+[![CI](https://github.com/ednolan/utfview/actions/workflows/ci.yml/badge.svg)](https://github.com/ednolan/utfview/actions)