diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..0d08e26
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,11 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
new file mode 100644
index 0000000..9d3bfda
--- /dev/null
+++ b/.github/workflows/build-and-test.yml
@@ -0,0 +1,35 @@
+name: build-and-test
+
+on:
+  push:
+    # all branches
+  pull_request:
+    # all branches
+
+  # This enables the Run Workflow button on the Actions tab.
+  workflow_dispatch:
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install Opendylan
+        uses: dylan-lang/install-opendylan@v3
+
+      - name: Download dependencies
+        run: dylan update
+
+      - name: Build tests
+        run: dylan build base64-test-suite
+
+      - name: Run tests
+        run: _build/bin/base64-test-suite --progress none --report surefire > _build/TEST-base64.xml
+
+      - name: Publish Test Report
+        if: success() || failure()
+        uses: mikepenz/action-junit-report@v4
+        with:
+          report_paths: '**/_build/TEST-*.xml'
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..46d23fa
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,19 @@
+# backup files
+*~
+*.bak
+.DS_Store
+
+# project file
+*.hdp
+
+# documentation build directory
+build/
+
+# compiler build directory
+_build/
+
+# dylan tool package cache
+_packages/
+
+# package registry folder
+registry/
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..280586e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,85 @@
+# Base64
+[![build-and-test](https://github.com/dylan-lang/base64/actions/workflows/build-and-test.yml/badge.svg)](https://github.com/dylan-lang/base64/actions/workflows/build-and-test.yml)
+
+Base64 implementation for Dylan
+
+## Abstract
+
+This library implements the Base64 transfer encoding algorithm as
+defined in [RFC 1521](https://datatracker.ietf.org/doc/html/rfc1521)
+by Borensten & Freed, September 1993.
+
+# Usage
+
+## Functions exported
+
+This library exports two functions
+
+- `base-64-encode (string) => (string)` and
+
+- `base-64-decode (string) => (string)`
+
+## Types of encoding
+
+The functions have two types of encoding/decoding:
+
+- `#"standard"` (default) and
+
+- `#"http"`
+
+The main difference between them are the padding characters used. You
+can choose the type with the key parameter `encoding:` (see example below).
+
+## Example
+
+### Standard encoding/decoding
+
+Here is an example of usage of the standard encoding/decoding:
+
+```dylan
+// Example string to encode
+let original-string = "Many hands make light work.";
+
+// Encoding the string to base64 standard
+let encoded-standard = base64-encode(original-string);
+format-out("Encoded string: %=\n", encoded-standard);
+
+// Shows in output
+// Encoded string: "TWFueSBoYW5kcyBtYWtlIGxpZ2h0IHdvcmsu"
+
+// Decoding the string in base64 standard
+let decoded-string = base64-decode(encoded-standard);
+format-out("Decoded string: %=\n", decoded-string);
+
+// Shows in output
+// Decoded string: "Many hands make light work."
+```
+### HTTP encoding/decoding
+
+To show the http encoding/decoding we will use a text that forces the
+padding (base64 encoding uses padding to ensure that the length of the
+encoded string is a multiple of 4 bytes).
+
+```dylan
+// Example string to encode, note the missing dot at the end
+let original-string = "Many hands make light work";
+
+// Encoding the string to base64 http
+let encoded-http = base64-encode(original-string, encoding: #"http");
+format-out("Encoded string: %=\n", encoded-http);
+
+// Shows in output (note the padding character '@')
+// Encoded string: "TWFueSBoYW5kcyBtYWtlIGxpZ2h0IHdvcms@"
+
+// Decoding the string in base64 http
+let decoded-string = base64-decode(encoded-http, encoding: #"http");
+format-out("Decoded string: %=\n", decoded-string);
+
+// Shows in output
+// Decoded string: "Many hands make light work"
+```
+
+## Author
+
+Original version written in Common Lisp by Juri Pakaste <juri@iki.fi>.
+Converted to Dylan by Carl Gay, July 2002.
\ No newline at end of file
diff --git a/dylan-package.json b/dylan-package.json
new file mode 100644
index 0000000..20f6089
--- /dev/null
+++ b/dylan-package.json
@@ -0,0 +1,13 @@
+{
+    "category": "encoding",
+    "contact": "dylan-lang@googlegroups.com",
+    "dependencies": [  ],
+    "dev-dependencies": [ "testworks" ],
+    "description": "Base64 encoding",
+    "name": "base64",
+    "version": "0.1.1",
+    "url": "https://github.com/dylan-lang/base64",
+    "keywords": [ "base64", "binary" ],
+    "license": "Unlicensed",
+    "license-url": "http://unlicense.org/"
+}
diff --git a/tests/base64-test-suite.dylan b/tests/base64-test-suite.dylan
new file mode 100644
index 0000000..e8b7ff3
--- /dev/null
+++ b/tests/base64-test-suite.dylan
@@ -0,0 +1,30 @@
+Module: base64-test-suite
+
+define constant $text-samples
+  = #["Many hands make light work.",
+      "Many hands make light work"];
+
+define constant $encoded-standard-samples
+  = #["TWFueSBoYW5kcyBtYWtlIGxpZ2h0IHdvcmsu",
+      "TWFueSBoYW5kcyBtYWtlIGxpZ2h0IHdvcms="];
+
+define constant $encoded-http-samples
+  = #["TWFueSBoYW5kcyBtYWtlIGxpZ2h0IHdvcmsu",
+      "TWFueSBoYW5kcyBtYWtlIGxpZ2h0IHdvcms@"];
+
+define test test-base64-standard ()
+  for (text in $text-samples, encoded in $encoded-standard-samples)
+    assert-equal(encoded, base64-encode(text));
+    assert-equal(text, base64-decode(encoded))
+  end
+end;
+
+define test test-base64-http ()
+  for (text in $text-samples, encoded in $encoded-http-samples)
+    assert-equal(encoded, base64-encode(text, encoding: #"http"));
+    assert-equal(text, base64-decode(encoded, encoding: #"http"))
+  end
+end;
+
+// Use `_build/bin/base64-test-suite --help` to see options.
+run-test-application()
diff --git a/tests/base64-test-suite.lid b/tests/base64-test-suite.lid
new file mode 100644
index 0000000..c624fad
--- /dev/null
+++ b/tests/base64-test-suite.lid
@@ -0,0 +1,4 @@
+Library: base64-test-suite
+Files: library.dylan
+       base64-test-suite.dylan
+Target-Type: executable
diff --git a/tests/library.dylan b/tests/library.dylan
new file mode 100644
index 0000000..3d0ebca
--- /dev/null
+++ b/tests/library.dylan
@@ -0,0 +1,13 @@
+Module: dylan-user
+
+define library base64-test-suite
+  use common-dylan;
+  use testworks;
+  use base64;
+end library;
+
+define module base64-test-suite
+  use common-dylan;
+  use testworks;
+  use base64;
+end module;