diff --git a/src/components/nav/NavActions.tsx b/src/components/nav/NavActions.tsx
index 64e8ac8..73df885 100644
--- a/src/components/nav/NavActions.tsx
+++ b/src/components/nav/NavActions.tsx
@@ -1,11 +1,18 @@
 "use client";
 
 import { EditorAboutDropdown } from "@/components/nav/EditorAboutDropdown";
+import { IconButton } from "@/components/ui/IconButton";
 import { ThemeToggle } from "@/components/ui/ThemeToggle";
+import { GitHubIcon } from "@/icons/GitHubIcon";
+
+const REPO_URL = "https://github.com/EarthyScience/EarthPrints";
 
 export function NavActions() {
   return (
     <div className="ml-auto flex items-center gap-2 overflow-visible">
+      <IconButton href={REPO_URL} aria-label="View source on GitHub">
+        <GitHubIcon />
+      </IconButton>
       <EditorAboutDropdown />
       <ThemeToggle />
     </div>
diff --git a/src/components/ui/IconButton.tsx b/src/components/ui/IconButton.tsx
index 53e034b..aa993dd 100644
--- a/src/components/ui/IconButton.tsx
+++ b/src/components/ui/IconButton.tsx
@@ -5,6 +5,8 @@ type IconButtonProps = {
   "aria-label": string;
   "aria-expanded"?: boolean;
   "aria-controls"?: string;
+  /** When set, renders an anchor to this URL instead of a button. */
+  href?: string;
 };
 
 // Every IconButton renders inside the editor nav, so the editor sizing/colour
@@ -21,11 +23,29 @@ export function IconButton({
   "aria-label": ariaLabel,
   "aria-expanded": ariaExpanded,
   "aria-controls": ariaControls,
+  href,
 }: IconButtonProps) {
+  const classes = [ICON_BUTTON_CLASS, className].filter(Boolean).join(" ");
+
+  if (href) {
+    return (
+      <a
+        href={href}
+        target="_blank"
+        rel="noreferrer noopener"
+        className={classes}
+        aria-label={ariaLabel}
+        onClick={onClick}
+      >
+        {children}
+      </a>
+    );
+  }
+
   return (
     <button
       type="button"
-      className={[ICON_BUTTON_CLASS, className].filter(Boolean).join(" ")}
+      className={classes}
       onClick={onClick}
       aria-label={ariaLabel}
       aria-expanded={ariaExpanded}
diff --git a/src/icons/GitHubIcon.tsx b/src/icons/GitHubIcon.tsx
new file mode 100644
index 0000000..d03d319
--- /dev/null
+++ b/src/icons/GitHubIcon.tsx
@@ -0,0 +1,13 @@
+export function GitHubIcon() {
+  return (
+    <svg
+      width="16"
+      height="16"
+      viewBox="0 0 24 24"
+      fill="currentColor"
+      aria-hidden="true"
+    >
+      <path d="M12 2C6.48 2 2 6.58 2 12.25c0 4.53 2.87 8.37 6.84 9.73.5.1.68-.22.68-.49 0-.24-.01-.87-.01-1.71-2.78.62-3.37-1.37-3.37-1.37-.46-1.18-1.11-1.5-1.11-1.5-.9-.63.07-.62.07-.62 1 .07 1.53 1.05 1.53 1.05.89 1.56 2.34 1.11 2.91.85.09-.66.35-1.11.63-1.36-2.22-.26-4.55-1.14-4.55-5.06 0-1.12.39-2.03 1.03-2.75-.1-.26-.45-1.3.1-2.71 0 0 .84-.28 2.75 1.05a9.34 9.34 0 0 1 2.5-.34c.85 0 1.71.12 2.5.34 1.91-1.33 2.75-1.05 2.75-1.05.55 1.41.2 2.45.1 2.71.64.72 1.03 1.63 1.03 2.75 0 3.93-2.34 4.8-4.57 5.05.36.32.68.94.68 1.9 0 1.37-.01 2.48-.01 2.82 0 .27.18.6.69.49A10.02 10.02 0 0 0 22 12.25C22 6.58 17.52 2 12 2Z" />
+    </svg>
+  );
+}