diff --git a/lib/build-tools/include-bytes.d.ts b/lib/build-tools/include-bytes.d.ts
new file mode 100644
index 000000000..d016f6f5e
--- /dev/null
+++ b/lib/build-tools/include-bytes.d.ts
@@ -0,0 +1,7 @@
+export default function _default({ types: t }: {
+    types: any;
+}): {
+    visitor: {
+        CallExpression(p: any, state: any): void;
+    };
+};
diff --git a/lib/build-tools/include-bytes.js b/lib/build-tools/include-bytes.js
new file mode 100644
index 000000000..265c42cd9
--- /dev/null
+++ b/lib/build-tools/include-bytes.js
@@ -0,0 +1,30 @@
+import fs from 'fs';
+import path from 'path';
+export default function ({ types: t }) {
+    return {
+        visitor: {
+            CallExpression(p, state) {
+                let name = p.node.callee.name;
+                let args = p.node.arguments;
+                if (name === 'includeBytes') {
+                    // Get the path of file
+                    var filename = this.file.opts.filename;
+                    // User settings
+                    let root = state.opts.root || path.dirname(filename);
+                    // Read binary file into bytes, so encoding is 'latin1' (each byte is 0-255, become one character)
+                    const encoding = 'latin1';
+                    // Require first arg to be string
+                    t.assertStringLiteral(args[0]);
+                    // Error if filename is not found
+                    if (filename === undefined || filename === 'unknown')
+                        throw new Error('`includeBytes` function called outside of file');
+                    // Generate and locate the file
+                    let fileRelPath = args[0].value; // Get literal string value
+                    let filePath = path.join(root, fileRelPath);
+                    let fileSrc = fs.readFileSync(filePath, { encoding }).toString(encoding);
+                    p.replaceWith(t.stringLiteral(fileSrc));
+                }
+            },
+        },
+    };
+}
diff --git a/src/build-tools/include-bytes.js b/src/build-tools/include-bytes.js
new file mode 100644
index 000000000..1eee0587e
--- /dev/null
+++ b/src/build-tools/include-bytes.js
@@ -0,0 +1,37 @@
+import fs from 'fs'
+import path from 'path'
+export default function ({ types: t }) {
+  return {
+    visitor: {
+      CallExpression(p, state) {
+        let name = p.node.callee.name
+        let args = p.node.arguments
+
+        if (name === 'includeBytes') {
+          // Get the path of file
+          var filename = this.file.opts.filename
+
+          // User settings
+          let root = state.opts.root || path.dirname(filename)
+
+          // Read binary file into bytes, so encoding is 'latin1' (each byte is 0-255, become one character)
+          const encoding = 'latin1'
+          
+          // Require first arg to be string
+          t.assertStringLiteral(args[0])
+
+          // Error if filename is not found
+          if (filename === undefined || filename === 'unknown')
+            throw new Error('`includeBytes` function called outside of file')
+
+          // Generate and locate the file
+          let fileRelPath = args[0].value // Get literal string value
+          let filePath = path.join(root, fileRelPath)
+          let fileSrc = fs.readFileSync(filePath, { encoding }).toString(encoding)
+
+          p.replaceWith(t.stringLiteral(fileSrc))
+        }
+      },
+    },
+  }
+}