diff --git a/src/utils/io/read-file-options.ts b/src/utils/io/read-file-options.ts
new file mode 100644
index 0000000..eb04f04
--- /dev/null
+++ b/src/utils/io/read-file-options.ts
@@ -0,0 +1,32 @@
+import { readFileSync } from "node:fs";
+import { readFile } from "node:fs/promises";
+
+/**
+ * Options that can be used with `fs.readFile()` to read a file asynchronously.
+ */
+export type AsyncReadFileOptions = Parameters<typeof readFile>[1];
+
+/**
+ * Options that can be used with `fs.readFileSync()` to read a file synchronously.
+ */
+export type SyncReadFileOptions = Parameters<typeof readFileSync>[1];
+
+/**
+ * All possible options that can be passed to `fs.readFile()` and `fs.readFileSync()`.
+ */
+export type ReadFileOptions = AsyncReadFileOptions | SyncReadFileOptions;
+
+/**
+ * Object-style options that can be used with `fs.readFile()` to read a file asynchronously.
+ */
+export type AsyncReadFileOptionsObject = Exclude<AsyncReadFileOptions, string>;
+
+/**
+ * Object-style options that can be used with `fs.readFileSync()` to read a file synchronously.
+ */
+export type SyncReadFileOptionsObject = Exclude<SyncReadFileOptions, string>;
+
+/**
+ * All possible object-style options that can be passed to `fs.readFile()` and `fs.readFileSync()`.
+ */
+export type ReadFileOptionsObject = AsyncReadFileOptionsObject | SyncReadFileOptionsObject;