Add files (#3826)

docs/guides/binary/buffer-to-string.md

@@ -0,0 +1,25 @@
+---
+name: Convert a Buffer to a string
+---
+
+The [`Buffer`](https://nodejs.org/api/buffer.html) class provides a built-in `.toString()` method that converts a `Buffer` to a string.
+
+```ts
+const buf = Buffer.from("hello");
+const str = buf.toString();
+// => "hello"
+```
+
+---
+
+You can optionally specify an encoding and byte range.
+
+```ts
+const buf = Buffer.from("hello world!");
+const str = buf.toString("utf8", 0, 5);
+// => "hello"
+```
+
+---
+
+See [Docs > API > Binary Data](/docs/api/binary-data#conversion) for complete documentation on manipulating binary data with Bun.