diff --git a/Whatsapp_Chat_Exporter/utility.py b/Whatsapp_Chat_Exporter/utility.py
index 5d52d2d..268247a 100644
--- a/Whatsapp_Chat_Exporter/utility.py
+++ b/Whatsapp_Chat_Exporter/utility.py
@@ -85,8 +85,8 @@ def bytes_to_readable(size_bytes: int) -> str:
     Returns:
         A human-readable string representing the file size.
     """
-    if size_bytes == 0:
-        return "0B"
+    if size_bytes < 1024:
+        return f"{size_bytes} B"
     size_name = ("B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB")
     i = int(math.floor(math.log(size_bytes, 1024)))
     p = math.pow(1024, i)
diff --git a/tests/test_utility.py b/tests/test_utility.py
index 1e9012d..6a7c326 100644
--- a/tests/test_utility.py
+++ b/tests/test_utility.py
@@ -23,8 +23,8 @@ def test_convert_time_unit():
 
 
 class TestBytesToReadable:
-    assert bytes_to_readable(0) == "0B"
-    assert bytes_to_readable(500) == "500.0 B"
+    assert bytes_to_readable(0) == "0 B"
+    assert bytes_to_readable(500) == "500 B"
     assert bytes_to_readable(1024) == "1.0 KB"
     assert bytes_to_readable(2048) == "2.0 KB"
     assert bytes_to_readable(1536) == "1.5 KB"
@@ -40,6 +40,7 @@ class TestBytesToReadable:
 
 class TestReadableToBytes:
     def test_conversion(self):
+        assert readable_to_bytes("0B") == 0
         assert readable_to_bytes("100B") == 100
         assert readable_to_bytes("50 B") == 50
         assert readable_to_bytes("1KB") == 1024