diff --git a/docs/source/api_doc/utils/data.rst b/docs/source/api_doc/utils/data.rst
new file mode 100644
index 0000000000..e1a70e98cc
--- /dev/null
+++ b/docs/source/api_doc/utils/data.rst
@@ -0,0 +1,15 @@
+hfutils.utils.data
+=================================
+
+.. currentmodule:: hfutils.utils.data
+
+.. automodule:: hfutils.utils.data
+
+
+is_data_file
+---------------------------
+
+.. autofunction:: is_data_file
+
+
+
diff --git a/docs/source/api_doc/utils/index.rst b/docs/source/api_doc/utils/index.rst
index cb0aef8cc5..088c55876a 100644
--- a/docs/source/api_doc/utils/index.rst
+++ b/docs/source/api_doc/utils/index.rst
@@ -11,7 +11,9 @@ hfutils.utils
 
     archive
     binary
+    data
     download
+    model
     number
     path
     session
diff --git a/docs/source/api_doc/utils/model.rst b/docs/source/api_doc/utils/model.rst
new file mode 100644
index 0000000000..df369a25a1
--- /dev/null
+++ b/docs/source/api_doc/utils/model.rst
@@ -0,0 +1,15 @@
+hfutils.utils.model
+=================================
+
+.. currentmodule:: hfutils.utils.model
+
+.. automodule:: hfutils.utils.model
+
+
+is_model_file
+---------------------------
+
+.. autofunction:: is_model_file
+
+
+
diff --git a/hfutils/utils/data.py b/hfutils/utils/data.py
index cf36bd9e79..ec7e57339b 100644
--- a/hfutils/utils/data.py
+++ b/hfutils/utils/data.py
@@ -1,3 +1,11 @@
+"""
+This module provides functionality for identifying data files based on their file extensions.
+
+It includes a comprehensive set of data file extensions and a function to check if a given
+filename corresponds to a known data file format. This can be useful in various data processing
+and file handling scenarios where it's necessary to distinguish data files from other types of files.
+"""
+
 import os
 from typing import Union
 
@@ -44,6 +52,32 @@
 
 
 def is_data_file(filename: Union[str, os.PathLike]) -> bool:
+    """
+    Determine if a given filename corresponds to a known data file format.
+
+    This function checks if the file extension of the provided filename matches
+    any of the known data file extensions defined in the `_DATA_EXTS` set.
+
+    :param filename: The name of the file to check. Can be a string or a path-like object.
+    :type filename: Union[str, os.PathLike]
+
+    :return: True if the file extension matches a known data file format, False otherwise.
+    :rtype: bool
+
+    :raises TypeError: If the provided filename is not a string or path-like object.
+
+    Usage:
+        >>> is_data_file('data.csv')
+        True
+        >>> is_data_file('script.py')
+        False
+        >>> is_data_file(Path('/path/to/data.json'))
+        True
+
+    .. note::
+        The function is case-insensitive and works with both file names and full paths.
+        It normalizes the filename and extracts only the extension for comparison.
+    """
     if not isinstance(filename, (str, os.PathLike)):
         raise TypeError(f'Unknown file name type - {filename!r}')
 
diff --git a/hfutils/utils/model.py b/hfutils/utils/model.py
index ca28bf0cd2..5d60312b20 100644
--- a/hfutils/utils/model.py
+++ b/hfutils/utils/model.py
@@ -1,3 +1,28 @@
+"""
+This module provides functionality for identifying model files based on their extensions and naming patterns.
+
+It includes a comprehensive list of model file extensions, patterns for sharded model files, and specific patterns
+for Hugging Face model files. The main function, :func:`is_model_file`, determines whether a given filename corresponds
+to a model file based on these predefined patterns and extensions.
+
+This module can be useful in various scenarios, such as:
+
+- Automated model file detection in directories
+- Validation of uploaded files in machine learning platforms
+- Preprocessing steps in model loading pipelines
+
+Usage:
+    .. code:: python
+
+        from model_file_identifier import is_model_file
+
+        filename = "model.pt"
+        if is_model_file(filename):
+            print(f"{filename} is a model file")
+        else:
+            print(f"{filename} is not a model file")
+"""
+
 import os
 import re
 from typing import Union
@@ -74,6 +99,33 @@
 
 
 def is_model_file(filename: Union[str, os.PathLike]) -> bool:
+    """
+    Determine if a given filename corresponds to a model file.
+
+    This function checks if the provided filename matches any of the known model file extensions
+    or patterns, including sharded model files and Hugging Face specific patterns.
+
+    :param filename: The name of the file to check. Can be a full path or just the filename.
+    :type filename: Union[str, os.PathLike]
+
+    :return: True if the filename corresponds to a model file, False otherwise.
+    :rtype: bool
+
+    :raises TypeError: If the filename is not a string or os.PathLike object.
+
+    Usage:
+        >>> is_model_file("model.pt")
+        True
+        >>> is_model_file("data.csv")
+        False
+        >>> is_model_file("model-00001-of-00005")
+        True
+        >>> is_model_file("pytorch_model.bin")
+        True
+
+    .. note::
+        This function is case-insensitive and works with both file names and full paths.
+    """
     if not isinstance(filename, (str, os.PathLike)):
         raise TypeError(f'Unknown file name type - {filename!r}')
     filename = os.path.basename(os.path.normcase(str(filename)))