diff --git a/examples/reference/widgets/FloatInput.ipynb b/examples/reference/widgets/FloatInput.ipynb
new file mode 100644
index 00000000000..552cce7eb63
--- /dev/null
+++ b/examples/reference/widgets/FloatInput.ipynb
@@ -0,0 +1,113 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import panel as pn\n",
+    "pn.extension()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "The ``FloatInput`` widget allows entering any floating point value using a text entry box whose contents are then converted to a Python float. The widget only supports floats.\n",
+    "\n",
+    "For more information about listening to widget events and laying out widgets refer to the [widgets user guide](../../user_guide/Widgets.ipynb). Alternatively you can learn how to build GUIs by declaring parameters independently of any specific widgets in the [param user guide](../../user_guide/Param.ipynb). To express interactivity entirely using Javascript without the need for a Python server take a look at the [links user guide](../../user_guide/Param.ipynb).\n",
+    "\n",
+    "#### Parameters:\n",
+    "\n",
+    "For layout and styling related parameters see the [customization user guide](../../user_guide/Customization.ipynb).\n",
+    "\n",
+    "##### Core\n",
+    "\n",
+    "* **``value``** (float): Float value\n",
+    "* **``format``** (string): Optional format to convert the float value in string, see : http://numbrojs.com/old-format.html\n",
+    "\n",
+    "\n",
+    "##### Display\n",
+    "\n",
+    "* **``disabled``** (boolean): Whether the widget is editable\n",
+    "* **``name``** (str): The title of the widget\n",
+    "* **``placeholder``** (str): A placeholder string displayed when no value is entered\n",
+    "\n",
+    "___"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "float_input = pn.widgets.IntInput(name='Integer Input', value=None, placeholder='Enter an integer', format=\"0 $\")\n",
+    "float_input"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "``IntInput.value`` returns the value of the widget"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "int_input.value"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Controls\n",
+    "\n",
+    "The `IntInput` widget exposes a number of options which can be changed from both Python and Javascript. Try out the effect of these parameters interactively:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "pn.Row(int_input.controls(jslink=True), int_input)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.5"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}
diff --git a/examples/reference/widgets/FloatSpinner.ipynb b/examples/reference/widgets/FloatSpinner.ipynb
index 27867b01754..56dfebb57a6 100644
--- a/examples/reference/widgets/FloatSpinner.ipynb
+++ b/examples/reference/widgets/FloatSpinner.ipynb
@@ -30,13 +30,16 @@
     "* **``step``** (float): The step added or subtracted to the current value on each click\n",
     "* **``start``** (float): Optional minimum allowable value\n",
     "* **``end``** (float): Optional maximum allowable value\n",
-    "* **``format``** (string): Optional format to convert the float value in string, see : http://numbrojs.com/old-format.html\n",
+    "* **``format``** (str): Optional format to convert the float value in string, see : http://numbrojs.com/old-format.html\n",
     "* **``page_step_multiplier``** (int): Defines the multiplication factor applied to step when the page up and page down keys are pressed.\n",
     "\n",
     "##### Display\n",
     "\n",
     "* **``disabled``** (boolean): Whether the widget is editable\n",
-    "* **``name``** (str): The title of the widget"
+    "* **``name``** (str): The title of the widget\n",
+    "* **``placeholder``** (str): A placeholder string displayed when no value is entered\n",
+    "\n",
+    "___"
    ]
   },
   {
@@ -93,9 +96,22 @@
   }
  ],
  "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
   "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
    "name": "python",
-   "pygments_lexer": "ipython3"
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.5"
   }
  },
  "nbformat": 4,
diff --git a/examples/reference/widgets/IntInput.ipynb b/examples/reference/widgets/IntInput.ipynb
new file mode 100644
index 00000000000..bd4ffacf88e
--- /dev/null
+++ b/examples/reference/widgets/IntInput.ipynb
@@ -0,0 +1,113 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import panel as pn\n",
+    "pn.extension()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "The ``IntInput`` widget allows entering any integer value using a text entry box whose contents are then converted to an integer. The widget only supports integers.\n",
+    "\n",
+    "For more information about listening to widget events and laying out widgets refer to the [widgets user guide](../../user_guide/Widgets.ipynb). Alternatively you can learn how to build GUIs by declaring parameters independently of any specific widgets in the [param user guide](../../user_guide/Param.ipynb). To express interactivity entirely using Javascript without the need for a Python server take a look at the [links user guide](../../user_guide/Param.ipynb).\n",
+    "\n",
+    "#### Parameters:\n",
+    "\n",
+    "For layout and styling related parameters see the [customization user guide](../../user_guide/Customization.ipynb).\n",
+    "\n",
+    "##### Core\n",
+    "\n",
+    "* **``value``** (int): Integer value\n",
+    "* **``format``** (string): Optional format to convert the integer value in string, see : http://numbrojs.com/old-format.html\n",
+    "\n",
+    "\n",
+    "##### Display\n",
+    "\n",
+    "* **``disabled``** (boolean): Whether the widget is editable\n",
+    "* **``name``** (str): The title of the widget\n",
+    "* **``placeholder``** (str): A placeholder string displayed when no value is entered\n",
+    "\n",
+    "___"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "int_input = pn.widgets.IntInput(name='Integer Input', value=None, placeholder='Enter an integer', format=\"0 $\")\n",
+    "int_input"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "``IntInput.value`` returns the value of the widget"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "int_input.value"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Controls\n",
+    "\n",
+    "The `IntInput` widget exposes a number of options which can be changed from both Python and Javascript. Try out the effect of these parameters interactively:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "pn.Row(int_input.controls(jslink=True), int_input)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.5"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}
diff --git a/examples/reference/widgets/IntSpinner.ipynb b/examples/reference/widgets/IntSpinner.ipynb
index 6202e0be0a5..1d194cdc9e1 100644
--- a/examples/reference/widgets/IntSpinner.ipynb
+++ b/examples/reference/widgets/IntSpinner.ipynb
@@ -30,13 +30,16 @@
     "* **``step``** (int): The step added or subtracted to the current value on each click\n",
     "* **``start``** (int): Optional minimum allowable value\n",
     "* **``end``** (int): Optional maximum allowable value\n",
-    "* **``format``** (string): Optional format to convert the float value in string, see : http://numbrojs.com/old-format.html\n",
+    "* **``format``** (str): Optional format to convert the float value in string, see : http://numbrojs.com/old-format.html\n",
     "* **``page_step_multiplier``** (int): Defines the multiplication factor applied to step when the page up and page down keys are pressed.\n",
     "\n",
     "##### Display\n",
     "\n",
     "* **``disabled``** (boolean): Whether the widget is editable\n",
-    "* **``name``** (str): The title of the widget"
+    "* **``name``** (str): The title of the widget\n",
+    "* **``placeholder``** (str): A placeholder string displayed when no value is entered\n",
+    "\n",
+    "___"
    ]
   },
   {
@@ -93,9 +96,22 @@
   }
  ],
  "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
   "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
    "name": "python",
-   "pygments_lexer": "ipython3"
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.5"
   }
  },
  "nbformat": 4,
diff --git a/panel/widgets/input.py b/panel/widgets/input.py
index ce95d09e0a1..3b6edaadd0e 100644
--- a/panel/widgets/input.py
+++ b/panel/widgets/input.py
@@ -166,7 +166,8 @@ class _NumericInputBase(Widget):
     value = param.Number(default=0, allow_None=True, doc="""
         The initial value of the spinner.""")
 
-    placeholder = param.String(default='0')
+    placeholder = param.String(default='0', doc="""
+        Placeholder for empty input field.""")
 
     format = param.String(default=None, allow_None=True, doc="""
         Number formating : http://numbrojs.com/old-format.html .""")