diff --git a/bin/generate-document b/bin/generate-document
new file mode 100755
index 00000000..a68a1361
--- /dev/null
+++ b/bin/generate-document
@@ -0,0 +1,14 @@
+#!/usr/bin/env php
+<?php
+
+use PhpOffice\PhpSpreadsheet\DocumentGenerator;
+
+require_once __DIR__ . '/../src/Bootstrap.php';
+
+try {
+    DocumentGenerator::generateFunctionListByCategory();
+    DocumentGenerator::generateFunctionListByName();
+} catch (ReflectionException $e) {
+    fwrite(STDERR, (string)$e);
+    exit(1);
+}
diff --git a/src/PhpSpreadsheet/DocumentGenerator.php b/src/PhpSpreadsheet/DocumentGenerator.php
new file mode 100644
index 00000000..010d1325
--- /dev/null
+++ b/src/PhpSpreadsheet/DocumentGenerator.php
@@ -0,0 +1,102 @@
+<?php
+
+
+namespace PhpOffice\PhpSpreadsheet;
+
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Category;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use ReflectionClass;
+use ReflectionException;
+use UnexpectedValueException;
+
+class DocumentGenerator {
+    /**
+     * @throws ReflectionException
+     */
+    public static function generateFunctionListByCategory(): void {
+        ob_start();
+        try {
+            echo "# Function list by category\n";
+            $phpSpreadsheetFunctions = self::getPhpSpreadsheetFunctions();
+            foreach (self::getCategories() as $categoryConstant => $category) {
+                echo "\n";
+                echo "## {$categoryConstant}\n";
+                echo "\n";
+                echo "Excel Function      | PhpSpreadsheet Function\n";
+                echo "--------------------|-------------------------------------------\n";
+                foreach ($phpSpreadsheetFunctions as $function => $functionInfo) {
+                    if ($category === $functionInfo['category']) {
+                        echo str_pad($function, 20)
+                            . '| ' . self::getPhpSpreadsheetFunctionText($functionInfo['functionCall']) . "\n";
+                    }
+                }
+            }
+        } finally {
+            file_put_contents(__DIR__ . '/../../docs/references/function-list-by-category.md', ob_get_clean());
+        }
+    }
+
+    /**
+     * @return mixed
+     * @throws ReflectionException
+     */
+    private static function getPhpSpreadsheetFunctions() {
+        $phpSpreadsheetFunctionsProperty = (new ReflectionClass(Calculation::class))->getProperty('phpSpreadsheetFunctions');
+        $phpSpreadsheetFunctionsProperty->setAccessible(true);
+        $phpSpreadsheetFunctions = $phpSpreadsheetFunctionsProperty->getValue();
+        ksort($phpSpreadsheetFunctions);
+        return $phpSpreadsheetFunctions;
+    }
+
+    /**
+     * @return array
+     * @throws ReflectionException
+     */
+    private static function getCategories(): array {
+        return (new ReflectionClass(Category::class))->getConstants();
+    }
+
+    private static function getPhpSpreadsheetFunctionText($functionCall): string {
+        if (is_string($functionCall)) {
+            return $functionCall;
+        }
+        if ($functionCall === [Functions::class, 'DUMMY']) {
+            return '**Not yet Implemented**';
+        }
+        if (is_array($functionCall)) {
+            return "\\{$functionCall[0]}::{$functionCall[1]}";
+        }
+        throw new UnexpectedValueException('$functionCall is of type ' . gettype($functionCall) . '. string or array expected');
+    }
+
+    /**
+     * @throws ReflectionException
+     */
+    public static function generateFunctionListByName(): void {
+        $categoryConstants = array_flip(self::getCategories());
+        ob_start();
+        try {
+            echo "# Function list by name\n";
+            $phpSpreadsheetFunctions = self::getPhpSpreadsheetFunctions();
+            $lastAlphabet = null;
+            foreach ($phpSpreadsheetFunctions as $function => $functionInfo) {
+                if ($lastAlphabet !== $function[0]) {
+                    $lastAlphabet = $function[0];
+                    echo "\n";
+                    echo "## {$lastAlphabet}\n";
+                    echo "\n";
+                    echo "Excel Function      | Category                       | PhpSpreadsheet Function\n";
+                    echo "--------------------|--------------------------------|-------------------------------------------\n";
+                }
+                echo str_pad($function, 20)
+                    . '| ' . str_pad($categoryConstants[$functionInfo['category']], 31)
+                    . '| ' . self::getPhpSpreadsheetFunctionText($functionInfo['functionCall'])
+                    . "\n";
+            }
+        } finally {
+            file_put_contents(__DIR__ . '/../../docs/references/function-list-by-name.md', ob_get_clean());
+        }
+    }
+}
\ No newline at end of file