diff --git a/Caesar-Cipher.ts b/Caesar-Cipher.ts
new file mode 100644
index 0000000..39b0bd3
--- /dev/null
+++ b/Caesar-Cipher.ts
@@ -0,0 +1,63 @@
+/**
+ * @file Class realize Caesar encryption metods.
+ * @class caesarCipher
+ * @author DemonWayne <80221813+DemonWayne@users.noreply.github.com>
+ * @version 0.0.1
+ */
+export default class caesarCipher {
+  /**
+   * Encode input data by Caesar Cipher.
+   * @name encode
+   */
+  public encode(rawData: inputDataType, key = 1): string | undefined {
+    const data = this.inputProcessing(rawData);
+    if (!data || !data.length) return;
+
+    key = key > 1 ? this.keyProcessing(key) : key;
+
+    return data.map(el => String.fromCharCode(el.charCodeAt(0) + key)).join('');
+  }
+
+  /**
+   * Decode input data by Caesar Cipher.
+   * @name decode
+   */
+  public decode(rawData: inputDataType, key = 1): string | undefined {
+    const data = this.inputProcessing(rawData);
+    if (!data || !data.length) return;
+
+    key = key > 1 ? this.keyProcessing(key) : key;
+
+    return data.map(el => String.fromCharCode(el.charCodeAt(0) - key)).join('');
+  }
+
+  /**
+   * Convert input data to array.
+   * @name inputProcessing
+   */
+  private inputProcessing(rawData: inputDataType): Array<string> | undefined {
+    const input = typeof rawData === 'object' ? rawData.value : rawData;
+    return typeof input === 'string' || typeof input === 'number' ? `${input}`.split('') : undefined;
+  }
+
+  /**
+   * Convert input key to number.
+   * @name keyProcessing
+   */
+  private keyProcessing(key: keyProcessingType): number {
+    if (typeof key === 'object' && 'value' in key) return key.value;
+    return Array.isArray(key) ? key[0] : +key;
+  }
+}
+
+interface keyProcessingObject {
+  value: number;
+}
+
+interface inputProcessingObject {
+  value: string;
+}
+
+type inputDataType = string | number | inputProcessingObject;
+
+type keyProcessingType = string | number | keyProcessingObject | Array<number>;