diff --git a/Atbash.ts b/Atbash.ts
new file mode 100644
index 0000000..5dac655
--- /dev/null
+++ b/Atbash.ts
@@ -0,0 +1,51 @@
+import {Coder} from "./Coder";
+
+export class AtbashEncoder implements Coder {
+    from: string;
+    to: string;
+
+    constructor() {
+        this.from = "text";
+        this.to = "atbash";
+    }
+
+    atbash(txt: string) {
+        return txt.replace(/[a-z]/gi, c =>
+            "ZYXWVUTSRQPONMLKJIHGFEDCBAzyxwvutsrqponmlkjihgfedcba"
+            ["ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".indexOf(c)]);
+    }
+
+    transform(text: string): string {
+        return this.atbash(text);
+    }
+
+    checkInput(text: string): boolean {
+        // For now, we assume that all text is valid. We will only encode A-Z and a-z. The rest will be left as is.
+        return true;
+    }
+}
+
+export class AtbashDecoder implements Coder {
+    from: string;
+    to: string;
+
+    constructor() {
+        this.from = "atbash";
+        this.to = "text";
+    }
+
+    deatbash(txt: string) {
+        return txt.replace(/[a-z]/gi, c =>
+            "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+            ["ZYXWVUTSRQPONMLKJIHGFEDCBAzyxwvutsrqponmlkjihgfedcba".indexOf(c)]);
+    }
+
+    transform(text: string): string {
+        return this.deatbash(text);
+    }
+
+    checkInput(text: string): boolean {
+        // For now, we assume that all text is valid. We will only encode A-Z and a-z. The rest will be left as is.
+        return true;
+    }
+}
\ No newline at end of file
diff --git a/main.ts b/main.ts
index 1579c04..15f4f9f 100644
--- a/main.ts
+++ b/main.ts
@@ -3,17 +3,22 @@ import { App, MarkdownView, Plugin, MarkdownPostProcessorContext, PluginSettingT
 import { Coder } from "./Coder";
 import { Base64Encoder, Base64Decoder } from "./Base64";
 import { Rot13Encoder, Rot13Decoder } from "./Rot13";
+import { AtbashEncoder, AtbashDecoder } from "./Atbash";
 
 export default class CoderPlugin extends Plugin {
 
 	// List of coders
-	coders: Coder[] = [new Base64Encoder(), new Base64Decoder(), new Rot13Encoder(), new Rot13Decoder()];
+	coders: Coder[] = [new Base64Encoder(), new Base64Decoder(), new Rot13Encoder(), new Rot13Decoder(), new AtbashEncoder(), new AtbashDecoder()];
 
 	async onload() {
 		this.registerMarkdownCodeBlockProcessor('transform-text-base64', this.processTextToBase64);
 		this.registerMarkdownCodeBlockProcessor('transform-base64-text', this.processBase64ToText);
 		this.registerMarkdownCodeBlockProcessor('transform-text-rot13', this.processTextToRot13);
 		this.registerMarkdownCodeBlockProcessor('transform-rot13-text', this.processRot13ToText);
+		this.registerMarkdownCodeBlockProcessor('transform-text-atbash',this.processTextToAtbash);
+		this.registerMarkdownCodeBlockProcessor('transform-atbash-text',this.processAtbashToText);
+		
+
 	}
 
 	// function to get a coder by from and to types
@@ -50,6 +55,16 @@ export default class CoderPlugin extends Plugin {
 		this.processText(content, el, coder);
 	}
 
+	processTextToAtbash = async (content: string, el: HTMLElement, ctx: MarkdownPostProcessorContext) => {
+		let coder = this.getCoder("text", "atbash");
+		this.processText(content, el, coder);
+	}
+
+	processAtbashToText = async (content: string, el: HTMLElement, ctx: MarkdownPostProcessorContext) => {
+		let coder = this.getCoder("atbash", "text");
+		this.processText(content, el, coder);
+	}
+
 	processText(content: string, el: HTMLElement, coder: Coder|null) {
 		var destination;
 
diff --git a/manifest.json b/manifest.json
index 34131aa..233148b 100644
--- a/manifest.json
+++ b/manifest.json
@@ -3,7 +3,7 @@
 	"name": "Encoder/Decoder",
 	"version": "1.2.0",
 	"minAppVersion": "0.15.0",
-	"description": "Converts texts into other formats (base64, ROT13) and vice versa",
+	"description": "Converts texts into other formats (base64, ROT13, atbash) and vice versa",
 	"author": "Rudi Häusler",
 	"isDesktopOnly": false
 }
diff --git a/package.json b/package.json
index c0f5ee4..559f12f 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
 	"name": "coder",
 	"version": "1.1.0",
-	"description": "Converts text into other formats (base64, ROT13)",
+	"description": "Converts text into other formats (base64, ROT13, atbash)",
 	"main": "main.js",
 	"scripts": {
 		"dev": "node esbuild.config.mjs",