diff --git a/apps/deno/tests/test1.ts b/apps/deno/tests/test1.ts
index 42e423b78..ec80625d0 100644
--- a/apps/deno/tests/test1.ts
+++ b/apps/deno/tests/test1.ts
@@ -67,6 +67,11 @@ export default async (assets: Assets) => {
 
   const size = 750;
 
+  pdfDoc.addJavascript(
+    'main',
+    'console.show(); console.println("Hello World!")',
+  );
+
   /********************** Page 1 **********************/
 
   // This page tests different drawing operations as well as adding custom
diff --git a/apps/node/tests/test1.ts b/apps/node/tests/test1.ts
index 01d60a1b8..35ab26c27 100644
--- a/apps/node/tests/test1.ts
+++ b/apps/node/tests/test1.ts
@@ -67,6 +67,11 @@ export default async (assets: Assets) => {
 
   const size = 750;
 
+  pdfDoc.addJavascript(
+    'main',
+    'console.show(); console.println("Hello World!")',
+  );
+
   /********************** Page 1 **********************/
 
   // This page tests different drawing operations as well as adding custom
diff --git a/apps/rn/src/tests/test1.js b/apps/rn/src/tests/test1.js
index 3ded89aa6..be1a50128 100644
--- a/apps/rn/src/tests/test1.js
+++ b/apps/rn/src/tests/test1.js
@@ -72,6 +72,11 @@ export default async () => {
 
   const size = 750;
 
+  pdfDoc.addJavascript(
+    'main',
+    'console.show(); console.println("Hello World!")',
+  );
+
   /********************** Page 1 **********************/
 
   // This page tests different drawing operations as well as adding custom
diff --git a/apps/web/test1.html b/apps/web/test1.html
index f0ef47c43..d739b21d9 100644
--- a/apps/web/test1.html
+++ b/apps/web/test1.html
@@ -120,6 +120,11 @@
 
       const size = 750;
 
+      pdfDoc.addJavascript(
+        'main',
+        'console.show(); console.println("Hello World!")',
+      );
+
       /********************** Page 1 **********************/
 
       // This page tests different drawing operations as well as adding custom
diff --git a/src/api/PDFDocument.ts b/src/api/PDFDocument.ts
index 646addfc0..c9c525643 100644
--- a/src/api/PDFDocument.ts
+++ b/src/api/PDFDocument.ts
@@ -61,6 +61,7 @@ import {
 } from 'src/utils';
 import FileEmbedder from 'src/core/embedders/FileEmbedder';
 import PDFEmbeddedFile from 'src/api/PDFEmbeddedFile';
+import PDFArray from 'src/core/objects/PDFArray';
 
 /**
  * Represents a PDF document.
@@ -713,6 +714,44 @@ export default class PDFDocument {
     return copiedPages;
   }
 
+  /**
+   * Add document JavaScript. The script is executed when the document is opened.
+   * See the [JavaScript™ for Acrobat® API Reference](https://www.adobe.com/content/dam/acom/en/devnet/acrobat/pdfs/js_api_reference.pdf)
+   * for details. For example:
+   *
+   * ```js
+   * pdfDoc.addJavascript('main', 'console.show(); console.println("Hello World")');
+   * ```
+   * @param name The name of the script. Must be unique per document.
+   * @param script The JavaScript to execute.
+   */
+  addJavascript(name: string, script: string) {
+    const jsActionDict = this.context.obj({
+      Type: 'Action',
+      S: 'JavaScript',
+      JS: PDFHexString.fromText(script),
+    });
+
+    const jsActionRef = this.context.register(jsActionDict);
+    if (!this.catalog.has(PDFName.of('Names'))) {
+      this.catalog.set(PDFName.of('Names'), PDFDict.withContext(this.context));
+    }
+
+    const Names = this.catalog.lookup(PDFName.of('Names'), PDFDict);
+    if (!Names.has(PDFName.of('JavaScript'))) {
+      Names.set(PDFName.of('JavaScript'), this.context.obj({}));
+    }
+
+    const Javascript = Names.lookup(PDFName.of('JavaScript'), PDFDict);
+    if (!Javascript.has(PDFName.of('Names'))) {
+      Javascript.set(PDFName.of('Names'), this.context.obj([]));
+    }
+
+    const JSNames = Javascript.lookup(PDFName.of('Names'), PDFArray);
+    JSNames.push(PDFName.of(name));
+    JSNames.push(jsActionRef);
+  }
+
   /**
    * Add an attachment to this document. Attachments are visible in the
    * "Attachments" panel of Adobe Acrobat and some other PDF readers. Any
diff --git a/tests/api/PDFDocument.spec.ts b/tests/api/PDFDocument.spec.ts
index 2d88d6515..4524685e5 100644
--- a/tests/api/PDFDocument.spec.ts
+++ b/tests/api/PDFDocument.spec.ts
@@ -3,6 +3,8 @@ import fs from 'fs';
 import {
   EncryptedPDFError,
   ParseSpeeds,
+  PDFArray,
+  PDFDict,
   PDFDocument,
   PDFName,
   PDFPage,
@@ -299,4 +301,34 @@ describe(`PDFDocument`, () => {
       );
     });
   });
+  describe(`addJavascript method`, () => {
+    it(`adds the script to the catalog`, async () => {
+      const pdfDoc = await PDFDocument.create();
+      pdfDoc.addJavascript(
+        'main',
+        'console.show(); console.println("Hello World"',
+      );
+      expect(pdfDoc.catalog.has(PDFName.of('Names')));
+      const Names = pdfDoc.catalog.lookup(PDFName.of('Names'), PDFDict);
+      expect(Names.has(PDFName.of('JavaScript')));
+      const Javascript = Names.lookup(PDFName.of('JavaScript'), PDFDict);
+      expect(Javascript.has(PDFName.of('Names')));
+      const JSNames = Javascript.lookup(PDFName.of('Names'), PDFArray);
+      expect(JSNames.get(0)).toBe(PDFName.of('main'));
+    });
+
+    it(`does not overwrite scripts`, async () => {
+      const pdfDoc = await PDFDocument.create();
+      pdfDoc.addJavascript('first', 'console.show(); console.println("First"');
+      pdfDoc.addJavascript(
+        'second',
+        'console.show(); console.println("Second"',
+      );
+      const Names = pdfDoc.catalog.lookup(PDFName.of('Names'), PDFDict);
+      const Javascript = Names.lookup(PDFName.of('JavaScript'), PDFDict);
+      const JSNames = Javascript.lookup(PDFName.of('Names'), PDFArray);
+      expect(JSNames.get(0)).toBe(PDFName.of('first'));
+      expect(JSNames.get(2)).toBe(PDFName.of('second'));
+    });
+  });
 });