diff --git a/__test__/index.spec.ts b/__test__/index.spec.ts
index 3148405..56f951b 100644
--- a/__test__/index.spec.ts
+++ b/__test__/index.spec.ts
@@ -11,6 +11,7 @@ import {
   hasRtf,
   hasText,
   setBuffer,
+  setContents,
   setHtml,
   setText,
   startWatch,
@@ -68,6 +69,30 @@ test.serial('setBuffer / getBuffer round-trips with custom format', async (t) =>
   t.deepEqual(Array.from(result), data)
 })
 
+// ── Multiple formats ─────────────────────────────────────────────────
+
+test.serial('setContents writes multiple clipboard representations at once', async (t) => {
+  const format = 'com.ava.test-set-contents'
+  const data = [0x48, 0x65, 0x6c, 0x6c, 0x6f]
+
+  await setContents({
+    text: 'hello',
+    html: '<p>hello</p>',
+    rtf: '{\\rtf1\\ansi hello}',
+    buffers: [{ format, buffer: data }],
+  })
+
+  t.is(await getText(), 'hello')
+  t.true(hasHtml())
+  t.true((await getHtml()).includes('hello'))
+  t.true(hasRtf())
+  t.deepEqual(Array.from(await getBuffer(format)), data)
+})
+
+test.serial('setContents rejects empty content', async (t) => {
+  await t.throwsAsync(() => setContents({}), { message: /contents is empty/ })
+})
+
 // ── Clear ────────────────────────────────────────────────────────────
 
 test.serial('clear removes clipboard content', async (t) => {
diff --git a/index.d.ts b/index.d.ts
index c514fa1..06e52d0 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -9,6 +9,18 @@ export declare function availableFormats(): Array<string>
 
 export declare function clear(): Promise<void>
 
+export interface ClipboardBufferContent {
+  format: string
+  buffer: Array<number>
+}
+
+export interface ClipboardContents {
+  text?: string
+  html?: string
+  rtf?: string
+  buffers?: Array<ClipboardBufferContent>
+}
+
 export declare function getBuffer(format: string): Promise<Array<number>>
 
 export declare function getFiles(): Promise<Array<string>>
@@ -35,6 +47,9 @@ export declare function hasText(): boolean
 
 export declare function setBuffer(format: string, buffer: Array<number>): Promise<void>
 
+/** Write multiple representations of the same clipboard content in a single operation. */
+export declare function setContents(contents: ClipboardContents): Promise<void>
+
 export declare function setFiles(files: Array<string>): Promise<void>
 
 export declare function setHtml(html: string): Promise<void>
diff --git a/index.js b/index.js
index fd95a3a..0cba697 100644
--- a/index.js
+++ b/index.js
@@ -592,6 +592,7 @@ module.exports.hasImage = nativeBinding.hasImage
 module.exports.hasRtf = nativeBinding.hasRtf
 module.exports.hasText = nativeBinding.hasText
 module.exports.setBuffer = nativeBinding.setBuffer
+module.exports.setContents = nativeBinding.setContents
 module.exports.setFiles = nativeBinding.setFiles
 module.exports.setHtml = nativeBinding.setHtml
 module.exports.setImageBase64 = nativeBinding.setImageBase64
diff --git a/src/lib.rs b/src/lib.rs
index 667152c..8eda540 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,8 +1,8 @@
 #![deny(clippy::all)]
 use base64::{engine::general_purpose, Engine as _};
 use clipboard_rs::{
-  common::RustImage, Clipboard, ClipboardContext, ClipboardHandler, ClipboardWatcher,
-  ClipboardWatcherContext, ContentFormat, RustImageData, WatcherShutdown,
+  common::RustImage, Clipboard, ClipboardContent, ClipboardContext, ClipboardHandler,
+  ClipboardWatcher, ClipboardWatcherContext, ContentFormat, RustImageData, WatcherShutdown,
 };
 use napi::bindgen_prelude::*;
 use napi::threadsafe_function::{ThreadsafeCallContext, ThreadsafeFunctionCallMode};
@@ -139,6 +139,53 @@ pub async fn set_buffer(format: String, buffer: Vec<u8>) -> Result<()> {
   ctx.set_buffer(&format, buffer).map_err(cb_err)
 }
 
+#[napi(object)]
+pub struct ClipboardBufferContent {
+  pub format: String,
+  pub buffer: Vec<u8>,
+}
+
+#[napi(object)]
+pub struct ClipboardContents {
+  pub text: Option<String>,
+  pub html: Option<String>,
+  pub rtf: Option<String>,
+  pub buffers: Option<Vec<ClipboardBufferContent>>,
+}
+
+/// Write multiple representations of the same clipboard content in a single operation.
+#[napi]
+pub async fn set_contents(contents: ClipboardContents) -> Result<()> {
+  let ctx = ClipboardContext::new().map_err(cb_err)?;
+  let mut clipboard_contents = Vec::new();
+
+  if let Some(text) = contents.text {
+    clipboard_contents.push(ClipboardContent::Text(text));
+  }
+  if let Some(html) = contents.html {
+    clipboard_contents.push(ClipboardContent::Html(html));
+  }
+  if let Some(rtf) = contents.rtf {
+    clipboard_contents.push(ClipboardContent::Rtf(rtf));
+  }
+  if let Some(buffers) = contents.buffers {
+    clipboard_contents.extend(
+      buffers
+        .into_iter()
+        .map(|entry| ClipboardContent::Other(entry.format, entry.buffer)),
+    );
+  }
+
+  if clipboard_contents.is_empty() {
+    return Err(Error::new(
+      Status::InvalidArg,
+      "contents is empty; use clear() to clear the clipboard",
+    ));
+  }
+
+  ctx.set(clipboard_contents).map_err(cb_err)
+}
+
 #[napi]
 pub async fn clear() -> Result<()> {
   let ctx = ClipboardContext::new().map_err(cb_err)?;