The show() function of the downloads API shows the downloaded file in its containing folder in the underlying platform's file manager.

This is an asynchronous function that returns a Promise.


var showing =
  downloadId             // integer


An integer representing the ID of the DownloadItem to show.

Return value

A Promise. If the request succeeds, the promise will be fulfilled with no arguments. If the request fails, the promise will be rejected with an error message.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxOperaFirefox for Android
showChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android Full support 48


Full support  
Full support
No support  
No support


This example shows the most recently downloaded item:

function onShowing(success) {
  console.log(`Showing download item: ${success}`);

function onError(error) {
  console.log(`Error opening item: ${error}`);

function openDownload(downloadItems) {
    if (downloadItems.length > 0) {
      latestDownloadId = downloadItems[0].id;
      var showing =;
      showing.then(onShowing, onError);

var searching ={
  limit: 1,
  orderBy: ["-startTime"]

searching.then(openDownload, onError);


This API is based on Chromium's chrome.downloads API.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

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