diff --git a/frontend/package.json b/frontend/package.json
index 2db295a..1d7576b 100755
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -9,6 +9,7 @@
     "js-uuid": "0.0.6",
     "js-yaml": "^3.13.1",
     "linkstate": "^1.1.1",
+    "papaya-viewer": "^1.0.1449",
     "popper.js": "^1.16.1",
     "preact": "^8.2.9",
     "preact-router": "^2.6.1",
diff --git a/frontend/rollup.config.js b/frontend/rollup.config.js
index 87169dd..3711d93 100755
--- a/frontend/rollup.config.js
+++ b/frontend/rollup.config.js
@@ -51,6 +51,8 @@ export default {
       'node_modules/streamsaver/sw.js': 'dist/sw.js',
       'src/js/thirdparty/StreamSaver.js': 'dist/js/StreamSaver.js',
       'node_modules/web-streams-polyfill/dist/ponyfill.js': 'dist/js/web-streams-polyfill/ponyfill.js',
+      'node_modules/papaya-viewer/release/current/standard/papaya.js': 'dist/js/papaya.js',
+      'node_modules/papaya-viewer/release/current/standard/papaya.css': 'dist/css/papaya.css',
       verbose: true
     }),
     buble({jsx: 'h'}),
diff --git a/frontend/src/html/index.html b/frontend/src/html/index.html
index 5a01586..e7e1be6 100755
--- a/frontend/src/html/index.html
+++ b/frontend/src/html/index.html
@@ -4,6 +4,7 @@
     <link rel="stylesheet" type="text/css" href="/css/bootstrap.min.css" />
     <link rel="stylesheet" type="text/css" href="/css/all.min.css" />
     <link rel="stylesheet" type="text/css" href="/css/index.css" />
+    <link rel="stylesheet" type="text/css" href="/css/papaya.css" />
     <script language="javascript" src="/js/web-streams-polyfill/ponyfill.js"></script>
     <script language="javascript">
       window.process = { 'env': { 'NODE_ENV': 'production' } };
diff --git a/frontend/src/js/component/wb-collection-content.js b/frontend/src/js/component/wb-collection-content.js
index 05c3caa..3194e9e 100644
--- a/frontend/src/js/component/wb-collection-content.js
+++ b/frontend/src/js/component/wb-collection-content.js
@@ -138,6 +138,20 @@ class WBCollectionContent extends Component {
                 onclick={ () => {
                   alert('Not implemented.')
                 } }><i class="far fa-eye"></i></button>
+
+              { item[1].toLowerCase().endsWith('.nii') ? (
+                <button class="btn btn-outline-primary mx-1" title="View Image"
+                  onclick={ () => manifestWorker.postMessage([ 'getFile',
+                      '.' + collectionPath + '/' + item[1] ]).then(e => {
+                      const file = e.data[1];
+                      const blob = new Blob([
+                        JSON.stringify({ 'name': item[1], 'file': file })
+                      ]);
+                      const blocksBlobUrl = URL.createObjectURL(blob);
+                      window.open('/image-viewer/' + encodeURIComponent(blocksBlobUrl), '_blank');
+
+                    }) }><i class="far fa-eye"></i></button>
+              ) : null }
             </div>
           ) : null)
         ]
diff --git a/frontend/src/js/page/wb-app.js b/frontend/src/js/page/wb-app.js
index 7c9abfc..a59e65d 100644
--- a/frontend/src/js/page/wb-app.js
+++ b/frontend/src/js/page/wb-app.js
@@ -12,6 +12,7 @@ import WBUsersPage from 'wb-users-page';
 import WBWorkflowView from 'wb-workflow-view';
 import WBLaunchWorkflowPage from 'wb-launch-workflow-page';
 import WBDownloadPage from 'wb-download-page';
+import WBImageViewerPage from 'wb-image-viewer-page';
 import arvadosTypeName from 'arvados-type-name';
 
 class WBApp extends Component {
@@ -94,6 +95,8 @@ class WBApp extends Component {
         <WBLaunchWorkflowPage path="/workflow-launch/:workflowUuid" app={ this } />
 
         <WBDownloadPage path="/download/:blocksBlobUrl/:inline?" app={ this } />
+
+        <WBImageViewerPage path="/image-viewer/:blobUrl" app={ this } />
       </Router>
     );
   }
diff --git a/frontend/src/js/page/wb-image-viewer-page.js b/frontend/src/js/page/wb-image-viewer-page.js
new file mode 100644
index 0000000..1343630
--- /dev/null
+++ b/frontend/src/js/page/wb-image-viewer-page.js
@@ -0,0 +1,103 @@
+import { h, Component } from 'preact';
+import makeArvadosRequest from 'make-arvados-request';
+
+function downloadFile(arvHost, arvToken, file) {
+  const blockRefs = file[0];
+
+  let prom = makeArvadosRequest(arvHost, arvToken,
+    '/arvados/v1/keep_services');
+
+  let proxy;
+  prom = prom.then(xhr => {
+    const services = xhr.response['items'];
+    const proxies = services.filter(svc => (svc.service_type === 'proxy'));
+    const n = Math.floor(Math.random() * proxies.length);
+    proxy = proxies[n];
+  });
+
+  const blocks = [];
+
+  for (let i = 0; i < blockRefs.length; i++) {
+    let locator, start, end;
+
+    prom = prom.then(() => {
+      [ locator, start, end ] = blockRefs[i];
+      return makeArvadosRequest(
+        proxy.service_host + ':' + proxy.service_port,
+        arvToken, '/' + locator,
+        { 'useSsl': proxy.service_ssl_flag,
+          'responseType': 'arraybuffer' }
+      );
+    });
+
+    prom = prom.then(xhr => blocks.push(xhr.response.slice(start, end)));
+  }
+
+  prom = prom.then(() => {
+    const url = URL.createObjectURL(new Blob(blocks));
+    const totalSize = blocks.reduce((a, b) => a.length + b.length);
+    const big = new Uint8Array(totalSize);
+    for (let i = 0, pos = 0; i < blocks.length; i++) {
+      big.set(blocks[i], pos);
+      pos += blocks[i].length;
+    }
+    // papayaContainers[0].startPapaya();
+    const poll = () => {
+      setTimeout(() => {
+        console.log('Polling Papaya startup...')
+        if (true) { // window.papayaContainers && window.papayaContainers[0]) {
+          console.log('Great, Papaya started!');
+          papaya.Container.startPapaya();
+          //papaya.Container.addImage(0, big.buffer);
+          document.body.id = "bod";
+          document.body.style.background = "#555";
+          papaya.Container.addViewer("bod", {
+            'binaryImages': [ big.buffer ],
+            'noNewFiles': true,
+          });
+        } else
+          poll();
+      }, 1000);
+    };
+    //setTimeout(poll, 10000);
+    poll();
+  });
+}
+
+class WBImageViewerPage extends Component {
+  componentDidMount() {
+    const { blobUrl, app } = this.props;
+    const { arvHost, arvToken } = app.state;
+
+    let prom = new Promise((accept, reject) => {
+      const xhr = new XMLHttpRequest();
+      xhr.open('GET', blobUrl);
+      xhr.onreadystatechange = () => {
+        if (xhr.readyState !== 4) return;
+        if (xhr.status !== 200) reject(xhr);
+        else accept(xhr);
+      };
+      xhr.responseType = 'blob';
+      xhr.send();
+    });
+
+    prom = prom.then(xhr => xhr.response.text());
+
+    prom = prom.then(data => {
+      data = JSON.parse(data);
+      downloadFile(arvHost, arvToken, data.file);
+    });
+  }
+
+  render() {
+    return (
+      <div>
+        <script language="javascript" src="/js/papaya.js"></script>
+
+        <div id="papaya" style="width: auto; height: 100%; margin: 0;"></div>
+      </div>
+    );
+  }
+}
+
+export default WBImageViewerPage;