diff --git a/server-nodejs/docs/api-overview.md b/server-nodejs/docs/api-overview.md
index 08edeb7fc..44cae09e7 100644
--- a/server-nodejs/docs/api-overview.md
+++ b/server-nodejs/docs/api-overview.md
@@ -137,14 +137,12 @@ None.
 
 ### Request Query Parameters
 
-| Name           | Value       | 
-|----------------|-------------|
-| items          | dir/file id |
-| items          | dir/file id |
-| ...            | ...         |
-
-
-When multiple items, all _must_ be from the same folder.  Both folder and file ids are allowed in __items__ array.
+| Name           | Value         | Default | Comments                                                  |
+|----------------|---------------|---------|-----------------------------------------------------------|
+| preview        | true or false | false   | Applicable only when single *items* parameter is file ID  |
+| items          | dir/file id   | -       | Both folder and file ids are allowed as *items*           |
+| items          | dir/file id   | -       | When multiple *items*, all _must_ be from the same folder |
+| ...            | ...           | ...     |                                                           |
 
 ### Response
 
diff --git a/server-nodejs/router/download.js b/server-nodejs/router/download.js
index da43a4580..cb7c1d987 100644
--- a/server-nodejs/router/download.js
+++ b/server-nodejs/router/download.js
@@ -8,6 +8,7 @@ const { id2path } = require('./lib');
 
 module.exports = ({ options, req, res, handleError }) => {
   const ids = Array.isArray(req.query.items) ? req.query.items : [req.query.items];
+  const preview = req.query.preview === 'true';
   let reqPaths;
 
   try {
@@ -33,6 +34,8 @@ module.exports = ({ options, req, res, handleError }) => {
             }],
             filename: (absPaths[0] === options.fsRoot ? options.rootName : path.basename(absPaths[0])) + '.zip'
           });
+        } else if (preview) {
+          res.sendFile(absPaths[0]);
         } else {
           res.download(absPaths[0]);
         }