Question: I need to show a picture on web page without uploading it. something like

```
 <img id="RuPic" src="file://localhost/D:/folder/image.jpg"/>

```

How to do that?

Answer: 
You can do that easily using `FileReader.readAsDataURL()`. The user chooses an image and you can display it without needing to upload it.

For more info see <https://developer.mozilla.org/en-US/docs/Web/API/FileReader/readAsDataURL>

Here is the code:

```js
function previewFile() {
    // Where you will display your image
    var preview = document.querySelector('img');
    // The button where the user chooses the local image to display
    var file = document.querySelector('input[type=file]').files[0];
    // FileReader instance
    var reader  = new FileReader();

    // When the image is loaded we will set it as source of
    // our img tag
    reader.onloadend = function () {
      preview.src = reader.result;
    }

    if (file) {
      // Load image as a base64 encoded URI
      reader.readAsDataURL(file);
    } else {
      preview.src = "";
    }
  }
```

```html
  <input type="file" onchange="previewFile()"><br>
  <img src="" height="200" alt="Image preview...">
```
I was looking for one answer and every where I found impossible, but i got the answer here:

<https://superuser.com/questions/224500/how-to-display-local-images-in-chrome-using-file-protocol>

works very good on chrome .