Zoom to fit: PDF Embedded in HTML

I am embedding a local pdf file into a simple webpage and I am looking to set the initial zoom to fit to the object size. Here is what I tried but it is not affecting the zoom.

 <embed src="filename.pdf?zoom=50" width="575" height="500">

does anyone know how to modify the code so its initial zoom is set to fit the object size.

Bit of a late response but I noticed that this information can be hard to find and haven't found the answer on SO, so here it is.

Try a differnt parameter #view=FitH to force it to fit in the horzontal space and also you need to start the querystring off with a # rather than an & making it:

filename.pdf#view=FitH

What I've noticed it is that this will work if adobe reader is embedded in the browser but chrome will use it's own version of the reader and won't respond in the same way. In my own case, the chrome browser zoomed to fit width by default, so no problem , but Internet Explorer needed the above parameters to ensure the link always opened the pdf page with the correct view setting.

For a full list of available parameters see this doc

EDIT: (lazy mode on)

For me this worked(I wanted to zoom in since the container of my pdf was small):

    <embed src="filename.pdf#page=1&zoom=300" width="575" height="500">

This method uses "object", it also has "embed". Either method works:

<div id="pdf">
    <object id="pdf_content" width="100%" height="1500px" type="application/pdf" trusted="yes" application="yes" title="Assembly" data="Assembly.pdf?#zoom=100&scrollbar=1&toolbar=1&navpanes=1">
    <!-- <embed src="Assembly.pdf" width="100%" height="100%" type="application/x-pdf" trusted="yes" application="yes" title="Assembly">
    </embed> -->
    <p>System Error - This PDF cannot be displayed, please contact IT.</p>
    </object>
</div>

just in case someone need it, in firefox for me it work like this

<iframe src="filename.pdf#zoom=FitH" style="position:absolute;right:0; top:0; bottom:0; width:100%;"></iframe>

Bit late response to this question, however I do have something to add that might be useful for others.

If you make use of an iFrame and set the pdf file path to the src, it will load zoomed out to 100%, which the equivalence of FitH

Followed @Rich answer, I used view=FitH in my code to view PDF content base64 in Angular as below.

I shared for whom concern about view base64 content PDF file with object tag using Angular framework.

The option for view PDF

this.pdfContent =
      URL.createObjectURL(this.b64toBlob(content, 'application/pdf')) +
      '#toolbar=0&navpanes=0&scrollbar=0&view=FitH';

Read PDF content from API as

let content = DataHelper.getDataFromAPI();

When click show content button use

showData() {
    let content = DataHelper.getDataFromAPI();

    this.pdfContent =
      URL.createObjectURL(this.b64toBlob(content, 'application/pdf')) +
      '#toolbar=0&navpanes=0&scrollbar=0&view=FitH';

    this.pdfview.nativeElement.setAttribute('data', this.pdfContent);
  }

In HTML file use object tag as

<object #pdfview
[data]=''
type="application/pdf"
width="100%"
height="800px"
>
</object>

Link Angular demo https://stackblitz.com/edit/angular-ivy-tdmieb

Use iframe tag do display pdf file with zoom fit

<iframe src="filename.pdf" width="" height="" border="0"></iframe>

This works fine for me

<embed src=".file-name.pdf#zoom=FitH" width="100%" height="1930px" />