---
title: File.fileSize
slug: Web/API/File/fileSize
tags:
  - DOM
  - Files
  - Property
translation_of: Web/API/File/fileSize
---
<p>{{APIRef("File API") }}{{non-standard_header}}</p>

<p>{{deprecated_header(7.0)}}</p>

<h2 id="Summary">Summary</h2>

<p>Returns the size of a file in bytes.</p>

<div class="note">This property is deprecated. Use {{domxref("Blob.size")}} instead.</div>

<h2 id="Syntaxe">Syntaxe</h2>

<pre>var size = <em>instanceOfFile</em>.fileSize</pre>

<h2 id="Value">Value</h2>

<p>A number</p>

<h2 id="Specification">Specification</h2>

<p>Not part of any specification.</p>

<h2 id="See_also">See also</h2>

<ul>
 <li>{{domxref("Blob.size")}}</li>
</ul>