Bootstrap Fileinput

An enhanced HTML 5 file input for Bootstrap 5.x/4.x./3.x with file preview, multiple selection, and more features.
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An enhanced HTML 5 file input for Bootstrap 5.x, 4.x, and 3.x with file preview for various files, offers multiple selection, resumable chunk uploads, and more. The plugin allows you a simple way to setup an advanced file picker/upload control built to work specially with Bootstrap 5.x, 4.x, and 3.x CSS3 styles. It enhances the file input functionality further, by offering support to preview a wide variety of files i.e. images, text, html, video, audio, flash, and objects. In addition, it includes AJAX based uploads, dragging & dropping files, viewing upload progress, and selectively previewing, adding, or deleting files.

NEW: Bootstrap 5.x support is added from v5.2.0 (major release after v5.1.5) of the plugin. With v5.2.0, the plugin is able to automatically detect the bootstrap library version and deliver the relevant bootstrap specific functionality (if the bootstrap library JS file is loaded). Alternatively, check the $.fn.fileinputBsVersion setting for advanced use cases to avoid Bootstrap version detection issues.

NOTE: Version 5.x is a significant rewrite. With version 5.x, the plugin code has been revamped with enhanced file management, resumable chunk uploads support, and other new features. You can go through the various closed enhancements and features and documented for Release 5.x milestone.

Krajee Default Theme

NOTE: An alternative new Krajee Explorer Theme (preview shown below) for bootstrap-fileinput has been released and available since v4.3.7. For more theming options and suggestions refer the theming demos.

Krajee Explorer Theme

Documentation and Demo

View the plugin documentation and plugin demos at Krajee JQuery plugins.


  1. Bootstrap 5.x or 4.x, or 3.x
  2. Latest JQuery
  3. Most modern browsers supporting HTML5 (inputs and FileReader API) including CSS3 & JQuery. For Internet Explorer, one must use IE versions 10 and above. IE9 and below will work as a normal file input, and will not support multiple file selection or the HTML 5 FileReader API.
  4. With release 4.0, AJAX uploads are supported. AJAX uploads require that the browser support HTML5 FormData and XHR2 (XMLHttpRequest 2). Most modern browsers support FormData and XHR2. The plugin will automatically degrade to normal form based submission for browsers not supporting AJAX uploads


  • Bootstrap 5.x is supported in addition to Bootstrap 3.x and 4.x since release v5.2.0. Refer the CHANGE LOG for details.
  • Bootstrap 4.x is supported in addition to Bootstrap 3.x since release v4.4.4. Refer the CHANGE LOG for details.
  • You can use the sass branch for installation using bootstrap-sass dependency. The master branch can be used for installation using plain bootstrap dependency.


Using Bower

To install using the bower package manager run:

bower install bootstrap-fileinput

Using NPM

To install using the npm package manager run:

npm install bootstrap-fileinput

Using Composer

To install using the composer package manager run:

$ php composer.phar require kartik-v/bootstrap-fileinput "@dev"

or add:

"kartik-v/bootstrap-fileinput": "@dev"

to your composer.json file

Manual Install

You can also manually install the plugin easily to your project. Just download the source ZIP or TAR ball and extract the plugin assets (css and js folders) into your project.


Step 1: Load the following assets on your page in the order mentioned.

<!-- bootstrap 5.x or 4.x is supported. You can also use the bootstrap css 3.3.x versions -->
<link rel="stylesheet" href="[email protected]/dist/css/bootstrap.min.css" crossorigin="anonymous">

<!-- default icons used in the plugin are from Bootstrap 5.x icon library (which can be enabled by loading CSS below) -->
<link rel="stylesheet" href="[email protected]/font/bootstrap-icons.min.css" crossorigin="anonymous">

<!-- alternatively you can use the font awesome icon library if using with `fas` theme (or Bootstrap 4.x) by uncommenting below. -->
<!-- link rel="stylesheet" href="" crossorigin="anonymous" -->

<!-- the fileinput plugin styling CSS file -->
<link href="[email protected]/css/fileinput.min.css" media="all" rel="stylesheet" type="text/css" />

<!-- if using RTL (Right-To-Left) orientation, load the RTL CSS file after fileinput.css by uncommenting below -->
<!-- link href="[email protected]/css/fileinput-rtl.min.css" media="all" rel="stylesheet" type="text/css" /-->

<!-- the jQuery Library -->
<script src="" crossorigin="anonymous"></script>

<!-- buffer.min.js and filetype.min.js are necessary in the order listed for advanced mime type parsing and more correct
     preview. This is a feature available since v5.5.0 and is needed if you want to ensure file mime type is parsed 
     correctly even if the local file's extension is named incorrectly. This will ensure more correct preview of the
     selected file (note: this will involve a small processing overhead in scanning of file contents locally). If you 
     do not load these scripts then the mime type parsing will largely be derived using the extension in the filename
     and some basic file content parsing signatures. -->
<script src="[email protected]/js/plugins/buffer.min.js" type="text/javascript"></script>
<script src="[email protected]/js/plugins/filetype.min.js" type="text/javascript"></script>

<!-- piexif.min.js is needed for auto orienting image files OR when restoring exif data in resized images and when you
    wish to resize images before upload. This must be loaded before fileinput.min.js -->
<script src="[email protected]/js/plugins/piexif.min.js" type="text/javascript"></script>

<!-- sortable.min.js is only needed if you wish to sort / rearrange files in initial preview. 
    This must be loaded before fileinput.min.js -->
<script src="[email protected]/js/plugins/sortable.min.js" type="text/javascript"></script>

<!-- bootstrap.bundle.min.js below is needed if you wish to zoom and preview file content in a detail modal
    dialog. bootstrap 5.x or 4.x is supported. You can also use the bootstrap js 3.3.x versions. -->
<script src="[email protected]/dist/js/bootstrap.bundle.min.js" crossorigin="anonymous"></script>

<!-- the main fileinput plugin script JS file -->
<script src="[email protected]/js/fileinput.min.js"></script>

<!-- following theme script is needed to use the Font Awesome 5.x theme (`fas`). Uncomment if needed. -->
<!-- script src="[email protected]/themes/fas/theme.min.js"></script -->

<!-- optionally if you need translation for your language then include the locale file as mentioned below (replace LANG.js with your language locale) -->
<script src="[email protected]/js/locales/LANG.js"></script>

With v5.2.1, the plugin is able to automatically detect the bootstrap library version and deliver the relevant bootstrap specific functionality (if you have loaded the bootstrap.min.js before fileinput.min.js). In case of any issues - you can explicitly set the bootstrap version by setting the following variable before the plugin initialization script.

// set this before initializing the fileinput plugin
$.fn.fileinputBsVersion = '3.4.1'; // for example if using bootstrap css 3.4.1 version

If you noticed, you need to load the jquery.min.js and bootstrap.min.css in addition to the fileinput.min.css and fileinput.min.js. The theme file themes/fa/theme.js can be optionally included for the font awesome icons styling. The locale file <lang>.js can be optionally included for translating for your language if needed.

Optional Dependent Plugins

  • The piexif.min.js file is the source for the Piexifjs plugin by hMatoba. It is required to be loaded before fileinput.min.js if you wish to use the image resize feature of the bootstrap-fileinput plugin.
  • The sortable.min.js file is the source for the Sortable plugin by rubaxa. It is required to be loaded before fileinput.min.js if you wish to sort the thumbnails in the initial preview.

For ease of access, the sources for the above plugins are included in the js/plugins folder of this project repository.

Step 2: Initialize the plugin on your page. For example,

// HTML markup
<input id="input-id" name="file-data" type="file">

$(document).ready(function() {
    // initialize with defaults

    // with plugin options
    $("#input-id").fileinput({'uploadUrl': '/path/to/your-upload-api', 'previewFileType': 'any'});

The #input-id is the identifier for the input (e.g. type = file) on your page, which is hidden automatically by the plugin.

Alternatively, you can directly call the plugin options by setting data attributes to your input field. To auto initialize the plugin with just HTML markup - add the CSS class file to your file input markup element.

<input id="input-id" type="file" class="file" data-preview-file-type="text" >

NOTE: When initializing the plugin via javascript (as mentioned earlier), do not add the CSS class file to the input markup (else you would get an erronaeous / inconsistent output).


Code Contributors

This project exists thanks to all the people who contribute. [Contribute].

Financial Contributors

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bootstrap-fileinput is released under the BSD-3-Clause License. See the bundled for details.

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