Scale Unity WebGL Canvas to fit browser window

Hi dear community.

I recently updated to Unity 5.6. For WebGL a lot of things have changed since 5.4.

I wanted to know how to automatically adjust the game canvas to fill the whole browser window. I don’t want to use fullscreen mode. It worked in earlier builds using some tutorials.

I tried the following in my style.css file:

.webgl-content * {border: 0; margin: 0; padding: 0; min-width: 1024px; min-height: 768px; width: 100%; height: 100%;}
.webgl-content {position: absolute; min-width: 1024px; min-height: 768px; width: 100%; height: 100%;}

.webgl-content .logo, .progress {position: absolute; left: 50%; top: 50%; -webkit-transform: translate(-50%, -50%); transform: translate(-50%, -50%);}
.webgl-content .logo {background: url('progressLogo.Light.png') no-repeat center / contain; width: 154px; height: 130px;}
.webgl-content .progress {height: 18px; width: 141px; margin-top: 90px;}
.webgl-content .progress .empty {background: url('progressEmpty.Light.png') no-repeat right / cover; float: right; width: 100%; height: 100%; display: inline-block;}
.webgl-content .progress .full {background: url('progressFull.Light.png') no-repeat left / cover; float: left; width: 0%; height: 100%; display: inline-block;}

.webgl-content .logo.Dark {background-image: url('progressLogo.Dark.png');}
.webgl-content .progress.Dark .empty {background-image: url('progressEmpty.Dark.png');}
.webgl-content .progress.Dark .full {background-image: url('progressFull.Dark.png');}

.webgl-content .footer {margin-top: 5px; height: 38px; line-height: 38px; font-family: Helvetica, Verdana, Arial, sans-serif; font-size: 18px;} 
.webgl-content .footer .webgl-logo, .title, .fullscreen {height: 100%; display: inline-block; background: transparent center no-repeat;} 
.webgl-content .footer .webgl-logo {background-image: url('webgl-logo.png'); width: 204px; float: left;}
.webgl-content .footer .title {margin-right: 10px; float: right;}
.webgl-content .footer .fullscreen {background-image: url('fullscreen.png'); width: 38px; float: right;}

But it doesn’t work. Have I missed something? Must I do something in my index.html?
I’m using the default layout and deleted the “footer” div.

Thanks in advance!



This guy published a template for this: GitHub - greggman/better-unity-webgl-template: A better default template for Unity WebGL
Works perfectly for me.

I made an asset for this!


Also feel free to check out the site that I run ( to see this in action.

I’m using the Kongregate WeblGL template and I faced the same. What I did was add this to my style:

gameContainer {
width: 100%;
height: 100%;
position: absolute;

Basically, I replaced the style div webgl-content for div gameContainer and works fine.

PS.: have a look at the Kongs Template, then you can play around and custom it: GitHub - kongregate/webgl-preloader

This method worked for me(thanks tipue on codepen):

Does this still work for the newest version of Unity?

Hi @perevezentsev

Thank you for your project.

I’m testing on mobile devices but how about canvas size? Just set default size of WebGL size (960x600)?