Custom Code Setup

OneSignal Web Push Setup Guide for websites. Works with all Web Push Supported Browsers (Chrome, Firefox, Safari, and more!)


For Advanced Users Only

You should only use custom code if you absolutely need it. Otherwise, we recommend using the Web Push Typical Setup or if using WordPress, see our WordPress Setup.

Step 1 Choose Integration

Select Custom Code if you are adding our Javascript code to your site.

If you are using our WordPress plugin, see our WordPress Setup Guide.


Image shows Web Config options

Step 2 Site Setup

Once you've selected Custom Code as your integration, you must fill out information about your site.


Images shows site setup

Site Name

This will be the default Title of your push notifications if one is not provided.

Enter Site URL

This must be the exact URL you see in the browser when you visit the site.
Most users just enter their base site URL for this field (e.g.

If your site is accessible from both www & non-www links (e.g. AND, please only enter the URL that you wish to send push notifications from. We recommend redirect traffic from one to the other (e.g. users that visit are redirected to, so that all your traffic only goes to one.

Auto Resubscribe

This feature is only for HTTPS sites and you do not select "My site is not fully HTTPS".
This allows users to automatically resubscribe upon returning to the site without being prompted if they clear their browser cache or if you are transferring to OneSignal from another push provider.

Default Notification Icon URL

Enter a link to an icon file that is at least 80x80 pixels (Recommended size is 192x192). The file must be .png, .jpg, or .gif.

My Site is Not Fully HTTPS

Web Push works best with sites that fully support HTTPS, and we recommend using HTTPS for Web Push when possible. To determine if your site fully supports HTTPS, look for the following:

  • Your site URL must begin with https://, and display a green lock icon on the browser's address bar
  • Your site must redirect all http:// requests to https:// requests. In other words, users accessing the site via HTTP will be redirected to the HTTPS version.

If your site does not fully support HTTPS, you should select 'My site is not fully HTTPS':

Once you've selected this, you will need to choose a unique label to be displayed in your notifications. For example, the below image shows notifications are coming from

Warning: You can only change your label if you have less than 100 web users. Once you have 100+ web users, this setting is disabled.


How does OneSignal work differently with HTTP sites?

What if my site is in a subfolder?

Why does my site require a label?

Why can't I change my label?

Step 3 Upload OneSignal SDK

Next, you'll need to add the OneSignal SDK files to your site. To do so,

  1. Download the OneSignal SDK files. (You can also download the files here).

  2. Unzip the OneSignal SDK files. There should be two files:

  1. Upload the OneSignal SDK files to the top-level root of your site directory, making them publicly accessible.


How do I upload files?

There are three ways you can upload files to your site:

Option A: FTP
  • Use an FTP Server like FileZilla to upload the files to your root directory
  • Here is a great step-by-step guide.
Option B: Control Panel
  • Use your hosting provider's control panel like cPanel to upload files.
Option C: Contact your hosting provider
  • Most hosting providers will be more than happy to assist you in uploading files to your site.
  • Just send them the zip file above and ask them to unzip it in your site's root directory.

How can I tell if I've uploaded the files correctly?

Once you've uploaded the OneSignal SDK files, the following URLs should be publicly accessible (replace with your site's domain):


Can these files be served from a subfolder of my site?

Step 4 Add Code to Site

To enable OneSignal on your site, you will need to write code to initialize OneSignal and add web push prompts. You may also have other code you wish to add.

All code must be placed inside your website's <head>. If you do not have access to modify your site's code, you will need to contact a developer to help you. ]

Next: Custom Code Examples


How do I test my site on a local environment?

Can OneSignal integrate with another service worker on my site or a Progressive Web App?