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ON24 Knowledge Center

Supported Browsers for the Audience - Flash


This article lists the Supported browsers and bandwidth requirements for ON24 Flash-based webcasts.

Note to Safari Users: Apple has added an autoplay blocking feature to the Safari browser. A Play button will now display when launching the webcast. Attendees will click Play to view the webcast. Future visits to the ON24 domain will not be blocked.

Supported Browsers and Operating Systems

The following requirements and specifications are recommended to provide an optimal experience listening to/and or viewing webinars powered by ON24.

**Using the latest version is recommended

Microsoft Edge

IE 11




Windows 7


Windows 8


Windows 10


Mac 10.10x


Android 4.x


Apple iOs


**Running the latest version of the supported browsers is recommended. If an attendee is using an unsupported version, they may experience difficulty in viewing and hearing the webinar.

You can download the latest version of each browser by clicking on the icons below.

Flash Player

Platform Update: As ON24 begins migrating accounts over to HTML5, your webinars may continue to require Flash during the transition. Migrating from live Flash streaming to live MPEG-DASH streaming is a key component our migration to HTML5. We are underway with our beta program and having a lot of success with the initial group of customers. If you would like to participate in the live MPEG-DASH beta program, please contact your CSM for more information.

Flash is a streaming media player that will need to be installed in order to access the webinar. Attendees must have the latest version of Flash installed on their computer.

Click on the icon below to download the latest version of Flash Player for your webinar.

System Configurations

Browser Configuration

Must accept cookies and have JavaScript enabled. Click here to learn how to enable cookies in your browser.

Screen Resolution

1024x768 minimum

Processor (CPU)

1GHz or faster


512 Mb minimum

Bandwidth Requirements

Audio-based webinars

300 Kbps or greater

Video-based webinars (Webcam, Broadcast Video, etc.)

600 Kbps or greater

Audio + Screen Share

900 Kbps or greater

Video + Screen Share

1.5Mbps or greater

Signal Indicator

*Please contact your CSM if you would like to enable this feature in your account.

With the June 2017 Platform Release, we added the option to display a signal indicator within the Media Player for any streaming media. This indicator will inform audience members if they do not have sufficient bandwidth to support the streaming media including presenter video, screen share, and video clips.


The following problems can contribute to having insufficient bandwidth:

  • If you are connecting to the Internet through a slow connection, or over a congested WiFi or cellular (mobile) network.
  • You are trying to access a webinar during peak Internet traffic hours.
  • If you are connecting to the Internet from a mobile device.
  • There is heavy traffic on your company network.

To optimize bandwidth, you may consider the following:

  • Upgrading to a faster hard-wired connection.
  • Minimize the number of applications you are running while accessing the event.
  • Try accessing the event during an off-peak Internet traffic period when network congestion may have lessened.


Other free/un-gated ON24 Webcast Elite and other platform content is available at
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