What is WebRTC in simple terms?

WebRTC is a browser technology that lets websites send live audio, video, or data while a page is open. It is commonly used for video meetings, browser calls, screen sharing, and real-time communication features.

Is WebRTC the same as VoIP?

VoIP means any voice call sent over the internet. WebRTC is one way to build internet-based calling inside a browser, while other VoIP services may use apps, desk phones, or SIP-based systems.

What is the difference between WebRTC and WebSocket?

WebRTC is mainly used for live audio, video, and direct data exchange. WebSocket is used for ongoing messages between a browser and a server, such as chat updates, alerts, or live dashboard changes.

Can WebRTC call a normal phone number?

WebRTC does not connect to the phone network by itself. A calling service needs to bridge the browser connection to mobile and landline networks. HelloAirDial uses this approach for browser-based phone calls.

Do I need to download an app to use WebRTC?

In most cases, you do not need to download an app. WebRTC is built into modern browsers, so a website can use it after you give the required microphone or camera permission.

WebRTC uses browser permission prompts and encrypted media connections. For browser-to-phone calls, the WebRTC part can be encrypted, but the call also depends on the security limits of the traditional phone network once it is bridged.

Does WebRTC work on iPhone and Android?

Yes, WebRTC works in modern mobile browsers, including Safari on iPhone and Chrome on Android. The exact experience can still depend on browser version, microphone permissions, network quality, and the website using it.

WebRTC Technology Explained

When you make a call from a web page, the browser needs permission to use your microphone and a way to send your audio without noticeable delay. WebRTC provides that browser connection, while the calling service connects your audio to the regular phone network.

What Is WebRTC and How Does It Work?

WebRTC stands for Web Real-Time Communication. It is an open standard built into modern browsers such as Chrome, Safari, Firefox, and Edge.

WebRTC lets the browser act as a real-time communication tool. The same basic technology can support video meetings, browser-based support calls, and web phone calls.

A WebRTC call usually works in four steps:

Your browser asks for permission. Before any call starts, the browser asks to use your microphone or camera. This prevents websites from listening without your approval.
The call service exchanges connection details. The two sides need to share basic information before they can connect. This step is called signaling.
WebRTC finds a working route. It tries to send media directly when possible. If a network or firewall blocks that path, relay servers can help the call connect.
Your audio or video is sent in real time. The media is encoded and encrypted before it is delivered, which keeps delay low enough for a normal conversation.

WebRTC browser call flow from a web browser through a calling service to a regular phone number

WebRTC vs VoIP vs Regular Phone Calls

WebRTC, VoIP, and regular phone calls all let people speak to each other, but they do it in different ways. WebRTC starts in the browser, VoIP usually runs through an internet calling app or business phone system, and regular phone calls travel through the public phone network.

Feature	WebRTC browser calling	VoIP or SIP calling	Regular phone calls
Works in a browser	Yes	Sometimes	No
App required	No	Often	No
Internet required	Yes	Yes	No for landlines, yes for Wi-Fi calling
Calls mobile or landline numbers	Yes, when connected through a calling service	Yes, when supported by the provider	Yes
Call quality	Depends on internet connection and device microphone	Depends on provider, app, and network	Usually stable, but often lower audio range
Security	Encrypted in the browser connection	Depends on provider and setup	Usually not encrypted end to end
Emergency calls	Limited or not supported by many browser calling services	Limited unless configured for emergency calling	Best supported

When WebRTC Is Useful

WebRTC is useful when a website needs live communication without asking the user to install software. Common examples include browser phone calls, video meetings, customer support conversations, screen sharing, and live audio or video features inside web apps.

WebRTC vs WebSocket

WebRTC and WebSocket are often mentioned together, but they solve different problems.

WebRTC is built for real-time audio and video. It can also move data directly between participants. It is the better fit when a website needs a live call, video meeting, screen share, or other media-heavy session.

WebSocket is built for ongoing messaging between a browser and a server. It works well for chat updates, notifications, dashboards, and other live data that does not need audio or video.

In some products, the two technologies work together. WebSocket can help exchange setup messages, while WebRTC carries the actual call media.

Is WebRTC Secure?

A website cannot use your microphone or camera until the browser asks for permission and you allow it. WebRTC also encrypts the media connection, so the audio or video is not sent as plain, readable data while it travels through that connection.

Security works differently when a browser call is connected to a mobile or landline number. The WebRTC part of the call can be encrypted, but once the call is bridged into the traditional phone network, it follows the security limits of that network. For that reason, browser-to-phone calls should not be described as fully end-to-end encrypted unless the entire path is encrypted from the browser to the recipient.

For safer browser calling, use an updated browser, check that the site uses HTTPS, and only allow microphone access on services you trust.

HelloAirDial browser dialer for entering a phone number and starting a call

How HelloAirDial Uses WebRTC

HelloAirDial uses WebRTC for the browser part of a call:

You start the call in your browser. The page asks for microphone access before the call begins.
WebRTC sends your audio from the browser. The call runs through a WebRTC connection while the page stays open.
HelloAirDial connects the call to the phone network. The person you call can answer on a mobile phone or landline.
The recipient does not need extra software. They do not need to use WebRTC, install an app, or create a HelloAirDial account.
You can call from common devices. A laptop, tablet, or phone browser can work as long as it has internet access, microphone permission, and a supported browser.