Browser Sandboxing with Browserling

What is an online browser sandbox?

An online browser sandbox, also known as an online URL sandbox, lets you securely and safely open a website that you don't trust in a browser that runs in an isolated environment outside of your network. If the website contains an exploit or malware, your computer and other computers on the local network are not at risk as the browser runs in Browserling's infrastructure. The browser that you get via Browserling runs in a virtual machine on Browserling's servers and it's live and interactive. You can download files, click links, run programs, and all these actions happen inside a virtual machine. Once you close the browser sandbox, the virtual machine gets destroyed together with all files and running processes.

How does Browserling's browser sandbox work?

At Browserling, we developed a cloud-based technology that streams browsers that run on our servers to your browser. The technology is similar to VNC or Remote Desktop but it doesn't require additional installs and runs via JavaScript in your browser. When you request a new browser, we start a fresh virtual machine that has the requested browser installed, and establish a secure websocket connection from your browser to the virtual machine. The virtual machine then streams the desktop changes back to your browser. As the virtual machine runs outside of your network, it's completely sandboxed.

What are URL sandbox use-cases?

The most common URL sandbox use-cases are:

  • Opening links that you don't trust. Let's say you receive an email with a link but you aren't sure if it's safe. It could contain a virus or malware that could infect your computer. If you open it in a sandboxed browser, then you can see what's behind the link without risking infecting your computer.
  • Testing phishing links. Often, hackers send fake emails that look like password reset emails or verification emails. Such links often involve multiple redirects and you can't really know where they will take you. To test such links, you can open them in an URL sandbox and see the website that will load after all the redirects.
  • Opening malicious links. If you already know that a link is malicious, then you can safely open it in a sandboxed browser and see what happens with the system. It's possible such links contain exploits that take over the entire system but you are completely safe as it happens in Browserling's virtual machine.
  • Decoding short links. It's dangerous to click unknown or links as they are shortened and you don't know where they point to. You can use Browserling as a redirect detective and instantly see what the link resolves to. As soon as the short URL finishes redirecting, you can interactively browse the final page.
  • Running executables. When you come across an executable file (like .exe for Windows) from an unknown or untrusted source, it could be risky to run it on your own computer. These files may contain harmful software, such as viruses or spyware, which can damage your system or compromise your personal data. Using a sandboxed browser, you can safely execute these files in a controlled, isolated environment. This allows you to observe the behavior of the executable without any risk to your own system.
  • Viewing PDF and Word documents. It's also dangerous to open unknown PDF and Word documents as they might contain macros that run on-open or zero-day exploits. We installed a PDF viewer and OpenOffice and you can test the documents without fear. If the documents contain something bad, your computer won't be affected as everything happens inside a Browserling virtual machine. Besides PDF and Word documents, you can also open Excel spreadsheets, PowerPoint presentations, DJVU documents, and ePub and Mobi book formats.

Try the URL Sandbox!

To quickly try the URL sandbox, enter an address of any website below, and we'll open it in Chrome that runs on our servers in our infrastructure:

The demo version lets you use Chrome 116 on a Windows 10 system but to access other browsers and systems you'll need to get a paid plan.

Who's using Browserling's browser sandbox?

Browserling's browser sandbox has now become the tool of choice for security professionals and it's used by hundreds of thousands of users around the world. Our customers include governments, states, cities, banks, stock exchanges, universities, newspapers, Fortune 100, Fortune 500 companies, and private multi-billion dollar companies.


What browsers and operating systems can you sandbox?

At the moment, you can run a sandboxed Chrome, Opera, Firefox, Internet Explorer, Edge, Safari, and Tor browser. We have installed all Chrome versions, all Opera versions, all Firefox versions, Internet Explorer 6, 7, 8, 9, 10, and 11, a dozen of latest Edge versions, and multiple latest Tor browser versions. You can also access the following Windows versions – Windows XP, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11, and almost all Android versions – Android 4.4 KitKat, Android 5.0 Lollipop, Android 6.0 Marshmallow, Android 7.0 Nougat.

Do you offer mobile sandboxing?

At the moment, you can access sandboxed Android browsers. We also plan to add sandboxed iOS/iPhone browsers soon.

Do you have an URL sandbox API?

Yes, please see Live API. It lets you embed a sandboxed browser in any website. Coming soon, we're also launching a Headless API that will let you automate browser interactions and get back reports.

Can you help us with a browser sandboxing problem?

We'd love to help! Please send us an email at and briefly describe the problem you're having. We have been solving browser problems for over 10 years and we have seen it all.

Any other questions?

Please contact us at or use our contact form.