In my humble opinion, this may not be safe. Here are 5 reasons why free VPNs can be a threat to you:

1. Free VPNs can use built-in snooping. Free services often embed trackers into their service to match personalized ads or collect their analytics, which puts your confidential data at risk.
2. Free VPN often fails to unblock content. This happens because many users are simultaneously connected to the online service through one server. The online service you want to connect to quickly detects that you are using a VPN and blocks the IP address of the VPN server.
3. The VPN provider may be infected with malware. Free VPNs are often full of ads that can be infected with a virus.
4. VPNs with no charge can hack your browser. Some VPNs may redirect you to other sites without your permission by hijacking your browser.
5. Free VPNs can allow governments to collect user data. The only source of income for free VPN services is the collection of data and selling it to third parties, like advertising agencies or government bodies, etc. Therefore, any third party can access your data.

There are many reasons why your online activity may be in danger, so you should carefully approach the use of various free services. Among paid VPN services, I can single out VPN Unlimited, because I have been actively using it for a long time and during this time there have been no data leaks. This security solution implements high standards of encryption, the No-Log Policy, and many other features that guarantee safe and private web browsing.