Enter a URL
First of all, quickly check if Google has detected problems on your site.
You can use Google's free site verification service. This service uses Google’s secure browsing technology to check if your site is potentially harmful to your visitors.You can also inspect your site from the "Site status" menu in the Google Console. If Google has previously reported that your site is hosting malware, the alert signal will disappear once you have cleared your site of the malware. Effective (and free) to identify the presence of malware on your site, this tool is a good starting point.