A customer, colleague or your own browser says your website is dangerous. You need it fixed today.
This guide helps you identify exactly which system flagged your site and gives you the fastest route to removal for each one.
Key takeaways
- Identify the warning source first: browser, antivirus, firewall or email filter.
- Each source has its own removal process and timeline.
- Check for a compromise before assuming a false positive.
- In 2026, machine-learning vendors cause a growing share of false positives on new and small sites.
Step 1: Identify the warning
Match what you or your visitors see to its source:
- Full red page in Chrome, Firefox or Safari ("Deceptive site ahead", "contains malware"): Google Safe Browsing. See our deceptive site guide.
- Pop-up or block page from an antivirus product: the antivirus vendor itself, such as Bitdefender, Kaspersky, ESET or Norton.
- Block page on an office or school network: a web filter such as Fortinet, Cisco Talos or Palo Alto Networks.
- Warning label in search results: also Google Safe Browsing. See dangerous in Google Search.
- "Not Secure" in the address bar: an SSL problem, not a blacklist. See our WordPress and Squarespace, Wix and GoDaddy guides.
Step 2: Get the full picture
Check your domain on VirusTotal to see every vendor that currently flags you. One visible warning often means several invisible ones in firewalls and email filters. List each vendor, its label and where you saw it.
Step 3: Rule out a compromise
Look for signs of a hack: unknown admin users, recently modified files, hidden folders, unexpected redirects and injected scripts. If you find any, clean up completely before requesting removal. Our guide on whether your site is hacked walks through the checks.
Step 4: Request removal from each source
File with every vendor in parallel, in order of impact: Google Safe Browsing first, then antivirus vendors, then web filters and threat feeds. Use official channels and include complete evidence. Our false positive reporting guide has a template, and the removal timelines article sets expectations.
What is different in 2026
More vendors now rely on machine-learning classifiers that score domains automatically, including on VirusTotal. That catches threats faster, but it also flags more new, small and fast-changing websites. Clear trust signals, such as company details, a privacy policy, valid SSL and few redirects, matter more than ever. Continuous domain monitoring is the only way to catch these automated listings early.
Step 5: Prevent the next flag
Keep software updated, use two-factor authentication, limit third-party scripts and monitor your domain. Our prevention guide lists eight practical steps.
Frequently asked questions
Is my website really dangerous?
Not necessarily. Many dangerous-site warnings are false positives. Check for a compromise first, then dispute if the site is clean.
Which warning should I fix first?
The browser warning from Google Safe Browsing, because it blocks the most visitors.
How long will it take to remove all warnings?
Google usually clears in one to three days. Clearing every vendor typically takes one to two weeks when requests run in parallel.
Can I fix this without technical knowledge?
Diagnosis and removal requests require no technical skills. If there was a compromise, the cleanup may need a developer or your host.