Free security utilities
Free tools for signup abuse and email fraud
Calculators and checkers to audit your signup flow before fake accounts hit your database.
Signup Abuse Calculator
Estimate how much fake accounts and disposable signups cost your SaaS each year.
Run calculator →Disposable Email Checker
Free lookup against 50,000+ burner and temporary email domains in real time.
Check email →Domain Health Checker
Audit MX records, SPF, and domain reputation signals before you accept signups.
Audit domain →Automate detection with the API
Integrate BurnerBlock in minutes and block disposable emails at signup automatically.
Get API keys free