W
WHOIS Lookup
Domain registration lookup
CheckersFreeNo Login
★★★★★
—Checkers
Checkers tools and platforms.
19 services
Services
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D
Down For Everyone Or Just Me
Website status checker
CheckersFreeNo Login
★★★★★
—P
Porkbun
Affordable domain registrar
CheckersPaidLogin Required
★★★★★
—G
GoDaddy
Domains and small business tools
CheckersPaidLogin Required
★★★★★
—C
Cloudflare Registrar
At-cost domain registration
CheckersPaidLogin Required
★★★★★
—N
Namecheap
Domain registrar and hosting
CheckersPaidLogin Required
★★★★★
—S
StatusCake
Uptime and performance tests
CheckersFreemiumLogin Required
★★★★★
—P
Pingdom
Website performance monitoring
CheckersPaidLogin Required
★★★★★
—U
UptimeRobot
Website uptime monitoring
CheckersFreemiumLogin Required
★★★★★
—C
Cron-job.org
Free cron job scheduler
CheckersFreeLogin Required
★★★★★
—C
Censys
Internet attack surface search
CheckersFreemiumLogin Required
★★★★★
—S
Shodan
Search engine for IoT devices
CheckersFreemiumLogin Required
★★★★★
—U
URLScan.io
Website scanner and sandbox
CheckersFreeOptional Login
★★★★★
—H
Have I Been Pwned
Breach notification service
CheckersFreeOptional Login
★★★★★
—G
GTmetrix
Website speed testing
CheckersFreemiumOptional Login
★★★★★
—P
PageSpeed Insights
Web performance audit tool
CheckersFreeNo Login
★★★★★
—B
BuiltWith
Website technology profiler
CheckersFreemiumOptional Login
★★★★★
—C
Can I Use
Browser support tables
CheckersFreeNo Login
★★★★★
—S
SSL Labs
Test SSL/TLS configuration quality
CheckersFreeNo Login
★★★★★
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