Discovery
What's My IP?
Find your public IP address and country instantly, pulled straight from the request headers.
RDAP Lookup
Check domain registration data using the modern RDAP protocol, with clean structured output.
WHOIS Lookup
Query traditional WHOIS registration info for any domain, with registrar and date fields parsed out.
Domain Availability
Check if a domain name is available for registration and see where it would be cheapest to buy.
SSL Checker
Check SSL certificate details, expiration, chain validity, and every domain the certificate covers.
DMARC Lookup
Check the DMARC email authentication policy for any domain and spot common configuration issues.
Utilities
Uptime Calculator
Calculate the allowed downtime for any SLA percentage across a day, week, month, or year.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and the other way around, across time zones.
Cron Expression Parser
Paste a cron expression and see what it means in plain English, with the next few run times.
Cron Expression Generator
Build a cron expression visually without memorising the syntax, with a live preview.
HTTP Status Codes
A quick reference for HTTP status codes with their standard meanings and common use cases.
Bandwidth Calculator
Convert bandwidth units and calculate how long a file transfer will take at a given speed.
Speed Test
Test your internet download and upload speed directly in the browser, no app required.
Why use these tools?
These free tools are designed to help developers, DevOps teams, and system administrators with common tasks. Whether you're troubleshooting network issues, planning your infrastructure SLAs, or just need quick information, they give instant answers with no signup required. Bookmark this page for quick access.