Every tool below is free to use with no signup, and each tool’s page states where it runs.
Updated
Security Calculators
2 toolsUptime, download-time and password math for security and infrastructure teams.
- Downtime a year At 99.9% 8h 45m 58s Security In your browser Uptime Calculator Downtime an uptime target allows, from a day to a year. 43m 50sPer average month (30.44 days)
- Download time 50 GB at 300 Mbps 24m 41s Security In your browser Download Time Calculator How long a file takes at your connection speed. 270 MbpsEffective speed
Network Tools
3 toolsLookups and converters for addresses, records and connections.
Featured network tool What Is My IP Address See the address websites see for you, with your provider, location and connection, the moment the page opens. IPv4 or IPv6 Provider and ASN Approximate location Time zone Open the tool- Network 192.168.1.10/24 192.168.1.0/24 Network In your browser IP Subnet Calculator Network, broadcast, host range and mask for any IPv4 block. 254Usable hosts
- SPF record Example: example.com v=spf1 -all DMARC: p=reject Network Public DNS lookup TXT Record Lookup TXT, SPF and DMARC records for any domain. SPF and DMARC read outAny public domain
AI Tools
1 toolToken counts for working with large language models, computed in your browser.
Featured AI tool Token Counter Paste a prompt or a document; get exact token counts in the encodings OpenAI models use. o200k and cl100k Counted in your browser Characters per token Open the tool
