Network, DNS & Security Tools
Your IT Toolkit with an Owl's Help
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What's in the toolkit
Percival's Toolkit is a set of free, no-signup network, DNS, security, and developer utilities that run right in your browser wherever possible. Nothing to install, no account to create, and no plan to pick. Open a tool and use it.
Speed Test
Raw connection performance: how fast data actually moves (Speed Test) and how quickly a request gets a first response (Latency Checker). Worth running before assuming a slow-feeling site or call is the other end's fault.
Lookups
The general-purpose research tools: DNS Lookup, Is It Down, IP Geolocation, Domain & IP Lookup, Master Lookup, and CAA Checker. A good starting point for figuring out what's actually going on with an unfamiliar domain or IP before digging into anything more specific.
Network
Subnetting and scheduling math that's easy to get wrong by hand: Subnet Calculator, CIDR / Mask Converter, Duration Converter, Cron Explainer, IPv6 Tools, and the Preshared Key Generator for VPN tunnel configs.
Deliverability and authentication tools: Blacklist Check, SPF / DMARC Checker, DKIM Checker, Email Header Analyzer, and Reverse DNS / PTR Lookup. Useful for troubleshooting mail that's bouncing, landing in spam, or failing to authenticate.
Security
Password Breach Check, Hash Identifier, Subdomain Finder, and MAC Address Analyzer, for everyday security checks that don't need a full toolkit install.
Dev Tools
The utilities most developers reach for daily: JSON Formatter, Base64 / URL Encoder, Timestamp Converter, JWT Decoder, Regex Tester, URL Parser, HTTP Status Codes, Password Generator, Hash Generator, and User-Agent Parser.
Owl Fact
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