Tools

Practical browser-based tools for system administrators, IT engineers, developers, and power users. These utilities help solve everyday infrastructure, encoding, and troubleshooting tasks quickly.

Everything runs in your browser unless a tool says otherwise: pasted tokens, files and logs are not uploaded.

Encoding tools

Encode, decode and convert

All encoding tools
Base64 encoder ProFiles and text, UTF-8 safe, data URI output. Runs locally.Open tool URL encoder and decoderPercent-encode text and query values, decode encoded strings.Open tool cURL converterTurn a curl command into fetch(), Axios or Invoke-RestMethod.Open tool
Data utilities

Read timestamps, JSON and tokens

All data utilities
Unix timestamp converterEpoch to date and back, UTC or local, seconds or milliseconds.Open tool JSON formatter and validatorFormat, validate and repair: errors listed with line, column and a fix.Open tool JWT decoderRead header, payload and expiry without uploading the token.Open tool
Security tools

Passwords and hashes, in your browser

All security tools
Password generatorStrong random passwords, with length and character sets under your control.Open tool Hash generatorMD5, SHA-1, SHA-256 and SHA-512 hashes of any text, in your browser.Open tool Certificate and CSR decoderSubject, SAN, expiry, key and chain order, decoded in your browser.Open tool
Network tools

Reachability, ports and addressing

All network tools
IP subnet calculatorMask, wildcard, network, broadcast and host range for any IPv4 CIDR block.Open tool My IP and network infoPublic IP, provider and ASN, as this site sees you. Handy for checking a VPN exit.Open tool Website and host checkerDNS, TCP ports, HTTP status and the TLS certificate, checked from our server.Open tool Port checkerOpen, closed or filtered: test a TCP port from outside your network.Open tool
DNS tools

Records, propagation and mail DNS

All DNS tools
DNS lookupA, MX, TXT, NS and more, from the public resolver you pick.Open tool Reverse DNS lookupPTR records for an IPv4 or IPv6 address: the hostnames it maps back to.Open tool DNS propagation checkerSee which public resolvers still return the old record.Open tool WHOIS lookupRegistrar, dates, name servers and status for .com-style domains; the raw record for any.Open tool SPF record validatorSyntax check of a pasted SPF record, with its own DNS-lookup terms counted.Open tool DMARC record validatorPolicy, alignment and reporting addresses, with common mistakes flagged.Open tool
System tools

Windows command builders and analysis

All system tools
ROBOCOPY command builderMirror, exclusions, retries and logging, without guessing switches.Open tool mklink command builderJunctions, symlinks and hard links, with link and target in the right order.Open tool Scheduled task builderschtasks and Register-ScheduledTask, with the traps that make tasks fail flagged.Open tool nltest command builderDC discovery, secure channel and trust checks, switch by switch.Open tool Windows Event Log Analyzer AIPaste an event, get a plain-English explanation and its common causes.Open tool Windows 11 registry tweaksReady-to-run .reg files for the tweaks admins change most.Open tool
PowerShell and PowerCLI

vSphere from the command line

PowerShell and PowerCLI tools
PowerCLI command builderInventory, snapshots, hosts and datastores, as a finished command.Open tool
Tools supported by knowledge

The guides explain what the tools build

The command builders come from real admin work. The guides cover the switches, the output and the ways a command goes wrong.

Browse guidesCheat sheets