The reason this exists
Every week I found myself opening five different browser tabs to do five simple things: calculate a subnet, decode a Base64 string, check a WHOIS record, format some JSON, generate a password. Some of those sites were covered in ads. Some required an account. Some I wasn't sure I could trust with sensitive inputs like tokens or passwords.
ToolsKit started as a personal project to fix that. I wanted one place with the tools I actually use, running entirely in the browser, with no server-side data processing, no sign-up wall, and no unnecessary data collection or third-party surveillance scripts.
What ToolsKit is
ToolsKit is a collection of 15 browser-based utilities for developers, sysadmins, and network engineers. The current set covers networking (Subnet Calculator, IP Lookup, DNS Lookup, WHOIS Lookup), security and encoding (Password Generator, Hash Generator, Base64 Encoder, URL Encoder, JWT Decoder), and general developer utilities (JSON Formatter, Regex Tester, Timestamp Converter, Binary Converter, UUID Generator, Cron Parser).
Every tool runs client-side. When you paste a password into the password generator or a JWT into the decoder, nothing is sent anywhere. The processing happens in your browser using standard JavaScript APIs. This is a deliberate design choice, not a marketing line — tools that handle sensitive data should not touch a server.
Who built it
I'm Rebin Mustafa, an IT professional with a background in IT administration, networking, and Microsoft 365. I've spent years working with networks, servers, and the kind of infrastructure plumbing that requires exactly the type of quick-reference tools ToolsKit provides. This site reflects the tools I reach for most often.
The site is under active development. New tools get added when I find myself wishing they existed. If there's something you'd find useful, the contact page is always open.
Privacy
ToolsKit does not collect personal data, does not use tracking pixels, and does not require an account. The only data that touches a server is what's necessary to make network-dependent tools work — for example, the IP Lookup tool queries a geolocation API to return your public IP and location data. Nothing is stored. See the full Privacy Policy for details.