Online IT & Web Utilities

Your free IT toolkit
in the browser

No installs. No sign-up. Fast, focused tools built for IT professionals and everyday users.

19 Live Tools
100% Browser Based
Free Always
🔍

All Tools

🎂
general
Age Calculator ↗
Calculate exact age from DOB, date differences, or compare ages across your whole family with a gap matrix.
Live
🔄
networking
CIDR to Wildcard ↗
Convert between CIDR notation and Cisco ACL wildcard masks. Auto-generates ACL syntax.
Live
📋
networking
IP Address Inventory Planner ↗
Allocate IP addresses by category within a CIDR range, auto-generate hostnames, export to Excel with PowerShell DHCP commands.
Live
📱
web
QR Code Generator ↗
Generate QR codes for URLs, text, Wi-Fi, email and vCard, download as PNG instantly.
Live
📡
security
RFID Converter ↗
Convert RFID card numbers between Decimal, HEX and Swapped Endian formats. Bulk CSV/Excel upload.
Live

What is ITToolKit?

ITToolKit is a free collection of browser-based utilities built specifically for IT professionals, network engineers, system administrators and everyday users who need reliable tools without the overhead of installing software or creating accounts. Every tool on this site runs entirely in your browser using JavaScript, which means nothing you type or paste is ever sent to a server.

The toolkit covers a wide range of everyday IT tasks. On the networking side there are tools like the Subnet Calculator, VLSM Subnet Planner and CIDR to Wildcard Converter that are designed for real Cisco and Windows network environments. On the security side the Windows Event ID Lookup database covers over 200 Event IDs with plain-English explanations and the Base64 Encoder includes a dedicated PowerShell encoded command decoder for malware analysis. For general utility work there are tools for unit conversion, word counting, text case conversion, QR code generation, timestamp conversion and more.

ITToolKit is built and maintained by OnlineComputerTechnician.com, an on-site IT support business that has been serving homes and businesses across South East Melbourne since 2013. The tools here are built from real day-to-day experience working in Microsoft Active Directory environments, Cisco networking and hardware support.

Tool Categories

🌐
Networking
3 tools
🔐
Security
4 tools
⚙️
Encoding
3 tools
📄
Data
3 tools
⚖️
General
4 tools
🎨
Web / Design
2 tools

Why Use Browser-Based Tools?

  • 🔒
    Privacy by default. Sensitive data like IP addresses, card numbers, passwords and PowerShell scripts never leave your machine. There is no server receiving your input.
  • ⚡
    No install, no account. Open the page and it works. No download, no registration, no waiting for a trial to expire.
  • 📶
    Works offline once loaded. The site installs as a PWA and caches all tools. Useful on site visits where internet is unreliable.
  • 🆓
    Completely free. No premium tier, no paywall, no limit on how many times you use a tool.

Popular Tools for IT Professionals

  • 🌐
    Subnet Calculator quickly breaks down any IPv4 address and CIDR prefix into network address, broadcast, usable host range and wildcard mask. Essential for network planning.
  • 📋
    Windows Event ID Lookup covers 200+ Event IDs across Security, System and Application logs with plain-English explanations and troubleshooting steps. Great alongside Event Viewer and SIEM dashboards.
  • ⚙️
    Base64 Decoder with PowerShell support decodes -EncodedCommand arguments using UTF-16LE, the same encoding PowerShell uses. Useful during malware investigation alongside Event ID 4104.
  • 🗂️
    VLSM Subnet Planner takes your list of VLANs and required host counts and automatically assigns the most efficient subnets, with Cisco IOS interface config output ready to paste.

Frequently Asked Questions

Is ITToolKit really free?
Yes, completely. Every tool is free to use with no account required, no usage limits and no premium features locked behind a paywall. The site is supported by Google AdSense ads.
Is my data safe when I use these tools?
All tools run entirely in your browser. Nothing you type, paste or upload is sent to any server. This applies to IP addresses, passwords, PowerShell scripts, RFID card numbers and any other sensitive data.
Can I use ITToolKit offline?
Yes. The site is a Progressive Web App (PWA). Once you have visited it, all tools are cached and work without an internet connection. You can also install it to your home screen on mobile.
Who builds and maintains these tools?
ITToolKit is built by the team at OnlineComputerTechnician.com, an IT support business based in South East Melbourne operating since 2013. The tools reflect real day-to-day needs from working in Cisco, Windows AD and hardware support environments.