About ToolDrawer

ToolDrawer is a free collection of online IT tools created for technicians, network engineers, system administrators, students and advanced home users who need quick answers without installing software or creating an account. The site focuses on practical utilities that solve common technical jobs: IPv4 and IPv6 subnetting, VLSM planning, CIDR and wildcard conversion, IP inventory planning, MTU and bandwidth calculations, SPF/DKIM/DMARC record checking, JSON formatting and conversion, Base64 and URL encoding, hash and checksum generation, JWT decoding, password generation and strength checking, WCAG contrast checking, QR code creation, timestamp conversion, text diff and cleanup — 34 tools and growing.

The toolkit is built to be simple, fast and private. Most tools run directly in your browser using JavaScript. That means the information you enter is processed on your own device instead of being sent to a remote server. This is especially important for IT tasks where inputs may include internal IP ranges, configuration snippets, encoded strings, inventory lists or troubleshooting notes.

ToolDrawer is maintained by OnlineComputerTechnician.com, an IT support business serving homes and businesses in South East Melbourne since 2013. The tools are based on real support, networking and administration workflows rather than generic calculator templates.

IT work often requires quick checks during larger tasks. A technician may need to confirm whether an IP address belongs to the correct subnet, convert a subnet mask to a wildcard mask for a Cisco ACL, plan VLAN address ranges, decode a suspicious Base64 string, or prepare a clean inventory list for DHCP reservations. These jobs are small, but they interrupt the workflow when the right tool is hard to find.

ToolDrawer brings these utilities into one clean location. Each page is designed around a specific task, with direct inputs, clear outputs, copy buttons where useful and educational notes explaining the result. The goal is not only to calculate an answer, but also to help users understand what that answer means and how it applies in real environments.

The site is also useful for learning. Networking students can use the subnet and VLSM pages to check practice questions. Help desk staff can use the timestamp, text, password and conversion tools during daily work. Small business IT administrators can use the IP inventory planner to prepare structured address plans before deploying printers, servers, access points, cameras or workstations.

The toolkit is intended for people who work with technology regularly. Network engineers can use it for IPv4 subnetting, wildcard masks, VLAN planning and address allocation. System administrators can use it for inventory preparation, timestamp checks, password creation and data conversion. Help desk technicians can use it for quick troubleshooting, text cleanup and customer support preparation. Students can use it to understand subnetting, CIDR ranges and binary mask relationships.

Small businesses may also find the tools useful when planning networks or documenting devices. For example, an office moving to a new network range can use the IP inventory planner to split addresses into categories such as servers, printers, access points, workstations and cameras, then export the plan for documentation.

Networking tools include the IPv4 Subnet Calculator, IPv6 Subnet Calculator, VLSM Subnet Planner, CIDR to Wildcard Mask Converter, IP Address Inventory Planner, MTU & TCP MSS Calculator, Bandwidth Transfer Time Calculator and the Common Network Ports Reference. These tools help with address planning, Cisco ACL preparation, tunnel troubleshooting and network documentation.

Email and DNS tools include the SPF, DKIM & DMARC Record Checker, which validates the syntax of email authentication records and explains every mechanism in plain English — a staple for fixing deliverability problems and rolling out phishing protection.

Data and text tools include the JSON Formatter & Validator, JSON to CSV conversion, XML and YAML formatting, Base64 encoding and decoding, URL encoding and parsing, text case conversion, text diff and line cleanup, word counting, lorem ipsum generation and timestamp conversion. These are useful when cleaning logs, preparing reports or moving data between systems.

Security tools include the Password Generator, Password Strength Checker, Hash & Checksum Generator (SHA-1 through SHA-512 with download verification) and the JWT Decoder for inspecting token claims. The Base64 tool also includes a dedicated PowerShell encoded-command decoder for malware analysis.

Web and design tools include the WCAG Color Contrast Checker, HexLab color converter, Image to Base64 converter, QR code generator, Windows Event ID lookup, unit conversion, random value generation and specialist converters. These tools are built for quick access when working with users, devices or support tickets.

ToolDrawer will continue to grow with more practical IT utilities, clearer documentation, improved examples and more export options. Planned improvements include deeper networking references, additional Windows administration helpers, better printable reports, more accessibility refinements and expanded guidance for common technician scenarios.

Suggestions are welcome. If a tool would save time for real IT work, it is a good candidate for ToolDrawer.

Visit the ToolDrawer homepage to browse all available tools, or use the navigation menu to open a specific calculator or converter.