How it works

This site is the entry point for my free browser tools. All tools run directly in your browser — no sign-up and no install required. This page explains how the index works and gives you a short guide for each tool.

Using this page

• Open a tool — click a card (or “Open tool”) to open the app in a new tab.
• Features — every card lists the main features of the tool so you can see at a glance what it can do.
• New tools — further tools are added over time. Cards for upcoming tools appear as “More tools soon”.

StakeMap 3D

StakeMap 3D is an interactive 3D map for stakeholder and project planning. Add the people involved as nodes, assign them to categories and connect them with lines — all in a freely rotatable space.

• Add stakeholders — enter a name, choose a category and add the node in the 3D view.
• Connect — use “Link nodes” and click two nodes one after the other, or use the connections form.
• Score — set influence, interest and support per stakeholder; the decision tool ranks who needs attention.
• Export — save your map as JSON, or export it as PNG, PDF or a video tour.
• Your data stays in the browser session and is lost after closing the tab unless you export it.

SubnetCalc

SubnetCalc calculates IPv4 and IPv6 subnets in your browser.

• Enter an address — type an IPv4 address like 192.168.1.5/24 or an IPv6 address like 2001:db8::1/64.
• Prefix — adjust the prefix length with the slider or the +/− buttons; the subnet mask updates automatically for IPv4.
• Results — network, broadcast, first and last usable host, usable host count, wildcard mask and binary breakdown.
• Subnet plan — divide the network into smaller subnets and list them all in a table.
• Presets — one click loads common private-network examples.

NetTool

NetTool is a collection of browser-based network diagnostics.

• Ping & traceroute — real ICMP measurements from a public probe network, no local install needed.
• DNS lookup — query A, AAAA, MX, TXT, SOA, PTR and more records for any hostname.
• Reverse DNS — look up the PTR record for an IPv4 or IPv6 address.
• WHOIS / RDAP — get registration information for domains and IP addresses.
• Note: lookups are sent to public services (DNS, WHOIS/RDAP and the probe network) — see the Disclaimer.

Data & privacy

StakeMap 3D and SubnetCalc run entirely in your browser and transmit nothing. No account, no tracking, no personal data is collected. Only the number of page views per day is counted for the hit statistic. See the Disclaimer for details.