imbizcorp
// TOOLS — 6 tools

IT tools that run right in your browser


We built these tools for the calculations and checks we used every day to design and protect enterprise networks. There is nothing to install and no account to create. Your input is not sent to our server. Each tool explains when to use it and how to read the results.

tools — index
$ ls tools/ | wc -l
out 6
$ stat --network
out 0 inputs sent — Everything stays in your browser
$
6Tools you can use nowPublished tools only
18Articles with tool linksArticles with tool links in the body
4Topics with tool linksArticles and tools together on topic pages

All tools

// ALL 6

Browse the tool names and descriptions below, then choose the tool you need.

Choose the subnet calculator for the network range or host count of one address, and the CIDR calculator for containment and aggregation across multiple blocks. Use My IP to inspect the public address visible from your connection, and MAC vendor lookup for prefix assignment information.

For documents, choose the direction you need: Markdown to HTML or HTML back to Markdown. Before using a result, read the examples and limitations and check the reference date for lookup data. Local browser calculations and connection-information requests to a server are different types of processing.

$ cidrCIDR calculator

Enter an address block in any supported format and see everything in one place. The…

7 articles · 2 tools$ html2md.html → .md converter

Convert copied web content or HTML to Markdown (.md). Paste source code, paste content…

1 tool$ mac-ouiMAC vendor lookup

Use the prefix of a MAC address (such as an OUI) to look up its assignee. Check…

3 articles · 1 tool$ md2html.md → .html converter

Enter Markdown (.md) to preview the result as you type, then save it as a single .html…

1 tool$ myipCheck my IP address

See the public IP address you are using to access the internet, along with connection and…

2 articles · 2 tools$ subnetIP subnet calculator

Select either a prefix or a subnet mask. The other updates automatically, and the…

18 articles · 3 tools

How we build these tools

// HOW

We care more about whether you can rely on a tool than how many tools we offer. That is why we follow three principles.

01

Your input never leaves your browser

All calculations run on your device. Even if you enter an internal IP range, a configuration file, or a token, it never reaches our servers. It is not just that we do not store it—we never receive it.

02

We check results against published specifications

We check subnet and CIDR results against the prefix notation and address block sizes in RFC 4632. For the conditions under which both addresses in a /31 can be used as host addresses, we refer to the point-to-point link requirements in RFC 3021.

03

We explain the principles behind the results

Each tool includes guidance on when to use it and how to read the results, plus answers to common questions. For a closer look, follow the links to our articles.

Browse by topic

// TOPICS All topics →

Categories group tools by type; topics group them by what you want to do. Each topic brings together tools for the task and articles explaining it. For example, the IP address topic includes a CIDR calculator and an article explaining CIDR notation.

We publish a topic once it has two tools and three articles on the same subject.

Only finished tools appear in this list. We do not link to unfinished tools labeled "coming soon"—so you never click through to an empty page.