DREAMS / TOOLKIT

Small tools.
Big focus.

Format JSON without losing large numbers and explore IPv4 networks. Free tools that run in your browser.

FreeYour input stays in this browser.

● ● ●hello.json

01{
02  "tools": ["JSON", "CIDR"],
03  "focus": "your next idea"
04}

Developer tools

02 / TOOLS

Free

IPv4 CIDR Calculator

Calculate IPv4 network addresses, subnet masks, broadcast addresses and host ranges. Supports /0, /31 point-to-point links and /32 hosts.

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Free

JSON Formatter

Format, minify and validate JSON in your browser. Preserve large integers and see syntax error locations without uploading your data.

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How it works

Choose a tool and enter your data. Calculations run locally, with no account or uploads. Use the language menu to change the interface without changing the URL.