Does CIDR / Subnet Calculator upload my files to a server?

No. CIDR / Subnet Calculator runs entirely in your browser using on-device processing, your files never leave your device.

CIDR / Subnet Calculator

Calculate network address, broadcast address and usable host range for a CIDR block.

Runs in your browser

See it in action

Your inputReady to use

CIDR notation

Network address192.168.1.0

Broadcast address192.168.1.255

Subnet mask255.255.255.0

First usable host192.168.1.1

Last usable host192.168.1.254

Total addresses256

Usable hosts254

MIME Type Lookup

Look up the MIME type for a file extension, or vice versa.

File Converter

Convert data files between CSV, JSON and TSV.

JSON Formatter

Format, validate and minify JSON.

Base64 Converter

Encode or decode text and files as Base64.