100% Client-Side

IP Address Tools

Free online IP address tools. Calculate subnets, convert CIDR notation, and analyze IPv4 and IPv6 addresses directly in your browser. — runs 100% in your browser, client-side only. No data is sent to any server. Free to use, no account required.

Free Client-Side No Login No Storage
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HTTP Header Parser Parse and analyze raw HTTP request or response headers Number Base Converter Convert numbers between binary, octal, decimal, and hexadecimal

How to Use the IP Address Tools

  1. Enter an IPv4 address with optional CIDR notation (e.g. 192.168.1.0/24).
  2. Click Calculate for full subnet details.

Shows network/broadcast addresses, host range, total hosts, IP class, private range detection, and binary representation.