Introduction
SoftPerfect IP Calculator is a free desktop application for IPv4 and IPv6 subnet calculations. It provides detailed network and mask information, a binary bit visualisation of all address bits, interactive subnet planning with split/join, and specialised tools for VLSM allocation, route summarisation, and overlap detection.
The application supports 26 languages, light and dark themes, and runs on Windows, macOS and Linux. Results can be exported to CSV or HTML, and networks can be loaded from text files. No installation is required (a portable version is available), and there are no subscriptions or external dependencies.
Key features
- Subnet calculator — Comprehensive IPv4 and IPv6 network details including CIDR notation, host ranges, wildcard mask, scope and class.
- Binary bit visualisation — Colour-coded display of all 32 or 128 address bits with an interactive prefix boundary.
- Subnet planning — Enumerate subnets and split/join them on a proportional bar chart to design custom layouts.
- VLSM calculator — Allocate variable-length subnets from a parent network based on host requirements.
- Route summarisation — Consolidate CIDR networks into the smallest set of summary routes.
- Overlap detection — Identify containment, identity and overlap relationships between networks.
- Export and import — CSV and HTML export; load networks from text files.
- Cross-platform — Windows (32/64-bit, ARM64), macOS, and Linux.
Supported platforms
- Windows 7 and later (32-bit, 64-bit and ARM64)
- macOS 11 Big Sur and later (Intel and Apple Silicon)
- Linux (x86-64 and ARM64, DEB and RPM packages)