Subnet Calculator

Name: Subnet Calculator
Author: Simple Extensions

Simple IP subnet calculator

As of June 2026, Subnet Calculator has — users in the Education category.

Simple Extensions Education

Chrome Web Store ↗.crx

Users0%

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Rating0%

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— reviews

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Version

1.0

Manifest V3

History

2 snapshots

Tracking since Apr 16, 2026.

Not enough history yet for this metric — the chart fills in as we collect more snapshots.

View as table

Date	Users	Rating	Reviews	Version
Apr 16, 2026	—	—	—	1.0
Apr 27, 2026	—	—	—	1.0
Now	—	—	—	1.0

Permissions & access

Permissions: None declared
Host access: None declared

Screenshots

About

📘 IP Subnet Calculator – Chrome Extension

IP Subnet Calculator is a fast and easy-to-use Chrome extension designed for students, network engineers, IT professionals, and anyone learning computer networking.

It instantly calculates:

• Subnet mask
• Network address
• Broadcast address
• First & last usable IP
• Total and usable hosts
• Wildcard mask

With built-in input validation and smart warnings, it helps avoid common subnetting mistakes and explains special cases like /31 and /32 networks.

🚀 Key Features

✅ Accurate subnet calculations in one click
✅ Advanced IP & CIDR validation
✅ Reserved network warnings (loopback, multicast, etc.)
✅ Clean and lightweight popup interface
✅ Works fully offline
✅ No ads, no tracking

Perfect for quick subnet checks while studying, configuring routers, firewalls, or cloud networks.

🤖 Built With ChatGPT

This extension was created using ChatGPT — all core code and logic were generated with the help of ChatGPT to demonstrate the power of AI-assisted development.

🔐 Privacy

This extension does not collect, store, or transmit any user data.
All calculations happen locally in your browser.