OldWeb Tools

Fast, simple, offline-ready utilities for network engineers and system administrators

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Network Tools

IP and subnet calculators, CIDR converters, and network planning utilities for network engineers.

Subnet Calculator • IPv6 Subnet Calculator • Subnet Planner • CIDR Converter • Bit Calculator • Data Transfer Calculator

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System Tools

Unix/Linux system administration utilities including permissions, cron scheduling, disk planning, and log analysis.

Chmod Calculator • Cron Builder • DISK Tools • IOPS Calculator • Password Generator • Regex Tester • Log Timestamp Converter

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Data Tools

Data encoding, hashing, and format conversion utilities for developers and security professionals.

Base64 & Hash Tools

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Financial Tools

Loan and mortgage calculators for financial planning, payment schedules, and interest analysis.

Amortization Calculator

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Productivity Tools

Time management and focus utilities to help you stay productive and organized.

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