Technology
Work with web assets, networks, storage, CSS units, passwords, and cryptographic hashes.
RAID Capacity Calculator
Estimate usable storage, parity or mirror overhead, efficiency, and disk-failure tolerance.
IPv4 Subnet Calculator
Find an IPv4 network address, CIDR block, subnet mask, broadcast boundary, usable range, wildcard mask, and binary breakdown.
PX to EM & REM Converter
Convert CSS pixels, em, and rem with separate EM and root font-size bases, instant equivalents, and batch conversion.
iPhone Storage Calculator
Estimate which iPhone storage capacity fits your current usage, future photos, videos, apps, files, downloads, ownership period, and preferred free-space buffer.
Secure Password Generator
Create strong random passwords locally with Web Crypto, length controls, and selectable character sets.
Favicon and Web-App Asset Pack Generator
Generate PNG favicons, a multi-resolution ICO, Apple touch and PWA icons, maskable assets, HTML links, and a configured web manifest.
SHA-256 Hash Generator & Checksum Checker
Generate SHA-256, SHA-384, or SHA-512 for exact text or a local file, then verify raw hashes and common checksum-file lines.