guest@spears.network: ~/tools — bash online

type help · ls · cd posts

interactive shell ready — type help to list commands.

guest@spears.network:~/tools$

tools/

In-browser IT & privacy utilities. Everything runs client-side — nothing you enter is sent to a server.

Tip: each tool installs as its own app — open a tool and use Add to Home Screen (phone) or Install (desktop) to launch straight into it, offline. Installing from this page adds the whole toolbox instead.

Networking

Subnet Calculator IPv4 subnet / CIDR breakdown

DNS Lookup Encrypted DNS-over-HTTPS queries

Wi-Fi QR Code Share a network without reading out the password

Download Time Calculator How long a file takes to transfer

IPv6 Expand / Compress Normalize, expand, and compress IPv6

Subnet Cheat Sheet CIDR prefix, mask, and host reference

Common Ports Searchable well-known TCP/UDP ports

HTTP Status Codes Searchable HTTP status code reference

Encoding & Data

QR Code Generator Turn any URL or text into a QR code

Base64 Encode / Decode Encode or decode text locally

URL Encode / Decode Percent-encode or decode URL-safe text

Data Size Converter Convert bytes, KB, MB, GB, TB, PB

Timestamp Converter Convert between Unix time and human dates

UUID Generator Generate random v4 UUIDs

Number Base Converter Convert hex, decimal, binary, octal

Security

Checksum Verifier Verify file hashes locally

Password Generator Generate or check a password

JWT Decoder Decode a JSON Web Token

Passphrase Generator Memorable Diceware-style passphrases

Text Hash MD5 and SHA hashes of any text

Fitness

One-Rep Max Calculator Estimate your 1RM and training percentages

Strength Standards See how your lifts stack up

Barbell Plate Calculator What plates to load per side

Everyday

Sleep Cycle Calculator Wake between cycles, not mid-cycle

Tip Calculator Tip amounts, totals, and splits

Dice Roller Roll dice with any number of faces

Unit Converter Length, mass, temperature, volume, speed