Utilities & Reference

Evaluate a math expression and return the number. Supports + - * / ** % and parentheses plus functions like sqrt, log, sin, factorial.

Convert a value between units — length (m,km,mi,ft,in), mass (kg,lb,oz), data (mb,gb,gib,tb), time (s,min,h,day), speed (kph,mph,knot), area (sqm,sqft,acre,hectare), volume (l,ml,gal,cup,floz), energy (j,kj,cal,kcal,wh,kwh,btu), power (w,kw,hp), pressure (pa,bar,psi,atm,mmhg), frequency (hz,khz,mhz,ghz), and temperature (c,f,k).

Date & time math: the current UTC time, days between two dates, date arithmetic, weekday lookups and Unix-timestamp conversion.

Text utilities, processed on-device: word/character/line counts, case conversion, slugify, reverse, JSON pretty-print & validation, line sorting & de-duplication and more.

Answers networking questions without touching the network: subnet/CIDR breakdowns, IP classification (private, public, reserved), well-known port names, MAC-vendor prefixes and more.

Security and encoding helpers, computed locally: SHA-256 hashing, Base64/Base32/hex encode & decode, CRC32, ROT13, entropy measurement, password strength rating & secure password generation, Luhn card-number checks, JWT decoding and UUIDs.

Plain-English reference lookups — what a port number is used for, what an HTTP status code means, what a file extension is — answered instantly, no internet needed.

Instant macOS reference facts: what a privacy permission like Full Disk Access actually covers, what system folders are for, and other exact answers — deterministic, no Mac access needed.

Reads the exact manual (man page) for a Terminal command from your own Mac — the copy installed with your macOS version — so a flag is checked rather than recalled. Returns the name, synopsis and opening description, or one flag's own entry and whether this Mac's manual defines it at all. Local, no network.

Shows you a Terminal command to run yourself, as a card with Copy and Open Terminal buttons — Cyclone never runs it. Before it is shown, Cyclone checks it against your Mac: each program must be installed, each flag is checked against this Mac's own manual, and the risk is judged in code (read-only, changes settings or files, or deletes data / cannot be undone), with admin and Recovery needs marked. Commands that would erase the startup disk, delete your home folder, pipe a download into a shell or switch off macOS protections are refused outright.

Runs one read-only Terminal command from a fixed allow-list on your Mac and reads the output — system_profiler, diskutil list, pmset -g, networksetup -get…, defaults read, launchctl list, tmutil status and the like. No shell, no pipes, no sudo, nothing that changes anything; every argument is checked against the shape that command accepts, and secret-shaped values are masked before the output is read.