What this app generates
covr4 · random is a minimalist random-data generator. Every value is
produced in your browser using the Web Crypto API (a cryptographically
secure pseudo-random number generator) — no server, no analytics, no
cookies, no tracking. The following generators are available:
- Coin flip — a single cryptographically-random bit with configurable labels (0/1, H/T, T/F, Y/N).
- MD5, SHA-1, SHA-256 — real digests of 64 freshly-random bytes.
- UUID — RFC 4122 version 4 (random) and RFC 9562 version 7 (time-ordered).
- US phone number — NANP-compliant with valid area codes and exchange prefixes.
- US ZIP code — sampled from a curated list of real USPS ZIPs covering all 50 states plus DC.
- US SSN — area number sampled from the pre-2011 SSA allocation table; decoded back to historical state.
- Geographic coordinates — land-area-weighted latitude / longitude drawn from US sovereign territory: all 50 states and DC, the five inhabited territories (Puerto Rico, US Virgin Islands, Guam, American Samoa, Northern Mariana Islands), the nine minor outlying islands (Midway, Wake, Johnston, Palmyra, Kingman, Baker, Howland, Jarvis, Navassa), and 12 nautical-mile territorial waters for coastal entities.
- IPv4 and IPv6 addresses — reserved and private blocks excluded by default, with optional IPinfo enrichment.
- ASN — uniformly sampled from a curated dataset of major autonomous system numbers.
- DUNS — Dun & Bradstreet 9-digit identifier sampled from a curated dataset of real organizations, with offline lookup returning the company name, HQ city and state, and NAICS sector.
- Name — US English first and last name.
- Codename — NSA ANT-catalog-style uppercase codenames.
- Phrase — grammatically-correct, odd English phrases built from a curated common-noun / adjective / verb lexicon.
- Random overview — one value from every other generator, displayed as a single scannable list.