Generate formatted software license keys from any X-template with dash separators. Issue random XXXX-XXXX keys for mock releases — local generation, free, no signup.
Content reviewed October 2026 · About Toolzum
Generate random tokens in hex, base64, or alphanumeric formats for secrets and sessions. Hex and base64 draw from Web Crypto (alphanumeric uses Math.random — see format notes). The API-key preset mints 64-char secrets in one click — local generation, free, no signup.
Generate realistic mock JSON from field specs — names, emails, dates, nested objects. Fill frontends before backends exist — local generation, free, no signup.
Generate RSA key pairs (2048/4096-bit) using the Web Crypto API. Export public and private keys as PEM strings. All client-side, no server uploads.
Generate random CSV rows or JSON lines for fixtures and tests — pick a format and row count. Seed mock data fast — local generation, free, no signup.
Generate random MAC addresses for labs and testing — pure random hex, no OUI or unicast-bit management. Fill virtual networks credibly — local generation, free, no signup.
Default is 5×4 (XXXXX-XXXXX-XXXXX-XXXXX); presets also ship 4×3 compact and 5×5 long, or type any template where X means a random character. The charset is always full A–Z0–9 (36 characters, ambiguous 0/O and 1/I included) — the tool itself cannot exclude lookalikes.
Characters draw via Math.random from A–Z0–9, not cryptographic randomness — fine for mock keys and demos. Real licensing must issue and verify keys server-side, since any client-side pattern reverses quickly.
No checksum feature exists — output is purely random characters wherever the format template has X (default XXXXX-XXXXX-XXXXX-XXXXX). Keep segments short for typo resistance on your side; the tool validates nothing.
No — generation runs locally in your browser. Keys never leave your device — register issued keys in your own system.
Serial Number Generator
Generate formatted serial numbers with prefixes, segments, and checksums for products and licenses. Create 1000 trackable SKUs in one batch — local, free, no signup.
Coupon Code Generator
Generate memorable coupon codes in bulk with prefixes and exclusions — WELCOME10-style campaigns. Create 500 trackable codes in one batch — local generation, free, no signup.