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.
Content reviewed October 2026 · About Toolzum
Generate formatted serial numbers with prefixes, segments, and checksums for products and licenses. Create 1000 trackable SKUs in one batch — local, free, no signup.
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 numeric PINs in fixed lengths (4, 5, 6, 8, or 10 digits) for everyday codes and test data. Code never leaves your device — generation runs locally in your browser.
Generate Windows icon files from GIF images in batch. Create animated-style favicons or extract frames as icon resources from your GIF library. Everything runs locally in your browser — nothing is uploaded.
Turn a CSV of URLs or text into styled QR PNGs in one batch — event badges, inventory labels, menus. Free tier generates 5 QR a day; Pro runs up to 100 per batch — local qrcode work.
Prefix plus readable chunks (WELCOME-10-X7K2) beat pure random strings — customers type them correctly from ads. Keep under 16 characters for mobile entry.
Sufficient entropy per code plus single-use server validation: 8+ random characters resists enumeration, and redemption checks stop sharing abuse.
Yes — distinct prefixes per channel (EMAIL-, INSTA-) attribute redemptions in analytics. Generate separate batches per campaign.
No — generation runs locally in your browser. Lists never leave your device.
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.
License Key Generator
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.