Random Number Generator
NewCryptographically-secure random integers — unbiased, local.
See how it works
Watch a quick simulation of this tool in action — no file needed.
How to use Random Number Generator
Follow these steps — everything happens instantly in your browser.
- 1
Step 1. Set min and max (inclusive).
- 2
Step 2. Pick how many numbers you want (1–10,000).
- 3
Step 3. Toggle Unique if you need a draw without repeats.
- 4
Step 4. Click Generate — copy or download as .txt.
Why use this tool
Private by design
All processing happens locally in your browser. Open DevTools → Network and you'll see zero file uploads. Ever.
Instant
No upload wait, no queue, no server round-trip. Results appear the moment you drop a file.
Free & unlimited
No accounts, no watermarks, no daily caps. Use it as many times as you like, forever.
Works everywhere
Desktop, tablet or phone — every tool is responsive and installable as a PWA for offline use.
Frequently asked questions
Everything you might want to know about random number generator.
UUID Generator
Generate cryptographically-secure UUID v4s — bulk & instant.
Username Generator
Generate memorable usernames — adjective+noun, leetspeak, full names.
Fake Data Generator
Generate fake JSON, CSV or SQL records for testing — 18 fields.
Hash Generator
Compute SHA-1, SHA-256 and SHA-512 hashes — locally.