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Free Random Number Generator — Integers, Dice, Coins & UUID

Generate random integers, floats, dice rolls, coin flips and UUIDs. Set custom min/max range, generate up to 100 numbers at once. Uses Web Crypto API for security.

✅ Free⚡ Instant🔒 No Data Stored📱 Mobile Ready
🎲Random Number Generator — Live Tool

Use the free calculator below. No signup, no download, instant results.

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5 Generation Modes

  • Random Integer: A whole number within your specified min/max range. Set both endpoints and generate 1–100 at a time.
  • Random Float: A decimal number within the range, shown to 4 decimal places. Useful for simulations and probability work.
  • Dice Roll (1–6): Simulates a standard 6-sided die. Generate multiple dice at once for board games or D&D.
  • Coin Flip (H/T): Generates Heads or Tails. Generate multiple flips to test probability.
  • UUID v4: Generates a cryptographically random 128-bit universally unique identifier in standard format (xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx). Used in software development for unique IDs.

True Random vs Pseudorandom

Our generator uses window.crypto.getRandomValues() — the browser's cryptographically secure pseudorandom number generator (CSPRNG). This is seeded from OS-level entropy sources (hardware events, timing, etc.) and is suitable for security applications. It is not a true physical random number generator but is statistically indistinguishable from one for all practical purposes.

💡 For lottery numbers, board games, statistical sampling, random assignment in research, or any application requiring unpredictability — this generator is appropriate and secure.

Common Use Cases

  • Pick lottery or raffle winners fairly
  • Generate test data for software development
  • Random sampling for research and surveys
  • Decide outcomes in games without physical dice
  • Generate unique IDs (UUIDs) for database records
  • Create random passwords (use our Password Generator for this)

Frequently Asked Questions

Yes. You can toggle between generating random integers and random float numbers within your specified range.
Selecting the dice mode generates random numbers between 1 and 6, simulating physical dice rolls.
Yes, selecting the UUID generator mode produces standard Version 4 UUID strings instantly.

🎲 Generate random numbers, dice rolls, coins or UUIDs instantly

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