Utilities / Numbers
Random Number Generator
Roll one number or a whole batch, inside any range you set. Control duplicates, sort the output, and see the sum, average, and min/max at a glance. Copy or save your results — no sign-up, no ads, works offline once loaded.
Press Space to roll · Works offline once loaded
How it works
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Set your range
Enter a minimum and maximum value — or tap a quick preset like 1–100 or Lotto 1–49. The generator only returns whole numbers inside that range, inclusive of both ends.
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Choose quantity and duplicate rules
Generate one number or up to 100 at once. Switch duplicates off if you need a unique set — raffle winners, draft order, or lottery picks. Sort ascending or descending if order matters.
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Roll, then copy or save
Press Roll or tap the Spacebar. Each number appears as a tappable chip — click any one to copy it, or use the main Copy and Save buttons for the whole batch. The stats row shows sum, average, and min/max instantly.
Built for real use cases
Raffles & giveaways
Pull unique winner numbers from a ticket range with no repeats.
Sampling & testing
Generate batches of integers for spreadsheets, QA data, or statistics work.
Games & classrooms
Pick teams, seating, or turn order fairly and instantly.
Any device
Fully responsive layout with touch-friendly controls on phones and tablets.
When to use a random number generator
A random number generator is one of those tools you never think about until you actually need one. Here are the most common situations where people reach for it:
- Picking giveaway winners. If you ran a contest and collected ticket numbers 1 through 500, set the range and quantity to pick one or more winners without bias. Turn duplicates off to make sure the same person isn't picked twice.
- Shuffling a list of names. Assign each person a number, then generate a unique set to determine speaking order, seating, or turn order in a meeting or classroom.
- Lottery-style number picks. Use the Lotto 1–49 or Powerball 1–69 presets to quickly draw a set of unique numbers for a lottery ticket or a friendly office pool.
- Generating sample data. Developers and analysts need realistic-looking integers to fill a spreadsheet, database table, or mock API response. Generate a batch of up to 100 in one go.
- Rolling dice (digitally). Set the range 1–6 for a standard die, 1–20 for a D20, or any other range for tabletop games and RPG sessions.
- Choosing between options. Number your options 1 through N and generate one number to break a tie or make a decision without overthinking it.
- Practicing statistics. Generate batches of numbers and use the sum and average stats to explore how the mean behaves as your batch grows.
How random is "random"?
This tool uses Math.random(), the built-in pseudo-random number generator that ships with every modern browser. Each number has an equal chance of being drawn within the range you set. Over many rolls, the distribution should be roughly even across all possible values.
That said, Math.random() is called "pseudo-random" for a reason. It is deterministic given a starting seed, and the sequence it produces is not suitable for cryptography. For games, raffles, classroom activities, lottery-style picks, and everyday decisions, it is perfectly adequate. For anything security-critical — password generation, cryptographic keys, financial transactions — use a dedicated tool built on crypto.getRandomValues() instead.
You can prove the fairness of this tool to yourself. Set the range to 1–6, set quantity to 100, turn duplicates on, and roll a few times. Watch the sum stat — it should hover near 350 (which is 100 × 3.5, the expected average roll of a six-sided die). That is the law of large numbers at work.
If you need unique numbers for a raffle, set Duplicates to "Not allowed" and your quantity to the number of winners you need. The tool will guarantee no repeats. But keep an eye on your range — picking 50 unique numbers from a range of only 40 values is impossible, and the tool will warn you before wasting your time.
Why we built this tool
Most free random number generators online are packed with ads, drop your results into a wall of noise, or lock the useful features (unique numbers, batch generation, sorting) behind a sign-up. This one doesn't. It runs entirely in your browser, stores nothing on a server, and every control is visible on a single screen.
We use it ourselves for internal giveaways, code sample data, and picking who gets to choose the lunch spot. If you spot a bug, or you want a preset range added for a specific use case, drop us a line using the contact link at the bottom of the page.
Frequently asked questions
Is this random number generator truly random?
It uses your browser's built-in pseudo-random number algorithm (Math.random), which is suitable for games, contests, raffles, and everyday decisions. It is not intended for cryptographic or security-critical use — for those, you need a cryptographic random source like crypto.getRandomValues().
Can I generate numbers without duplicates?
Yes. Set the Duplicates dropdown to "Not allowed (unique)" and each number in the batch will appear only once. This is perfect for raffle winners, draft order, or lottery-style picks. Just make sure your range is at least as large as the quantity you request — picking 10 unique numbers requires a range of at least 10 possible values.
What is the maximum quantity I can generate at once?
You can generate up to 100 numbers in a single roll. For unique sets, the range must contain at least as many possible values as the quantity you ask for. If you need more than 100 numbers at once, generate several batches and combine the results — the copy and save buttons support the full batch.
Can I save or export my results?
Yes. Use the Copy button to send the batch to your clipboard, or the Save button to download a plain .txt file. You can also click any individual number chip in the result area to copy just that number — handy when you only need one value out of a long batch.
Does this tool work on mobile devices?
Yes. The layout adapts to phones, tablets, and desktops, and every control uses touch-friendly sizing. On desktop, you can also press the Spacebar to roll numbers instantly without moving your mouse to the button.
What do the Sum and Average stats show?
When you generate more than one number, a stats row appears below the results showing the total sum, the average value, the smallest number, and the largest number from the batch. This is useful when you are generating test data and want a quick sanity check on the distribution, or when you are running a statistics exercise with students.