Free random generators, pickers, dice, coins and team makers that run entirely in your browser. Every draw uses your browser's cryptographic random source by default, with seeded mode when you need a result you can reproduce and verify. Nothing you paste is uploaded.
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Start from what you are trying to do
- Run a giveaway people can checkA winner drawn from a published seed, so entrants can verify the draw themselves.3 steps, starting with Verifiable Random Draw Generator
- Set up a tournamentA draw, a schedule of fixtures, and an order of play.3 steps, starting with Tournament Matchup Generator
- Set up a lessonTeams, a seating plan, an order of presentations, and a fair way to pick who answers.4 steps, starting with Random Team Generator
- Generate test data for a fixtureA realistic JSON fixture you can drop into tests.4 steps, starting with Random Test Data Generator
Random Numbers
- Random Number GeneratorGenerate random numbers in any range, instantly and in your browser.
- Random Number Sequence GeneratorGenerate an ordered sequence of numbers with a chosen start, step and length, then shuffle it or keep it in order.
- Seeded Random Number GeneratorGenerate numbers that anyone can reproduce from the same seed.
- Secure Random Number GeneratorGenerate numbers from your browser's cryptographic random source with no way to weaken it — this tool deliberately offers no seeded or fast mode.
- Random Boolean GeneratorGenerate random true/false values for test data, feature flags and simulations, with control over how often true comes up.
- Random Binary GeneratorGenerate random binary strings of any length, with the decimal value shown alongside.
Pickers and Decisions
- List RandomizerPaste any list and get it back in a uniformly random order.
- Random Item PickerPaste a list and let the picker choose for you.
- Random Name PickerPick a name at random from any list — for classrooms, standups, prize draws or deciding who goes first.
- Wheel SpinnerA spinning wheel for names, prizes, choices or chores.
- Yes or No GeneratorGet an instant Yes or No answer, with optional Maybe and "Ask again later" options.
- Weighted Random PickerPick from a list where some entries are more likely than others.
- Random Picker Without RepeatsDraw several entries from a list with no entry appearing twice.
- Random Pair GeneratorSplit a list of names into random pairs, or arrange a Secret Santa where everybody gives to exactly one other person and nobody draws themselves.
- Random Task AssignerShare a list of tasks out among a list of people at random, either dealt evenly so workloads differ by at most one, or drawn independently.
Just for Fun
- Random Activity PickerStuck for something to do? Paste your options — or start from a ready-made list for an evening in, a rainy day with children, or a ten-minute break — and let the tool choose.
- What Should I EatSettle the "what shall we eat" question in one click.
- Truth or Dare PickerDraw truth or dare prompts at random, or add your own so the game fits the people playing.
- Rock Paper Scissors GeneratorGet a random rock, paper or scissors throw — useful when you need an impartial opponent, or a starting hand that cannot be read from a habit.
Dice, Coins and Cards
- Flip a CoinFlip a fair coin online — once, a hundred times, or as a best-of-three series.
- Dice RollerRoll any dice using standard notation — 2d6+3, 4d8, d20, or several dice types at once.
- D20 Dice RollerRoll a twenty-sided die with advantage and disadvantage built in — roll twice and keep the higher or lower, with the discarded die shown so the result is checkable.
- D100 Dice RollerRoll percentile dice — a single number from 1 to 100, the format used for percentage chances in tabletop games and random tables.
- D&D Dice RollerRoll ability scores as 4d6 drop lowest — six times, with the discarded die and the resulting modifier shown for each — or roll any attack, damage or healing expression in standard notation.
- Dice Probability SimulatorSimulate thousands of dice rolls and compare the result with the exact probabilities, which the tool calculates rather than estimates.
- Playing Card ShufflerShuffle a standard 52-card deck — optionally with jokers — using a Fisher–Yates shuffle driven by an unbiased integer source, so no ordering is favoured over another.
- Random Card DrawerDraw a number of cards at random from a standard deck, with no card drawn twice in the same hand.
Classroom
- Random Team GeneratorSplit any list of names into random teams or groups.
- Random Student PickerPick a student, a pair or a small group at random from your class list.
- Classroom Seating Chart GeneratorArrange a class into a random seating grid of any size, with optional rules to keep particular students apart.
- Random Presentation Order GeneratorPut people, groups or talks into a random running order — every arrangement equally likely, so nobody can argue the sequence was chosen.
- Random Topic PickerDraw a topic, question or writing prompt at random from your own list, or start from ready-made sets for science topics, debate motions, writing prompts and revision questions.
- Random Letter GeneratorGenerate random letters from the whole alphabet, consonants only or vowels only, with or without repeats.
- Student Participation TrackerPick students without repeating anyone until the whole class has had a turn.
Random Data
- Secure Password GeneratorGenerate strong passwords in your browser using its cryptographic random source.
- Random String GeneratorGenerate random strings of any length from the character sets you choose, or from your own custom alphabet.
- Secure Token GeneratorGenerate API keys, session tokens and other secrets with a stated entropy budget in bytes.
- UUID GeneratorGenerate UUIDs in version 4 (random) or version 7 (time-ordered), plus the nil and max special cases.
- Random Bytes GeneratorGenerate raw random bytes for keys, salts and initialisation vectors, formatted as hex, spaced hex, Base64, decimal or a C array.
- Random Hex GeneratorGenerate random hexadecimal values of any length, with optional uppercase and 0x prefix.
- Random Base64 GeneratorGenerate random Base64 strings from a chosen number of random bytes, with standard or URL-safe alphabets and optional padding.
- Random Date and Time GeneratorGenerate random dates and times inside any range, formatted as ISO 8601, date only, time only, Unix seconds, Unix milliseconds or a readable string.
- Random Coordinates GeneratorGenerate random latitude and longitude pairs inside a bounding box, exported as plain text, CSV or GeoJSON.
- Random IP Address GeneratorGenerate random IPv4 and IPv6 addresses, including the blocks reserved for documentation so an example can never point at a real host.
- Random MAC Address GeneratorGenerate random MAC addresses with colon, hyphen, dot or bare formatting.
- Random User Agent GeneratorGenerate synthetic user agent strings for Chrome, Firefox, Safari and Edge across desktop and mobile platforms.
- Random HTTP Status Code GeneratorPick random HTTP status codes from the IANA registry, filtered by family — informational, success, redirection, client error or server error.
- Random Test Data GeneratorGenerate synthetic records with the fields you choose, exported as CSV, JSON or SQL inserts.
- Random JSON Data GeneratorGenerate valid JSON in four shapes — an array of user objects, a nested object tree, a flat key/value map, or an API response envelope.
- Random Unicode Character GeneratorGenerate random characters from a chosen Unicode block — Latin, Greek, Cyrillic, CJK, arrows, mathematical operators, box drawing or emoji.
Giveaways and Contests
- Giveaway Winner PickerDraw winners from a list of entries with nobody selected twice.
- Verifiable Random Draw GeneratorRun a giveaway draw anyone can check.
- Prize Assignment GeneratorAssign different prizes to different winners at random, so no one person receives two and no prize is handed out twice.
- Tournament Matchup GeneratorDraw a knockout bracket from a list of players or teams.
- Round Robin Schedule GeneratorBuild a schedule where every team plays every other exactly once, using the circle method.
- Fantasy Draft Order GeneratorDraw a fair draft order for a fantasy league, with snake ordering that reverses every other round so the first pick is balanced by the last.
- Random Turn Order GeneratorDecide who goes first — and second, and third — with a shuffle where every ordering is equally likely.
- Bingo Number GeneratorCall bingo numbers in 75-ball or 90-ball format, drawn without replacement so no number comes up twice in a game.
- Lottery Number GeneratorGenerate lottery lines in common formats — 6 from 49, 6 from 59, 5 plus 2, 5 plus 1 — or set your own.
Frequently asked questions
Are these random tools free?
Yes — every tool here is free, needs no account and has no usage limits. They run entirely in your browser, so there is no server doing the work that would need to meter you.
What kind of randomness do these tools use?
By default they call crypto.getRandomValues, your browser's cryptographically strong random source, and convert its output using unbiased rejection sampling. Every tool also offers a seeded mode for reproducible draws and states on screen which engine produced the result.
Is this "true" randomness?
No, and we do not claim it is. True randomness requires a physical entropy source such as radioactive decay or atmospheric noise. Browser cryptographic randomness is a CSPRNG seeded by operating-system entropy — unpredictable in practice and appropriate for prize draws, but not a physical process.
Can I reproduce a draw to prove it was not re-rolled?
Yes. Switch any tool to Seeded mode, enter a seed and record it. Anyone with the same list, settings and seed can repeat the draw exactly and confirm the result, which is the practical way to make a giveaway auditable.
Do my lists, names or results get uploaded?
No. Everything is computed in your browser, nothing is transmitted, and the list-based tools deliberately keep entries out of shareable links so a URL you paste to someone cannot expose your participants.
Which tool should I use to pick a winner?
For a quick draw from a pasted list, use the Random Name Picker or Random Item Picker. For something visual to show an audience, use the Wheel Spinner. For a draw others may want to verify, use seeded mode and publish the seed.
Do these tools work on phones?
Yes. The layouts are responsive and touch-friendly, and every tool works the same way on mobile as on desktop, including offline once the page has loaded.
Every random tool in one place
This hub collects the random generators, pickers, dice, coins and team makers on Justwebworld. Everything runs in your browser: nothing you paste is uploaded, no account is needed, and the pages keep working offline once loaded.
Every draw on this page starts with crypto.getRandomValues, the cryptographically strong random source built into your browser. That is a CSPRNG seeded from operating-system entropy: unpredictable in practice, and the right choice when a result decides something that matters. It is deliberately not described as “true randomness”, which would require a physical entropy source such as atmospheric noise or radioactive decay. Tools that claim true randomness from a browser are overstating what the platform provides.
What makes these different
Most random tools online are a thin wrapper around Math.random() with a modulo. That is fine for casual use and quietly wrong for anything else. The tools here take three things seriously that similar pages usually skip.
- Unbiased conversion. Turning random bytes into a range uses rejection sampling, not modulo, so no value is more likely than another.
- Correct shuffling. Ordering uses Fisher–Yates, not the widely copied random-comparator sort, which is measurably biased.
- Honest language. Browser cryptographic randomness is described as cryptographically strong, never as “true randomness”, which would require a physical entropy source.
Choosing the right tool
The categories map to the question you are actually asking. Number generators answer “what number?”. Pickers answer “which one?” from a list you paste. Dice, coin and card tools answer “what did I roll?” with the probabilities explained. Classroom randomizers answer “who?” and “which group?” while keeping student names on your device.
Reproducible draws
Every tool offers a seeded mode. Enter any word or number as a seed and the same settings will always produce the same result. For a giveaway or a classroom split, that is the practical way to make a draw verifiable: publish the seed and the entry list, run the draw, and anyone can repeat it exactly and confirm you did not re-roll.
Privacy
Lists, names and results are processed locally and never transmitted. The list-based tools go further and deliberately keep entries out of shareable links, because wheel entries and class lists are frequently people’s names and a URL that carried them would leak participant data to anyone the link reached.
Reading what a tool reports back
Alongside the result itself, each tool reports how the draw was produced, so you can tell at a glance what you are looking at.
- The method note appears under every result and states which source produced it: the browser’s cryptographic generator, or the seed you supplied. If you are publishing a result, this is the line worth quoting.
- The counts summarise what was actually considered — how many entries were read and how many were selected. If a list looks like it lost an entry, this is where it shows.
- A draw reference accompanies results from the item and name pickers. It is a short label for one specific draw, useful when referring to it in a message or a spreadsheet. It is not a seed and cannot be used to reproduce the draw; only seeded mode does that.
Working with results outside the browser
Every tool gives you its result as plain text, which suits pasting into a message or a slide. Most also offer CSV for opening directly in a spreadsheet, and entries beginning with a character a spreadsheet would treat as a formula are prefixed with an apostrophe so they are read as text rather than executed. Where the result has structure worth preserving — the number generator’s draws, the team generator’s groups — JSON is offered as well, which is the format to choose when a result feeds into another script. Some tools add a format specific to what they produce, such as the picker’s list of entries that were not selected, or the wheel’s remaining entries after a spin. Every format is produced in the page, so exporting a result involves no upload.
