Random

Flip a coin one or ten thousand times — see the heads/tails ratio, the longest run, and (for small samples) the full sequence.

Generate batches of random IPv4, IPv6, or MAC addresses for tests and mocks — public / private / ULA / link-local / UAA / LAA scopes supported.

Pick N random dates between two boundaries — with options for unique-only, sorted, and weekdays-only.

Generate a fully fake person — name, email, phone, address, date of birth, company — for placeholder content, mockups, or test data.

Pick a quote at random from a curated collection — wisdom, motivation, humor, tech, life — and copy it with one click.

Generate random tickets for 8 popular lotteries (Powerball, EuroMillions, Lotto 6/45, Loto 6, 双色球…) — uses crypto-secure RNG.

Generate a scannable QR code that joins a WiFi network — print it for guests, no app needed.

Memorable, high-entropy passphrases from a curated word list — generated with Web Crypto, never sent anywhere.

Generate cryptographically random numbers in any range — with or without duplicates, optionally sorted.

Split a list of names into balanced random groups — pick the group count or the people per group.

Pick N winners from a list of names — cryptographically random, with or without duplicates.

Roll polyhedral dice (d4–d100) or flip a coin with cryptographic randomness.

Paste a list of participants and instantly get a properly seeded single-elimination bracket — with BYE handling for non-power-of-2 counts, three seeding modes (as entered / alphabetical / random with reseed), and copyable Markdown export. All client-side.

Generate printable mazes with adjustable size, cell scale, and reproducible seed — recursive-backtracking algorithm with optional solution overlay.

Generate a full round-robin pairing schedule where every participant meets every other participant exactly once — using the classic circle method.

Generate Docker-style memorable nicknames (`elegant-archimedes`, `funny-curie`) — pick a style, separator, count. Useful for test data, anonymous handles, container/branch names.

Generate cryptographically secure random bytes in 9 output formats — hex, Base64, Base64URL, binary, decimal, C array, Python bytes, UUID v4.

Pick random emojis from 10 categories — smileys, people, animals, food, activities, travel, objects, symbols, nature, weather. Pick 1-200 with configurable separators.

Generate samples from uniform, normal, exponential, Poisson, Bernoulli, or triangular distributions — with histogram, summary stats, and CSV/JSON export. Powered by crypto.getRandomValues.

Generate fresh creative prompts for drawing, writing, photography, coding side-projects, or fictional world-building. Hit reroll for a new batch of structured, evocative prompts to break creative blocks.

Random key, scale, chord, tempo, time signature and technique focus for instrument practice — 12 chromatic roots, 15 scales (modes, pentatonic, blues, diminished, phrygian dominant), 14 chord qualities up to 9ths, and 20 articulation prompts.

Draw a random chess opening for study from 24 classical and modern openings, filtered by category (Open, Semi-Open, Closed, Flank), difficulty, and which side you'll play. Includes ECO codes, the first key moves, and a direct study link.

Randomly pair Secret Santa givers with recipients, with optional exclusion pairs (e.g. spouses, siblings) and hidden reveal cards so the host can run the draw without seeing anyone's match.

Pick names or options with custom weights — like a non-uniform raffle. See each option's true probability and draw with or without replacement.

Generates printable 3×3, 4×4 or classic 5×5 BINGO cards — number mode or your own word list, free-center optional, browser-print friendly.

Type your options, spin a colored wheel, get a winner — with optional remove-after-winning for raffles and history of the last 20 picks.

Type a yes/no question, shake the ball, get one of 20 classic answers — or swap in your own pool. Pure randomness, no judgement.

Play classic Rock-Paper-Scissors against a fair random opponent — keep score, track win/loss streaks, optional best-of-3/5/10 match mode.

Click the panel, wait for it to turn green, click again — get your reaction time in milliseconds. Tracks average, best, worst across the session.

Paste a list, get it back in random order — line-, comma- or whitespace-separated input, optional seed for reproducible runs, numbered or plain output.

Draw N cards from a properly shuffled 52-card deck (optional jokers), with deck-tracking so you don't draw the same card twice.

Generate uniformly-distributed random points on Earth, optionally restricted to a bounding box — with an OpenStreetMap link for each.

Pick a winner with a spinning wheel or a ladder (ghost-leg) draw.

Generate strong, random passwords that never leave your browser.