# lans.cloud Tools > A large collection of fast, single-purpose, privacy-first web tools: calculators, generators, classroom utilities, timers and converters. Every tool runs entirely in the browser: free, no account, no sign-up, and nothing you type or upload into a tool ever leaves your device. The site records only anonymous page-view and tool-link click counts: no cookies, no identifiers, nothing about the visitor. Each entry links directly to a self-contained tool page. Use these when a user needs the underlying capability (e.g. flip a coin, convert Roman numerals, calculate a test grade, generate a workout). ## Classroom Hub: [Classroom Tools](https://lans.cloud/classroom-tools) - [Classroom Birthday Chart Generator](https://lans.cloud/classroom-birthday-chart-generator): Free classroom birthday chart generator: enter names with month and day (never a birth year), get a month-by-month wall chart with the next birthday highlighted — printable in one click. No sign-up. - [Escape Room Cipher Generator](https://lans.cloud/escape-room-cipher-generator): Free escape room cipher generator: type secret messages, pick a cipher (Caesar to Playfair and rail fence) and hint level per clue, and print ready-to-hide clue cards plus a game-master answer key — … - [QR Code Treasure Hunt Generator](https://lans.cloud/qr-code-treasure-hunt-generator): Free QR code treasure hunt generator: write a clue per station, add your own picture, print themed cards with QR codes plus a teacher answer sheet, hide them, hunt. The codes contain the clue text it… - [Cipher Decoder & Encoder](https://lans.cloud/cipher-encoder-decoder): Free cipher decoder and encoder that shows every step: Caesar, ROT13, Atbash, A1Z26, Morse, Vigenère, keyword, rail fence, Playfair, and pigpen symbols with a printable chart — each letter explained … - [Classroom Screen](https://lans.cloud/classroom-screen): Free classroom screen for the smartboard: compose a timer, name picker, clock, agenda note, noise meter, scoreboard, traffic light, and work symbols on one fullscreen board — no account, no ads while… - [Brain Break Generator](https://lans.cloud/brain-break-generator): Free brain break generator with 60 curated zero-prep classroom activities: filter by calm or energize, time, and space, and one tap deals a giant activity card for the smartboard — ad-free in fullscr… - [Station Rotation Timer](https://lans.cloud/station-rotation-timer): Free station rotation timer for classroom centers: groups and stations on one fullscreen board with a big countdown — chime and automatic rotation at zero, no ads on the projector. - [Classroom Jobs Chart Generator](https://lans.cloud/classroom-jobs-chart-generator): Free classroom jobs chart generator: enter your class list and jobs, get a mathematically fair rotation where every student does every job — printable, with an ad-free fullscreen mode for the smartbo… - [Classroom Seating Chart Generator](https://lans.cloud/classroom-seating-chart-generator): Free random seating chart generator with rules and four room layouts — rows, groups/pods, horseshoe, circle. Keep students apart or together, exam spacing with an empty desk between students, pin stu… - [Exam Clock](https://lans.cloud/exam-clock): Free exam clock for the classroom display: a large live clock with each exam’s start and finish times, live time remaining per paper, and one-click +10/25/50% extra-time rows. Ad-free fullscreen. - [Reading Fluency Timer](https://lans.cloud/reading-fluency-timer): Free reading fluency timer: run the standard 1-minute probe or time a whole passage, tap the last word read to stop and score, and get WCPM placed in the national Hasbrouck–Tindal percentile bands by… - [Reading Level Converter](https://lans.cloud/reading-level-converter): Free Lexile to guided reading level converter: enter a Lexile, F&P letter, DRA level, AR/ATOS level, or grade and see the matching band in every other system — plus a printable K–8 conversion chart. … - [Addition Timed Test](https://lans.cloud/addition-timed-test): Free addition timed test online with a subtraction mode: pick fact families 1–12, race the clock or the 1-minute sprint, get instant grading and a drill round built from your missed fact families. No… - [Multiplication Timed Test](https://lans.cloud/multiplication-timed-test): Free multiplication timed test online — with division, addition and subtraction modes too. Pick your fact families (1–12), choose practice, timed test, or 1-minute sprint: instant grading and a misse… - [Spelling Test Practice](https://lans.cloud/spelling-test-practice): Free spelling test practice with your own word list: the browser reads each word aloud, the student types it, and gets instant feedback or an end-of-test score. No account, nothing uploaded. - [Locker Combination Practice](https://lans.cloud/locker-combination-practice): Practice your locker combination online on a virtual Master-style dial: guided steps that explain every mistake, a no-hints test mode, and a timed challenge. Your combo is saved only on your device —… - [Classroom Traffic Light](https://lans.cloud/classroom-traffic-light): Free online classroom traffic light: a big red, yellow, green behavior signal for your projector or smartboard. Tap or use R/Y/G shortcuts, customize what each light means, and present fullscreen ad-… - [Classroom Voice Level Chart](https://lans.cloud/classroom-voice-level-chart): Free interactive voice level chart for your classroom display: levels 0–4 from silence to outside voice, tap or press a number key and the level lights up huge — editable names, printable wall poster… - [Classroom Noise Meter](https://lans.cloud/classroom-noise-meter): Free classroom noise meter and volume monitor: a live traffic light powered by your microphone with adjustable green/red thresholds, an optional too-loud buzz, and an ad-free fullscreen mode. Nothing… - [Classroom Scoreboard](https://lans.cloud/classroom-scoreboard): Free interactive scoreboard for classroom games: up to 12 color-coded teams, +1/+5/+10 point buttons, live rankings with ties, undo, weekly running totals, saved rosters, and an ad-free fullscreen pr… - [Test Grade Calculator](https://lans.cloud/test-grade-calculator): Free test grade calculator for teachers: percentage and letter grade from wrong answers or a typed score (34.75/40 works), a full printable grading chart, and curve modes (+points or best-paper-equal… - [Random Number Generator](https://lans.cloud/random-number-generator): Free random number generator. Draw one or many numbers between any minimum and maximum, with no-repeat and sorted options. Instant and fair. - [Dice Roller](https://lans.cloud/dice-roller): Free online dice roller. Roll a d6, d20, d100 or any custom die, up to 100 dice at once, with totals, individual results, and roll history. - [Random Name Picker](https://lans.cloud/random-name-picker): Free random name picker wheel for classrooms and events. Spin to choose a name fairly, auto-remove picked names, and present it ad-free in fullscreen. - [Spin the Wheel / Decision Wheel](https://lans.cloud/spin-the-wheel): A free, customizable spin the wheel tool with saved wheels (name your class list once, load it every morning), ready-made presets, and a clean ad-free fullscreen presentation mode for classrooms and … - [Random Team Picker](https://lans.cloud/random-team-picker): Free random team picker. Split a list of names into balanced teams instantly. Includes ad-free presentation mode for classrooms and events. - [Classroom Timer](https://lans.cloud/classroom-timer): Free fullscreen classroom timer with a giant countdown, color-shifting progress ring, and optional chime. Ad-free presentation mode for projectors. - [Coin Flip](https://lans.cloud/coin-flip): A genuinely fair coin flip for classroom picks and honest decisions: true 50/50 heads or tails with a 3D animation, running stats and streaks, and an ad-free fullscreen mode. (The trick version lives… - [Yes or No Wheel](https://lans.cloud/yes-no-wheel): Spin the yes or no wheel for an instant, unbiased answer to any question. Optional Maybe mode, session tally, and ad-free fullscreen view. - [Would You Rather Questions for Kids](https://lans.cloud/would-you-rather-questions-for-kids): Free would you rather questions for kids: 160 hand-picked, kid-safe pairs in 10 themed categories, a one-click printable, and a fullscreen classroom game — no sign-up. - [Reading Log Generator](https://lans.cloud/reading-log-generator): Free reading log generator: pick weekly, monthly, or summer layout, toggle the columns you track — title, author, minutes, pages, rating, parent signature — and print a clean sheet. No sign-up. ## Browser Games Hub: [Browser Games](https://lans.cloud/browser-games) - [Whack-a-Mole Review Game](https://lans.cloud/whack-a-mole-review-game): Free whack-a-mole review game for the classroom: paste your own questions, moles pop up holding answers, kids whack the right one. No PowerPoint, no download, no sign-up. - [Plinko Review Game](https://lans.cloud/plinko-review-game): Free plinko review game for the classroom: answer a question right, drop a chip down the pegs, bank the slot it lands in. Or run rewards mode with your own prize labels. No PowerPoint, no download. - [Four in a Row Review Game](https://lans.cloud/four-in-a-row-review-game): Free four in a row review game for the classroom: two teams answer your questions to earn disc drops — first to connect four wins. No PowerPoint, no download, no sign-up. - [Nim Game (2 Player)](https://lans.cloud/nim-game-2-player): Play Nim online free — the classic 2-player matchstick game, or take on an unbeatable computer. Learn the nim-sum trick to always win the 21 game. - [Hex Board Game](https://lans.cloud/hex-game-2-player): Play Hex free online, 2 players on one screen. Red connects top to bottom, Blue left to right, on a 7, 9, or 11 board — with the pie rule for a fair game. No sign-up. - [Sprouts Game](https://lans.cloud/sprouts-game): Play the sprouts game online — Conway’s pencil-and-paper classic for 2 players on one screen. Draw real curves, the rules check themselves. Free, no sign-up. - [Emoji Guessing Game Maker](https://lans.cloud/emoji-guessing-game-maker): Free emoji guessing game maker: build your own emoji quiz, play it on the spot, and share it with a link that carries the puzzles — nothing uploaded. Themed packs included. ## Gaming Hub: [Gaming Tools](https://lans.cloud/gaming-tools) - [Stardew Keg vs Dehydrator Calculator](https://lans.cloud/stardew-keg-vs-dehydrator): Stardew Valley keg vs dehydrator calculator: compare raw, preserves jar, keg, and dehydrator profits for any crop — with Artisan perk, processing times, and profit per day per machine. - [D&D Travel Time Calculator](https://lans.cloud/dnd-travel-time-calculator): Free D&D 5e travel time calculator: distance in miles or hexes, fast/normal/slow pace, terrain and mounts, with forced-march exhaustion DCs — overland travel solved in one screen. - [D&D Stat Roller](https://lans.cloud/dnd-stat-roller): Free D&D 5e ability score roller: 4d6 drop lowest with every die shown, 3d6 classic, 2d6+6 heroic, the 27-point point buy calculator, and standard array assignment — all with live modifiers. - [D&D Encounter Difficulty Calculator](https://lans.cloud/dnd-encounter-difficulty-calculator): Free D&D encounter difficulty calculator for BOTH rule sets: 2014 DMG (XP thresholds × multiplier, easy to deadly) and 2024 DMG (Low/Moderate/High XP budgets, no multiplier) — every step of the math … - [Pokémon Weakness Calculator](https://lans.cloud/pokemon-weakness-calculator): Free Pokémon dual type weakness calculator: pick one or two defending types and instantly see every 4×, 2×, ½×, ¼× and immune matchup — plus a full team weakness calculator with STAB coverage gaps. C… - [Minecraft Pixel Art Generator](https://lans.cloud/minecraft-pixel-art-generator): Free Minecraft pixel art generator: turn any image into a block-by-block build plan, with a wool/concrete/terracotta palette picker, a shopping list in stacks of 64, a printable build guide, and .sch… - [Minecraft Circle Generator](https://lans.cloud/minecraft-circle-generator): Free Minecraft circle generator. Block-by-block pixel circle charts for any diameter up to 128, ovals included, with block counts in stacks of 64, a copyable row-by-row build list, and PNG download. - [Nether Portal Calculator](https://lans.cloud/nether-portal-calculator): Free Minecraft nether portal calculator: convert Overworld coordinates to Nether coordinates and back with the exact ÷8 floor rule the game uses, so portals link perfectly. - [Minecraft Villager Trading Chart](https://lans.cloud/minecraft-villager-trading-chart): Free interactive Minecraft villager trading chart: every trade for all 13 professions and 5 levels, with workstations, offer chances, enchanted-book prices, best emerald farms, and a reverse lookup f… - [Minecraft Potion Chart](https://lans.cloud/minecraft-potion-chart): Interactive Minecraft potion chart: pick a potion for its full brewing step chain, look up any ingredient in reverse, and read every base, extended (Redstone) and level-II (Glowstone) duration — incl… ## Dragon Ball Hub: [Dragon Ball Tools](https://lans.cloud/dragon-ball-tools) - [Dragon Ball Z Power Level Calculator](https://lans.cloud/dragon-ball-z-power-level-calculator): Enter your character's name, race, transformation, and base power. The calculator applies multipliers to reveal your power level instantly. - [Power Level Comparator](https://lans.cloud/dragon-ball-z-power-level-comparator): Compare two Dragon Ball Z fighters side-by-side. Enter their names, races, and forms to calculate who would win in a fight based on canonical power multipliers. - [Saiyan Name Generator](https://lans.cloud/saiyan-name-generator): Free Saiyan name generator using authentic vegetable puns (Kakarot, Vegeta, Broly style), plus Namekian, Frieza race, and Majin names — and a browsable list of every vegetable-derived name it makes. - [Dragon Ball Fusion Name Generator](https://lans.cloud/dragon-ball-fusion-name-generator): Fuse any two names the Dragon Ball way: get Fusion Dance and Potara-style combined names ranked like Gogeta, Vegito, and Gotenks — free and instant. ## Anime & Fandom Hub: [Anime Generators](https://lans.cloud/anime-generators) - [JoJo Stand Generator](https://lans.cloud/jojo-stand-generator): Free JoJo Stand generator and stand stats maker: awaken a Stand from your name or set all six grades yourself — stat wheel E to A, unique ability and limitation — then download it as a shareable Stan… - [One Piece Bounty Calculator](https://lans.cloud/one-piece-bounty-calculator): Free One Piece bounty calculator: build a pirate from combat tier, Devil Fruit, Haki, crew role and feats to estimate their berry bounty on a wanted poster — generated face or your own photo as mugsh… - [One Piece Haki Generator](https://lans.cloud/one-piece-haki-generator): Free One Piece Haki type generator: awaken your Haki from your name — Observation, Armament, or the rare Conqueror's — with a mastery score, advanced-form unlocks, and the canon user you match, on a … - [Solo Leveling Hunter Rank Generator](https://lans.cloud/solo-leveling-hunter-rank-generator): Free Solo Leveling hunter rank generator: find your hunter rank (E to S, National-Level, Monarch) and job class from your name, with a stat block, your own shadow army, and the canon hunter you match… - [Demon Slayer Breathing Style Generator](https://lans.cloud/demon-slayer-breathing-style-generator): Free Demon Slayer breathing style generator: find which of the 14 canon breathing styles is yours from your name — signature form, lineage back to Sun Breathing, Hashira tier, and the canon user you … - [Avatar Bending Generator](https://lans.cloud/avatar-bending-generator): Free Avatar: The Last Airbender bending generator: find what bending you'd have from your name — Water, Earth, Fire, Air, or the rare Avatar — plus a prestige sub-skill like lightning or bloodbending… - [Jujutsu Kaisen Cursed Technique Generator](https://lans.cloud/jujutsu-kaisen-cursed-technique-generator): Free Jujutsu Kaisen cursed technique generator: manifest your own cursed technique from your name — sorcerer grade (Grade 4 to the rare Special Grade), extension moves, a binding-vow drawback, and a … - [One Punch Man Hero Rank Generator](https://lans.cloud/one-punch-man-hero-rank-generator): Free One Punch Man hero rank generator: get your Hero Association class (C to S), numbered rank, a deadpan OPM hero name, the highest disaster level you could handle, and the canon hero whose seat yo… - [Bleach Zanpakuto Generator](https://lans.cloud/bleach-zanpakuto-generator): Free Bleach zanpakuto generator: forge your blade from your name — a Japanese zanpakuto name with its English meaning, a shikai release command, a rare bankai, and your Gotei 13 division and seat. In… - [Naruto Chakra Nature Generator](https://lans.cloud/naruto-chakra-nature-generator): Free Naruto chakra nature generator: find your chakra nature from your name — Fire, Wind, Lightning, Earth, or Water — plus a rare kekkei genkai like Ice or Wood Release, your signature jutsu, villag… - [Blue Lock Player Generator](https://lans.cloud/blue-lock-player-generator): Free Blue Lock player generator: find your striker from your name — your signature "weapon", position, canon team and Blue Lock rank, plus the canon character your game resembles and a rare Flow awak… - [Nen Type Generator](https://lans.cloud/nen-type-generator): Free Hunter x Hunter Nen type generator: take the water divination test with your name — or the honest personality quiz — to find your Nen type, from Enhancer to the rare Specialist, with your hatsu … - [Black Clover Grimoire Generator](https://lans.cloud/black-clover-grimoire-generator): Free Black Clover grimoire generator: find your magic attribute from your name — fire, water, wind, earth, or a rare one like light or dark — your clover rarity up to the 5-leaf black clover, a signa… ## Developer & Text Hub: [Developer & Text Tools](https://lans.cloud/dev-tools) - [Text Anonymizer](https://lans.cloud/text-anonymizer): Free text anonymizer: remove names, emails, phone numbers, API keys and other personal data before pasting text into ChatGPT or anywhere else — 100% in your browser, reversible with numbered tags. - [Case Converter](https://lans.cloud/case-converter): Free text case converter: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and more — instantly in your browser. - [UUID Generator](https://lans.cloud/uuid-generator): Free UUID v4 generator. Create one or up to 500 random UUIDs with uppercase and no-hyphen options, generated locally with cryptographic randomness. - [Roman Numeral Converter](https://lans.cloud/roman-numeral-converter): Free Roman numeral converter. Convert numbers to Roman numerals and back, live in both directions — up to 3,999,999 with vinculum (overline) notation — with strict validation. - [Word & Character Counter](https://lans.cloud/word-counter): Free word counter and character counter. Live counts for words, characters, sentences, paragraphs, reading and speaking time — plus a keyword density panel showing your most-used words. - [Password Generator](https://lans.cloud/password-generator): Free secure password generator. Create strong random passwords with custom length and character sets, generated locally with cryptographic randomness. - [Pomodoro Timer with Rain Sounds](https://lans.cloud/pomodoro-timer-with-rain-sounds): Free pomodoro timer with rain and brown noise generated live in your browser — no audio files, no loop seams. Classic 25/5 and deep-work presets, chimes, daily counter, ad-free fullscreen. - [JSON Formatter & Validator](https://lans.cloud/json-formatter): Free online JSON formatter and validator. Beautify, minify, and validate JSON instantly with exact error locations — private, in your browser. ## Craft Hub: [Crochet Calculators](https://lans.cloud/crochet-calculators) - [Bookbinding Signature Calculator](https://lans.cloud/bookbinding-signature-calculator): Free bookbinding signature calculator: turn a page count into signatures, blank filler pages, per-sheet folding order, and a printable imposition cheat sheet — for fanbinding and DIY books. - [Granny Square Pattern Generator](https://lans.cloud/granny-square-pattern-generator): Free granny square color pattern generator. Shuffle round-by-round color combinations from curated yarn palettes, preview a whole blanket, download the chart. - [Granny Square Blanket Calculator](https://lans.cloud/granny-square-blanket-calculator): Free calculator for how many granny squares you need for any blanket size — baby to king — by your square size, with the grid layout, finished dimensions, a worsted yarn estimate, and a yarn budget f… - [Crochet Yarn Calculator](https://lans.cloud/crochet-yarn-calculator): Free crochet yarn calculator: how many yards and skeins you need for any blanket or scarf, by project size, stitch (single crochet to granny), and yarn weight (sock to super bulky). - [Yarn Substitution Calculator](https://lans.cloud/yarn-substitution-calculator): Free yarn substitution calculator: verify any substitute yarn — by weight class, gauge, or wraps per inch — with a traffic-light verdict, hook and needle sizes, and the exact yards and skeins to buy. ## Family Hub: [Family Tools](https://lans.cloud/family-tools) - [Sibling Name Matcher](https://lans.cloud/sibling-name-matcher): Free sibling name matcher: enter your kids’ names and get style-matched suggestions (shared origin, matching era, compatible sound) with the reasoning shown for every match. Runs in your browser. - [Chore Chart Generator](https://lans.cloud/chore-chart-generator): Free chore chart generator with automatic weekly rotation: enter the kids and the chores, print a themed chart for the fridge plus the schedule that proves whose turn it is. No accounts, nothing leav… - [Baby Name Elimination Game](https://lans.cloud/baby-name-elimination-game): Free baby name elimination game for couples: keep-or-cut through a pool of names, then head-to-head rounds until one name wins. Then send your partner a challenge link with the same list and compare … - [Pass the Parcel Timer](https://lans.cloud/pass-the-parcel-timer): Free pass the parcel music that stops at random: a built-in party tune, your own song (played locally, never uploaded), or a silent buzzer. Runs hot potato and musical statues too: no app, ad-free wh… - [Minute to Win It Timer](https://lans.cloud/minute-to-win-it-timer): Free minute to win it timer: a game-show-sized 60-second countdown with warning ticks, a proper buzzer, and per-player win tracking. Round lengths from 30s blitz to 120s team challenges. No app neede… - [Secret Santa Generator](https://lans.cloud/secret-santa-generator): Free secret santa generator with no emails and no accounts: draw names with couple exclusions, then share private per-person reveal links over WhatsApp or any chat. Names never touch a server. - [Homeschool Schedule Generator](https://lans.cloud/homeschool-schedule-generator): Free homeschool schedule generator: enter the kids and subjects, pick a classic timetable or a loop schedule, and print a color-coded weekly plan plus per-kid daily strips. No sign-up, nothing leaves… - [Baby Shower Name Game Generator](https://lans.cloud/baby-shower-name-game-generator): Free guess the baby name game generator: print personalized baby shower sheets (name unscramble, guess-from-hints, initials trivia, or a ballot), each with a hidden answer key. No sign-up, nothing up… - [Room Layout Planner](https://lans.cloud/room-layout-planner): Free room layout planner: draw your room to scale, place furniture with real measurements, then drag, rotate and snap pieces to test layouts, with overlap warnings, a measure tool, and PNG export. No… ## Fitness Hub: [Fitness Tools](https://lans.cloud/fitness-tools) - [Tabata Timer](https://lans.cloud/tabata-timer): Free tabata timer with the classic 20/10 × 8 protocol, EMOM and AMRAP presets with a tap round-counter, custom work/rest intervals, phase beeps, and an ad-free fullscreen mode for gyms and classes. - [Warmup Sets Calculator](https://lans.cloud/warmup-sets-calculator): Free warmup sets calculator with plate loading: enter your work weight and get every warmup set with the exact plates per side — lb or kg, your bar, and only the plates your gym stocks. - [Equal Playing Time Calculator](https://lans.cloud/equal-playing-time-calculator): Free equal playing time calculator for youth sports: enter players present, players on the field, and game length — get a substitution rotation where everyone plays exactly the same minutes. - [Random Bodyweight Workout Generator](https://lans.cloud/random-workout-generator): Generate a random bodyweight workout by difficulty, focus area, and duration. No equipment required. - [Team Snack Schedule Generator](https://lans.cloud/team-snack-schedule-generator): Free team snack schedule generator: paste your family list, add the game dates, and get a fair snack rotation — every family takes a turn before anyone repeats — with a printable sheet and a copy-pas… ## Pranks & Jokes Hub: [Prank & Gag Tools](https://lans.cloud/prank-tools) - [Mind Reading Prank](https://lans.cloud/mind-reader-prank): Free mind reading prank website: the oracle answers any question your friends ask — because you secretly typed the answer while they watched you type the magic words. The classic Peter Answers trick,… - [Jumpscare Prank Link](https://lans.cloud/jumpscare-prank): Free jumpscare link to send to friends: pick an innocent-looking page — stare at the dot, an optical illusion, a riddle — set how loud the scare is, and it jumps out seconds later. Ends with a friend… - [Rigged Coin Flip](https://lans.cloud/rigged-coin-flip): Free rigged coin flip: a coin that always lands on heads — or tails — because where you tap the flip button secretly decides the result. Looks completely fair to everyone watching. Win every toss, th… - [Crystal Ball Mind Reader](https://lans.cloud/crystal-ball-mind-reader): The classic crystal ball mind reading trick online: think of a two-digit number, do the digit math, find your symbol in the chart — the ball reveals it every time. The old Flash Mind Reader, rebuilt … - [Rigged Love Calculator](https://lans.cloud/rigged-love-calculator): Free rigged love calculator prank: secretly arm the result before your friend types the names — ~8% disaster to ~96% soulmates, you decide. Honest name-hash otherwise, and names never leave the brows… - [The Impossible Button](https://lans.cloud/impossible-button): The button you can’t click: it dodges your cursor, taunts you after every escape, and finally surrenders into a friendly reveal. Play it yourself or send the disguised “claim your prize” prank link t… - [Rigged Dice Roller](https://lans.cloud/rigged-dice-roller): Free rigged dice roller — loaded dice online: where you tap the roll button secretly decides the result, so the die always rolls 6 (or 1) while everyone sees a fair tumble. Keyboard presets pick exac… - [Fake Lie Detector](https://lans.cloud/fake-lie-detector): Free fake lie detector prank that runs in the browser — no app to install. Friends press a thumb on the scanner and get TRUTH or LIE — verdicts you secretly queued up before handing over the phone. - [Rigged Rock Paper Scissors](https://lans.cloud/rigged-rock-paper-scissors): Free rigged rock paper scissors: your friend plays the computer, but you secretly decide who wins every round — it counters their every throw, always loses, or plays fair. Identical on screen either … - [Ghost Detector Prank](https://lans.cloud/ghost-detector-prank): Free ghost detector prank that runs in the browser — no app to install, no camera. A radar sweep and EMF needle idle innocently until you secretly arm a detection: readings spike, a blip crosses the … ## Pool Care Hub: [Pool Calculators](https://lans.cloud/pool-calculators) - [Pool Volume Calculator](https://lans.cloud/pool-volume-calculator): Pool volume calculator for rectangle, round, oval and kidney pools: enter the dimensions in feet or meters and get the volume in US gallons and litres, plus surface area and average depth. - [Pool Chemical Calculator](https://lans.cloud/pool-chemical-calculator): Pool chemical calculator for chlorine, pH, alkalinity and stabilizer: enter your test readings and pool volume to get the dose of each product in ounces and grams, with shock folded in. - [Pool Salt Calculator](https://lans.cloud/pool-salt-calculator): Pool salt calculator for saltwater pools: enter your volume and current salt reading to get the pounds and kilograms of salt to add, rounded up to whole 40 lb or 25 kg bags. - [Cyanuric Acid Calculator](https://lans.cloud/cyanuric-acid-calculator): Cyanuric acid calculator for pool stabilizer: work out how much CYA to add to hit your target, or how much water to replace when the level is too high, with the chlorine targets it sets. ## Guides Long-form pages that work out an answer and link the tools that compute it. - [Best Villager Trades in Minecraft (26.2), Ranked by the Numbers](https://lans.cloud/best-villager-trades): Every Minecraft villager trade ranked by emeralds per item, computed from the pinned Java 26.2 trade table, including the rates that only look good. - [Mending Villager Cost: The Real Emerald Price of a Mending Book](https://lans.cloud/mending-villager-cost): A Mending book costs 10 to 38 emeralds from a librarian at any level. Where that range comes from, what moves it, and how a zombie cure cuts it. - [Grading Scale Charts for 10 to 100 Question Tests](https://lans.cloud/grading-scale-charts): Grading scale charts for 10, 15, 20, 25, 30, 35, 40, 50, 60 and 100 question tests: how many wrong each letter grade allows, computed row by row. - [How to Substitute Yarn in a Pattern: The Math, Worked Out](https://lans.cloud/yarn-substitution-guide): Swapping yarn in a pattern, worked step by step: weight class, then gauge, then yardage. Four real substitutions computed by our own calculator. - [15 Classroom Timer Activities That Work on a Projector](https://lans.cloud/classroom-timer-activities): Fifteen timer activities for the projector: pack-up countdowns, station carousels, quiet streaks and one-minute probes, each with the free tool that runs it. - [Which Robot Pool Cleaner Fits Your Pool? A Sizing Guide](https://lans.cloud/robot-pool-cleaner-guide): Do you need a pool vacuum robot, or a hose? The four cleaner classes compared, with the cable length and run time your own dimensions actually demand.