Free Apps and ToolsNo Catch, No Subscription
New additions for files, fonts, code, audio, and data. Explore 394 new tools
Browse calculators by topic Finance, everyday life, construction, conversions, and more.
3600 apps · Showing 3361–3456
Learning & Reference
313 appsLearning & Reference: Sound Science
Learning & Reference: Space & Astronomy
Learning & Reference: Space & Planets
Simulation · GenerateAlien Year Age CalculatorType your Earth age and count how many trips you would make around another star.Simulation · GenerateExoplanet Discovery Timeline for KidsTravel from a 1992 discovery to newer worlds found by watching stars and shadows.Simulation · GenerateExoplanet Distance Race for KidsRace two faraway worlds and see how many years even light would need to reach them.Simulation · GenerateExoplanet Explorer for KidsExplore 12 real faraway worlds and compare their stars, years, sizes, and distances.Simulation · GenerateExoplanet Size Comparer for KidsPut two exoplanets side by side and see how their sizes compare with Earth.Simulation · GenerateExoplanet Temperature Explorer for KidsCompare estimated temperatures on rocky worlds and giant planets far from Earth.Simulation · GenerateSpace Fact Flipbook for KidsExplore six clear pages about planets, the Moon, or stars.
Learning & Reference: Spelling Practice
Printable · GenerateHyperlegible Spelling Sheet MakerGive up to ten spelling words distinct shapes and wide writing lines.Printable · GenerateOpenDyslexic Spelling Sheet MakerMake a printable ten-word spelling page in OpenDyslexic with wide writing lines.Text · CheckSpelling Word Magic RevealerScramble one spelling word, say it aloud, then watch every correct letter return.
Learning & Reference: Sun Position
Coordinates · CalculateObserver Height Sunrise CalculatorCompare sea-level sunrise and sunset with an observer standing above the horizon.Coordinates · CalculateShadow Length CalculatorUse the sun angle and an object's height to estimate its level-ground shadow length.Coordinates · CalculateSolar Noon CalculatorFind local solar noon, the day's highest sun angle, and the darkest night point.Coordinates · CalculateSolar Panel Sun Angle HelperFind the panel tilt and compass direction that faces the sun at one exact time.Coordinates · CalculateSun Position CalculatorCalculate the sun's altitude, compass direction, and horizon status for a place and time.Coordinates · CalculateSunrise Direction CalculatorCalculate the sunrise compass bearing, time, and plain direction for any place and day.Coordinates · CalculateSunset Direction CalculatorCalculate the sunset compass bearing, time, and plain direction for any place and day.
Learning & Reference: Systems Thinking
Simulation · GenerateBalancing Feedback Loop ExplorerWatch a fan push back against heat and help a room move toward balance.Simulation · GenerateCause-and-Effect Loop Maker for KidsName four connected ideas and watch a change travel all the way around.Simulation · GenerateEcosystem Loop Maker for KidsFollow rain, plants, animals, and soil around a simple meadow system.Simulation · GenerateHabit Loop Mapper for KidsMap how a cue, action, reward, and repeat can turn into a habit.Simulation · GeneratePositive Feedback Loop ExplorerSee how practice, skill, confidence, and motivation can help one another grow.
Learning & Reference: Tracing & Fine Motor
Printable · GenerateAlphabet Tracing Board for KidsChoose A, B, or C, start at the green dot, and follow a clear dotted letter with a steady brush.Number · CheckNumber Tracing Board for KidsFollow a large dotted 1, 2, or 3, then draw the same number of stars, dots, or hearts.Printable · GeneratePre-Writing Lines Board for KidsMove from Start to Finish along three large dotted paths and practice steady hand movements at your pace.Number · CheckShape Tracing Board for KidsTrace a circle, triangle, or square, then draw the shape again and turn it into a character.
Learning & Reference: U.S. Geography
Quiz · CheckState Map Flashcards for KidsTurn over a state shape card to check its name, capital, and region.Quiz · CheckU.S. Regions Coloring Map for KidsColor the Northeast, Midwest, South, and West, then print the map.Quiz · CheckU.S. State Map Explorer for KidsPick a state, see it light up, and learn its capital and region.
Learning & Reference: Visual Learning
Learning & Reference: Visual Novels
Text · GenerateBook Report Visual Novel Maker for KidsTurn a setting, problem, choice, and lesson into a playable report.Text · GenerateClassroom Visual Novel Maker for KidsTurn a small classroom problem into a calm practice story.Text · GenerateFeelings Visual Novel Maker for KidsShow a feeling, choose a helpful action, and write what changes.Text · GenerateFriendship Visual Novel Practice for KidsTry a kind question, a clear answer, and a helpful next step.Text · GenerateHistory Role-Play Visual Novel for KidsWrite a past problem and compare what different choices can do.Text · GenerateVocabulary Visual Novel Maker for KidsUse clues, dialogue, and examples to make a new word easy to learn.
Learning & Reference: Vocabulary Supports
Learning & Reference: Vocabulary Tools
Games & Play
199 appsGames & Play: Printable Puzzles
Printable · GenerateEasy Maze GeneratorMake a small maze with roomy paths for kids who are just getting started.Printable · GenerateEasy Sudoku for KidsTry an easy number puzzle and check your work one square at a time.Printable · GenerateHard Maze GeneratorBuild a bigger maze with many turns for kids who want a real challenge.Printable · GenerateMaze Answer Key MakerMake a maze with a clear answer path for parents, teachers, and puzzle helpers.Printable · GenerateMedium Sudoku PuzzleSolve a medium Sudoku when you are ready for fewer clues and more thinking.Printable · GeneratePrintable Maze MakerMake a one-of-a-kind maze, then print it or save it as an SVG picture.Printable · GeneratePrintable Sudoku with AnswersPrint a Sudoku puzzle and reveal its full answer when it is time to check.
Games & Play: Puzzles & Cubes
Cube moves · CheckCube Algorithm CheckerCheck cube move notation and see a clean version before you practice it.Cube moves · CheckCube Algorithm InverterFlip a cube algorithm so every move runs backward in the right order.Cube moves · CheckCube Move CounterCount the turns in a cube algorithm, including groups, repeats, and commutators.Cube moves · GenerateRubik's Cube Scramble GeneratorMake a fresh practice scramble for a 2×2, 3×3, 4×4, Pyraminx, Skewb, or Megaminx puzzle.
Games & Play: Word Games
Emoji · GenerateEmoji Riddle MakerMake a small emoji clue and challenge someone to guess the hidden word.Word data · CheckExample Sentence Word Game for KidsRead a real example sentence and choose the word that belongs with it.Word data · CheckFriendly Definition Match Game for KidsRead a word and choose the human-edited definition that matches it.Text · GeneratePretend Excuse MachineMake a clearly pretend, extra-silly excuse for a story, skit, or joke.Printable · GenerateSpelling Word Search MakerMake a friendly word search that hides spelling words forward and sideways.Printable · GenerateThemed Word Search GeneratorPick animals, space, school, or nature and get a ready-to-play word search.Word data · CheckWord Definition Quiz for KidsPick the meaning that matches a familiar word and get a quick answer.Word data · CheckWord Relationship Quiz for KidsChoose the word that is a kind, part, whole, group, or opposite.Printable · GenerateWord Search Answer Key MakerCreate a word search and highlight every hidden word when you need the answers.Printable · GenerateWord Search MakerTurn your own word list into a neat letter puzzle you can print and solve.
Games & Play: Creative Play
Games & Play: Music & Sound
Audio · GenerateCoin Sound Effect MakerCreate a cheerful coin or treasure pickup sound for a pretend game win.Audio · GenerateJump Sound Effect MakerMake a bouncy jump sound that fits a tiny hero, frog, or space creature.Audio · GenerateLaser Sound Effect MakerMake a fresh pew, zap, or space laser sound each time you press the button.Audio · GenerateMusical Typing KeyboardTurn the letter keys on your computer into notes on a little piano.Audio · GenerateOnline Piano for KidsPlay a bright two-octave piano with your mouse, finger, or computer keys.Audio · GenerateRetro Game Sound MakerMake coins, lasers, jumps, blips, and booms that sound like an old video game.
Games & Play: Physics Play
Simulation · GenerateBouncy Shape SandboxChoose circles or boxes, turn up the bounce, and fill a playful physics box.Simulation · GenerateReverse Gravity PlaygroundFlip gravity up or down and discover what happens to a box full of shapes.Simulation · GenerateStack and Smash Physics LabBuild a block tower, then drop a heavy ball and watch every bump and tumble.
Games & Play: Randomizers & Pickers
Coin · GenerateCoin FlipFlip one coin or a whole batch, see heads and tails totals, and track every round without signup.Dice · GenerateDice RollerRoll up to 20 dice with 4, 6, 8, 10, 12, 20, or 100 sides, then add a bonus and keep the history.Picker · GenerateRaffle PickerDraw one or many winners from a pasted entry list, handle extra tickets, and keep an auditable result log.Picker · GenerateRandom Name PickerPick one or several names fairly, keep a clear draw history, and avoid picking the same person twice.Picker · GenerateRandom Number GeneratorGenerate one or many numbers in any range, with unique results, decimals, sorting, and easy copying.Wheel · GenerateSpin WheelMake a colorful wheel, spin it, remove winners if you want, and share the exact setup with your group.Wheel · GenerateYes or No WheelSpin a simple yes or no wheel, change the two answers, or adjust the odds for games and group decisions.
Games & Play: Groups & Teams
Games & Play: Gift Exchanges
Games & Play: 3D Physics Games
Simulation · Generate3D Block Tower Builder for KidsMove the guide, drop eight chunky blocks, and see how high your steady 3D tower can grow.Simulation · Generate3D Bowling Alley Game for KidsChoose a starting spot, roll the blue ball, and knock down ten soft pins in a friendly 3D lane.Simulation · Generate3D Domino Chain Reaction for KidsTip the first domino and watch one small push travel through a row of twelve 3D blocks.Simulation · Generate3D Marble Ramp Race for KidsRelease bright marbles one at a time and watch real 3D gravity carry them down a long ramp.Simulation · Generate3D Peg Drop Game for KidsPick a starting spot and watch six balls bounce through a 3D field of round pegs.Simulation · Generate3D Seesaw Balance Game for KidsChoose a side, place soft weights, and keep a hinged 3D seesaw close to level for five stars.Simulation · GenerateComet Target Physics Game for KidsChange the launch angle and guide five tiny comets along curved paths into a glowing target.Simulation · GenerateMoon Bounce Physics Lab for KidsBoost a golden moon ball and count eight slow bounces while gentle gravity pulls it back down.Simulation · GenerateWiggly Bridge Physics Test for KidsSend five round parcels across a wiggly bridge and watch each linked plank pull on the next.Simulation · GenerateZero-Gravity Space Gates for KidsLaunch a small pod and steer through three glowing gates in a calm lane with no gravity.