My World Tools

Utility

Unit Converter

Convert between length, mass, temperature, volume, area, and speed units instantly.

Utility

QR Code Generator

Turn any link or text into a scannable QR code — generated entirely on your device.

Utility

Password Generator

Generate a strong, random password with the character types and length you choose.

Lifestyle

Pomodoro Timer

Work in focused sprints with short breaks, using the classic Pomodoro technique.

Utility

Color Palette Generator

Generate a matching 5-color palette from any base color, or roll a random one.

Utility

World Clock

See the current time in cities around the world, side by side.

Utility

Image Resizer & Converter

Resize, compress, and convert images between JPG, PNG, and WebP — entirely on your device.

Utility

Regex Tester

Test regular expressions against sample text with live highlighting of every match.

Utility

Proofreader

Paste your text to catch double spaces, repeated words, and other easy-to-miss mechanical slips.

Utility

Markdown Editor

Write Markdown on the left, see the formatted preview update live on the right.

Utility

JSON Formatter

Format, validate, and minify JSON data — spot syntax errors instantly.

Science

Function Grapher

Plot any mathematical function of x and explore its shape by adjusting the range.

Science

Statistics Calculator

Enter a list of numbers to instantly get mean, median, mode, variance, and standard deviation.

Science

Projectile Motion Simulator

Simulate projectile motion under gravity — adjust speed, angle, and gravity to see the trajectory change.

Science

Molar Mass Calculator

Enter a chemical formula like Ca(OH)2 to compute its molar mass and element breakdown.

Science

Loan & Savings Calculator

Estimate monthly loan payments or project savings growth with compound interest.

Science

BMI Calculator

Calculate your Body Mass Index from weight and height, with an instant category readout.

Science

Moon Phase Calendar

See the moon's phase and illumination for any date, calculated on the spot.

Science

Trend Predictor

Enter a series of numbers and project the next values based on the linear trend.

Science

Scientific Unit Converter

Convert between pressure, energy, power, data storage, and frequency units.

Science

Fractal Viewer

Explore the Mandelbrot and Julia sets — click anywhere to zoom into the pattern.

Learning

Flashcards

Flip through flashcards to test your recall — shuffle for a fresh order anytime.

Learning

Typing Practice

Type the sentence shown to measure your speed (WPM) and accuracy.

Learning

Phrase Comparison

See how a common phrase is said in all 10 supported languages, side by side.

Learning

Quote of the Day

A new inspiring quote every day, with more to discover whenever you like.

Learning

History Timeline

Scroll through major world events from ancient history to the modern era.

Learning

Quiz Portal

Test your general knowledge with a short multiple-choice quiz and see your score.

Learning

Algorithm Glossary

Look up common programming and algorithm terms with plain-language explanations.

Learning

Reading Tracker

Keep a simple list of books you want to read, are reading, or have finished.

Learning

Grammar Checker

Catch common English grammar slips like a/an mix-ups and double negatives.

Learning

Logic Puzzles

Solve short riddles and brain teasers, one at a time.

Lifestyle

Meal Suggester

Check off ingredients you have on hand and get recipe suggestions.

Lifestyle

To-Do List

A simple, no-frills task list that stays on your device.

Lifestyle

Habit Tracker

Track daily habits on a 7-day grid and watch your streak grow.

Lifestyle

Mind Map

Sketch out ideas as a draggable node map branching from a central topic.

Lifestyle

Travel Planner

Check off your packing list and track your trip budget in one place.

Lifestyle

Breathing Guide

Follow a visual breathing rhythm — box breathing, 4-7-8, and more.

Lifestyle

Random Decider

Can't decide? Enter your options or flip a coin to let chance choose.

Lifestyle

Budget Tracker

Log income and expenses to see your running balance at a glance.

Lifestyle

Sleep Cycle Calculator

Find the best bedtime or wake-up time based on 90-minute sleep cycles.

Entertainment

Pixel Art Editor

Draw pixel art on a 16×16 grid and download it as an image.

Entertainment

Avatar Maker

Mix and match skin tone, hair, and eyes to build a simple avatar.

Entertainment

Beat Sequencer

Tap out a drum pattern on a 16-step grid and loop it.

Entertainment

Art Gallery

Browse a small gallery of famous public-domain paintings.

Entertainment

Interactive Story

Choose your path through a short branching adventure story.

Entertainment

Digital Zen Garden

Drag your finger to rake calming patterns in the sand around the stones.

Entertainment

Soundboard

Tap buttons to play fun synthesized sound effects instantly.

Entertainment

Wallpaper Generator

Generate a gradient, dot, wave, or geometric pattern wallpaper and download it.

Entertainment

Star Map

Browse well-known constellations and learn a bit about each one.

Entertainment

Life Timeline

Log the milestones of your life and see them laid out chronologically.

Science

Spring Oscillation

Watch a mass on a spring bounce and see how mass, stiffness, and damping change the motion.

Science

Pendulum Motion

Swing a pendulum and see how its length changes the period of each swing.

Science

Friction on an Incline

Adjust the incline angle and friction coefficient to see whether a block slides.

Science

Free Fall: Vacuum vs. Air Resistance

Compare falling in a vacuum against falling with air resistance and see the terminal velocity.

Science

Collision Simulator

Set two masses and velocities and watch an elastic collision play out.

Science

Circular Motion

Adjust radius and speed to see centripetal force and acceleration on an orbiting mass.

Science

PID Control

Tune P, I, and D gains and watch how the system responds — overshoot, oscillation, or a smooth approach.

Science

Circuit Simulator

Adjust voltage and resistance and watch an LED brighten as current increases, following Ohm's law.

Science

Center of Mass

Drag point masses around and watch the center of mass update in real time.

Science

Moment of Inertia

Compare how a disk, ring, rod, or sphere resist rotation for the same mass and radius.

Science

Wave Interference

See how two wave sources combine to create bright and dark interference fringes.

$Light Refraction$

Science

Light Refraction

Adjust the angle and refractive indices to see how light bends passing between two materials.

Science

Lens Imaging

Move an object and change the focal length to see where a lens forms its image.

Science

Doppler Effect

Watch a moving sound source and see how the perceived frequency shifts as it approaches and recedes.

Science

Magnetic Field Lines

See how field lines curve for a single magnet and how two magnets attract or repel.

Science

Concrete Strength Estimator

Estimate compressive strength from a mix ratio and see how it develops as it cures.

Science

Stress-Strain Curve

Compare how steel, aluminum, and copper stretch and yield under load.

Science

Heat Conduction

See how wall thickness and material affect the temperature gradient and heat flow.

Science

Parachute Descent

Jump, then deploy the parachute and see how the descent speed slows.

Science

Orbital Mechanics

Adjust a satellite's altitude and see how its orbital speed and period change.

Science

Beam Deflection

Load a simply-supported beam and watch it bend, with the max deflection calculated for you.

Science

Wind Tunnel

Compare drag force on different shapes — sphere, cube, streamlined body, and flat plate.

Science

Fluid Streamlines

See how flow lines split and rejoin as fluid streams around a circular obstacle.

Science

T-Test Calculator

Enter two groups of numbers to see if their means differ significantly.

Science

Correlation & Regression

Plot x,y data points to see their correlation and best-fit line.

Science

Probability Distribution

Shape a normal distribution curve and find the probability of a range of values.

Science

Integral Visualizer

See the area under a curve build up as a sum of rectangles, approximating the integral.

Science

Derivative & Tangent Slope

Slide a point along a curve and watch the tangent line follow, showing the slope at each point.

Science

Prime Number Spiral

See prime numbers plotted on an Ulam spiral, revealing surprising diagonal patterns.

Science

Bayesian Estimation

See how a positive test result updates your belief, given the base rate and test accuracy.

Science

Complex Number Plane

Multiply two complex numbers and see how their magnitudes multiply and angles add on the plane.

Science

Vector Addition

Drag two vectors and see their sum drawn as the diagonal of the parallelogram.

Science

Matrix Transformation

Apply a 2×2 matrix to a square and see it rotate, scale, shear, or reflect.

Science

Poisson Distribution

Adjust the average event rate and see how the Poisson distribution shape changes.

Science

Monte Carlo Pi Estimator

Drop random points into a square and watch the ratio inside the circle approximate π.

Science

Polygon Area Calculator

Tap to place vertices and see the area and perimeter of your polygon calculated live.

Science

Golden Ratio

See a rectangle divided again and again by the golden ratio, forming the classic spiral pattern.

Science

Sequence Convergence

Watch classic sequences like (1+1/n)ⁿ converge toward their famous limits.

Science

3D Rotation

Rotate a cube around the X, Y, and Z axes and watch it project onto the 2D screen.

Science

Differential Equation Solver

Compare Euler's method against Runge-Kutta 4 for solving a damped oscillator equation.

Science

Fourier Series

See how adding more sine wave harmonics builds up square, sawtooth, and triangle waves.

Science

Venn Diagram Calculator

Adjust two set sizes and their overlap to see the union and each region's count.

Science

Probability Tree

See every possible outcome of repeated events and their combined probability.

Science

Measurement Error Analysis

Enter a set of measurements and the true value to see absolute, relative, and standard errors.

Science

Permutations & Combinations

Enter n and r to instantly calculate nPr and nCr.

Lifestyle

Compound Interest Visualizer

See how regular contributions and compound growth build your balance over the years.

Lifestyle

Pension Simulator

Simulate saving through your working years and drawing down through retirement.

Lifestyle

Net Salary Calculator

Estimate your take-home pay after progressive tax and social insurance deductions.

Lifestyle

Prorata Calculator

Calculate a prorated amount for a partial billing period, like rent or a subscription.

Lifestyle

Reverse Tax Calculator

Enter a tax-included price to find the pre-tax amount and the tax portion.

Lifestyle

Percent Change Calculator

Enter an old and new value to instantly find the percent increase or decrease.

Lifestyle

Goal Progress Tracker

Enter your current progress and target to see a visual completion percentage.

Lifestyle

Calorie Needs Calculator

Estimate your basal metabolic rate and daily calorie needs based on your activity level.

Lifestyle

BMI Trend Tracker

Log a series of weight measurements to see your BMI trend over time.

Lifestyle

Recipe Scaler

Enter your ingredients and change the serving size to scale every quantity automatically.

Lifestyle

Fridge Inventory

Track what's in your fridge and get warned before items expire.

Lifestyle

Travel Budget Allocator

Split your total travel budget across accommodation, food, transport, and more.

Lifestyle

Electricity Bill Simulator

Estimate your monthly electricity cost from your appliances' wattage and daily usage.

Utility

File Transfer Time

Calculate how long a file transfer will take based on its size and your connection speed.

Lifestyle

Brick & Wall Material Calculator

Enter wall dimensions and brick size to find out how many bricks you'll need.

Lifestyle

Wiring Voltage Drop Calculator

Check whether your wire gauge and run length keep voltage drop within a safe range.

Lifestyle

Paint Area Calculator

Enter wall size, openings, and coats to find how much paint you'll need.

Lifestyle

Concrete Mix Calculator

Enter your target volume and mix type to find how much cement, sand, and gravel you need.

Science

Pipe Flow Velocity

Enter flow rate and pipe diameter to find velocity and whether the flow is laminar or turbulent.

Lifestyle

Fuel Economy Calculator

Enter distance and fuel used to see your consumption in L/100km, km/L, and MPG.

Lifestyle

Piggy Bank Simulator

See how quickly a daily savings amount adds up to reach your goal.

Lifestyle

Inflation Impact Calculator

See how inflation erodes purchasing power and inflates prices over time.

Utility

Color Space Converter

Pick a color and see it instantly converted between RGB, HSL, and CMYK.

Utility

Bitrate & File Size Calculator

Estimate the file size of video or audio from its bitrate and duration.

Utility

JSON Tree Viewer

Paste JSON and explore it as a collapsible, color-coded tree.

Utility

Password Strength Checker

Type a password to see its estimated entropy and strength rating in real time.

Utility

Unicode Character Inspector

See the code point, UTF-8 bytes, and HTML entity for every character you type.

Utility

Hash Generator

Compute SHA-1, SHA-256, SHA-384, or SHA-512 hashes of any text, entirely in your browser.

Science

Prime Factorization

Enter any number and instantly see its prime factorization.

Science

pH Calculator

Convert between pH and hydrogen ion concentration, and see if a solution is acidic or basic.

Science

Musical Note Frequencies

Tap any note to hear its equal-temperament frequency, calculated from A4 = 440Hz.

Utility

Metric vs Imperial Comparison

See height, weight, distance, temperature, and volume side-by-side in metric and imperial units.

Utility

Latitude/Longitude Converter

Convert decimal coordinates to degrees, minutes, and seconds notation.

Utility

Date Difference Calculator

Pick two dates to find the total days between them and a years/months/days breakdown.

Utility

Bit Manipulation Visualizer

Tap bits to toggle them and see AND, OR, XOR, NOT, and shift operations live.

Utility

Font Comparison

Type sample text and see it rendered side-by-side in several classic web-safe fonts.

Utility

Unit Converter

Convert between length, mass, temperature, volume, area, and speed units instantly.

Utility

QR Code Generator

Turn any link or text into a scannable QR code — generated entirely on your device.

Utility

Password Generator

Generate a strong, random password with the character types and length you choose.

Lifestyle

Pomodoro Timer

Work in focused sprints with short breaks, using the classic Pomodoro technique.

Utility

Color Palette Generator

Generate a matching 5-color palette from any base color, or roll a random one.

Utility

World Clock

See the current time in cities around the world, side by side.

Utility

Image Resizer & Converter

Resize, compress, and convert images between JPG, PNG, and WebP — entirely on your device.

Utility

Regex Tester

Test regular expressions against sample text with live highlighting of every match.

Utility

Proofreader

Paste your text to catch double spaces, repeated words, and other easy-to-miss mechanical slips.

Utility

Markdown Editor

Write Markdown on the left, see the formatted preview update live on the right.

Utility

JSON Formatter

Format, validate, and minify JSON data — spot syntax errors instantly.

Science

Function Grapher

Plot any mathematical function of x and explore its shape by adjusting the range.

Science

Statistics Calculator

Enter a list of numbers to instantly get mean, median, mode, variance, and standard deviation.

Science

Projectile Motion Simulator

Simulate projectile motion under gravity — adjust speed, angle, and gravity to see the trajectory change.

Science

Molar Mass Calculator

Enter a chemical formula like Ca(OH)2 to compute its molar mass and element breakdown.

Science

Loan & Savings Calculator

Estimate monthly loan payments or project savings growth with compound interest.

Science

BMI Calculator

Calculate your Body Mass Index from weight and height, with an instant category readout.

Science

Moon Phase Calendar

See the moon's phase and illumination for any date, calculated on the spot.

Science

Trend Predictor

Enter a series of numbers and project the next values based on the linear trend.

Science

Scientific Unit Converter

Convert between pressure, energy, power, data storage, and frequency units.

Science

Fractal Viewer

Explore the Mandelbrot and Julia sets — click anywhere to zoom into the pattern.

Learning

Flashcards

Flip through flashcards to test your recall — shuffle for a fresh order anytime.

Learning

Typing Practice

Type the sentence shown to measure your speed (WPM) and accuracy.

Learning

Phrase Comparison

See how a common phrase is said in all 10 supported languages, side by side.

Learning

Quote of the Day

A new inspiring quote every day, with more to discover whenever you like.

Learning

History Timeline

Scroll through major world events from ancient history to the modern era.

Learning

Quiz Portal

Test your general knowledge with a short multiple-choice quiz and see your score.

Learning

Algorithm Glossary

Look up common programming and algorithm terms with plain-language explanations.

Learning

Reading Tracker

Keep a simple list of books you want to read, are reading, or have finished.

Learning

Grammar Checker

Catch common English grammar slips like a/an mix-ups and double negatives.

Learning

Logic Puzzles

Solve short riddles and brain teasers, one at a time.

Lifestyle

Meal Suggester

Check off ingredients you have on hand and get recipe suggestions.

Lifestyle

To-Do List

A simple, no-frills task list that stays on your device.

Lifestyle

Habit Tracker

Track daily habits on a 7-day grid and watch your streak grow.

Lifestyle

Mind Map

Sketch out ideas as a draggable node map branching from a central topic.

Lifestyle

Travel Planner

Check off your packing list and track your trip budget in one place.

Lifestyle

Breathing Guide

Follow a visual breathing rhythm — box breathing, 4-7-8, and more.

Lifestyle

Random Decider

Can't decide? Enter your options or flip a coin to let chance choose.

Lifestyle

Budget Tracker

Log income and expenses to see your running balance at a glance.

Lifestyle

Sleep Cycle Calculator

Find the best bedtime or wake-up time based on 90-minute sleep cycles.

Entertainment

Pixel Art Editor

Draw pixel art on a 16×16 grid and download it as an image.

Entertainment

Avatar Maker

Mix and match skin tone, hair, and eyes to build a simple avatar.

Entertainment

Beat Sequencer

Tap out a drum pattern on a 16-step grid and loop it.

Entertainment

Art Gallery

Browse a small gallery of famous public-domain paintings.

Entertainment

Interactive Story

Choose your path through a short branching adventure story.

Entertainment

Digital Zen Garden

Drag your finger to rake calming patterns in the sand around the stones.

Entertainment

Soundboard

Tap buttons to play fun synthesized sound effects instantly.

Entertainment

Wallpaper Generator

Generate a gradient, dot, wave, or geometric pattern wallpaper and download it.

Entertainment

Star Map

Browse well-known constellations and learn a bit about each one.

Entertainment

Life Timeline

Log the milestones of your life and see them laid out chronologically.

Science

Spring Oscillation

Watch a mass on a spring bounce and see how mass, stiffness, and damping change the motion.

Science

Pendulum Motion

Swing a pendulum and see how its length changes the period of each swing.

Science

Friction on an Incline

Adjust the incline angle and friction coefficient to see whether a block slides.

Science

Free Fall: Vacuum vs. Air Resistance

Compare falling in a vacuum against falling with air resistance and see the terminal velocity.

Science

Collision Simulator

Set two masses and velocities and watch an elastic collision play out.

Science

Circular Motion

Adjust radius and speed to see centripetal force and acceleration on an orbiting mass.

Science

PID Control

Tune P, I, and D gains and watch how the system responds — overshoot, oscillation, or a smooth approach.

Science

Circuit Simulator

Adjust voltage and resistance and watch an LED brighten as current increases, following Ohm's law.

Science

Center of Mass

Drag point masses around and watch the center of mass update in real time.

Science

Moment of Inertia

Compare how a disk, ring, rod, or sphere resist rotation for the same mass and radius.

Science

Wave Interference

See how two wave sources combine to create bright and dark interference fringes.

$Light Refraction$

Science

Light Refraction

Adjust the angle and refractive indices to see how light bends passing between two materials.

Science

Lens Imaging

Move an object and change the focal length to see where a lens forms its image.

Science

Doppler Effect

Watch a moving sound source and see how the perceived frequency shifts as it approaches and recedes.

Science

Magnetic Field Lines

See how field lines curve for a single magnet and how two magnets attract or repel.

Science

Concrete Strength Estimator

Estimate compressive strength from a mix ratio and see how it develops as it cures.

Science

Stress-Strain Curve

Compare how steel, aluminum, and copper stretch and yield under load.

Science

Heat Conduction

See how wall thickness and material affect the temperature gradient and heat flow.

Science

Parachute Descent

Jump, then deploy the parachute and see how the descent speed slows.

Science

Orbital Mechanics

Adjust a satellite's altitude and see how its orbital speed and period change.

Science

Beam Deflection

Load a simply-supported beam and watch it bend, with the max deflection calculated for you.

Science

Wind Tunnel

Compare drag force on different shapes — sphere, cube, streamlined body, and flat plate.

Science

Fluid Streamlines

See how flow lines split and rejoin as fluid streams around a circular obstacle.

Science

T-Test Calculator

Enter two groups of numbers to see if their means differ significantly.

Science

Correlation & Regression

Plot x,y data points to see their correlation and best-fit line.

Science

Probability Distribution

Shape a normal distribution curve and find the probability of a range of values.

Science

Integral Visualizer

See the area under a curve build up as a sum of rectangles, approximating the integral.

Science

Derivative & Tangent Slope

Slide a point along a curve and watch the tangent line follow, showing the slope at each point.

Science

Prime Number Spiral

See prime numbers plotted on an Ulam spiral, revealing surprising diagonal patterns.

Science

Bayesian Estimation

See how a positive test result updates your belief, given the base rate and test accuracy.

Science

Complex Number Plane

Multiply two complex numbers and see how their magnitudes multiply and angles add on the plane.

Science

Vector Addition

Drag two vectors and see their sum drawn as the diagonal of the parallelogram.

Science

Matrix Transformation

Apply a 2×2 matrix to a square and see it rotate, scale, shear, or reflect.

Science

Poisson Distribution

Adjust the average event rate and see how the Poisson distribution shape changes.

Science

Monte Carlo Pi Estimator

Drop random points into a square and watch the ratio inside the circle approximate π.

Science

Polygon Area Calculator

Tap to place vertices and see the area and perimeter of your polygon calculated live.

Science

Golden Ratio

See a rectangle divided again and again by the golden ratio, forming the classic spiral pattern.

Science

Sequence Convergence

Watch classic sequences like (1+1/n)ⁿ converge toward their famous limits.

Science

3D Rotation

Rotate a cube around the X, Y, and Z axes and watch it project onto the 2D screen.

Science

Differential Equation Solver

Compare Euler's method against Runge-Kutta 4 for solving a damped oscillator equation.

Science

Fourier Series

See how adding more sine wave harmonics builds up square, sawtooth, and triangle waves.

Science

Venn Diagram Calculator

Adjust two set sizes and their overlap to see the union and each region's count.

Science

Probability Tree

See every possible outcome of repeated events and their combined probability.

Science

Measurement Error Analysis

Enter a set of measurements and the true value to see absolute, relative, and standard errors.

Science

Permutations & Combinations

Enter n and r to instantly calculate nPr and nCr.

Lifestyle

Compound Interest Visualizer

See how regular contributions and compound growth build your balance over the years.

Lifestyle

Pension Simulator

Simulate saving through your working years and drawing down through retirement.

Lifestyle

Net Salary Calculator

Estimate your take-home pay after progressive tax and social insurance deductions.

Lifestyle

Prorata Calculator

Calculate a prorated amount for a partial billing period, like rent or a subscription.

Lifestyle

Reverse Tax Calculator

Enter a tax-included price to find the pre-tax amount and the tax portion.

Lifestyle

Percent Change Calculator

Enter an old and new value to instantly find the percent increase or decrease.

Lifestyle

Goal Progress Tracker

Enter your current progress and target to see a visual completion percentage.

Lifestyle

Calorie Needs Calculator

Estimate your basal metabolic rate and daily calorie needs based on your activity level.

Lifestyle

BMI Trend Tracker

Log a series of weight measurements to see your BMI trend over time.

Lifestyle

Recipe Scaler

Enter your ingredients and change the serving size to scale every quantity automatically.

Lifestyle

Fridge Inventory

Track what's in your fridge and get warned before items expire.

Lifestyle

Travel Budget Allocator

Split your total travel budget across accommodation, food, transport, and more.

Lifestyle

Electricity Bill Simulator

Estimate your monthly electricity cost from your appliances' wattage and daily usage.

Utility

File Transfer Time

Calculate how long a file transfer will take based on its size and your connection speed.

Lifestyle

Brick & Wall Material Calculator

Enter wall dimensions and brick size to find out how many bricks you'll need.

Lifestyle

Wiring Voltage Drop Calculator

Check whether your wire gauge and run length keep voltage drop within a safe range.

Lifestyle

Paint Area Calculator

Enter wall size, openings, and coats to find how much paint you'll need.

Lifestyle

Concrete Mix Calculator

Enter your target volume and mix type to find how much cement, sand, and gravel you need.

Science

Pipe Flow Velocity

Enter flow rate and pipe diameter to find velocity and whether the flow is laminar or turbulent.

Lifestyle

Fuel Economy Calculator

Enter distance and fuel used to see your consumption in L/100km, km/L, and MPG.

Lifestyle

Piggy Bank Simulator

See how quickly a daily savings amount adds up to reach your goal.

Lifestyle

Inflation Impact Calculator

See how inflation erodes purchasing power and inflates prices over time.

Utility

Color Space Converter

Pick a color and see it instantly converted between RGB, HSL, and CMYK.

Utility

Bitrate & File Size Calculator

Estimate the file size of video or audio from its bitrate and duration.

Utility

JSON Tree Viewer

Paste JSON and explore it as a collapsible, color-coded tree.

Utility

Password Strength Checker

Type a password to see its estimated entropy and strength rating in real time.

Utility

Unicode Character Inspector

See the code point, UTF-8 bytes, and HTML entity for every character you type.

Utility

Hash Generator

Compute SHA-1, SHA-256, SHA-384, or SHA-512 hashes of any text, entirely in your browser.

Science

Prime Factorization

Enter any number and instantly see its prime factorization.

Science

pH Calculator

Convert between pH and hydrogen ion concentration, and see if a solution is acidic or basic.

Science

Musical Note Frequencies

Tap any note to hear its equal-temperament frequency, calculated from A4 = 440Hz.

Utility

Metric vs Imperial Comparison

See height, weight, distance, temperature, and volume side-by-side in metric and imperial units.

Utility

Latitude/Longitude Converter

Convert decimal coordinates to degrees, minutes, and seconds notation.

Utility

Date Difference Calculator

Pick two dates to find the total days between them and a years/months/days breakdown.

Utility

Bit Manipulation Visualizer

Tap bits to toggle them and see AND, OR, XOR, NOT, and shift operations live.

Utility

Font Comparison

Type sample text and see it rendered side-by-side in several classic web-safe fonts.

Useful tools, instantly, anywhere in the world

Tools

Unit Converter

QR Code Generator

Password Generator

Pomodoro Timer

Color Palette Generator

World Clock

Image Resizer & Converter

Regex Tester

Proofreader

Markdown Editor

JSON Formatter

Function Grapher

Statistics Calculator

Projectile Motion Simulator

Molar Mass Calculator

Loan & Savings Calculator

BMI Calculator

Moon Phase Calendar

Trend Predictor

Scientific Unit Converter

Fractal Viewer

Flashcards

Typing Practice

Phrase Comparison

Quote of the Day

History Timeline

Quiz Portal

Algorithm Glossary

Reading Tracker

Grammar Checker

Logic Puzzles

Meal Suggester

To-Do List

Habit Tracker

Mind Map

Travel Planner

Breathing Guide

Random Decider

Budget Tracker

Sleep Cycle Calculator

Pixel Art Editor

Avatar Maker

Beat Sequencer

Art Gallery

Interactive Story

Digital Zen Garden

Soundboard

Wallpaper Generator

Star Map

Life Timeline

Spring Oscillation

Pendulum Motion

Friction on an Incline

Free Fall: Vacuum vs. Air Resistance

Collision Simulator

Circular Motion

PID Control

Circuit Simulator

Center of Mass

Moment of Inertia

Wave Interference

Light Refraction

Lens Imaging

Doppler Effect

Magnetic Field Lines

Concrete Strength Estimator

Stress-Strain Curve

Heat Conduction

Parachute Descent

Orbital Mechanics

Beam Deflection

Wind Tunnel

Fluid Streamlines

T-Test Calculator

Correlation & Regression

Probability Distribution

Integral Visualizer

Derivative & Tangent Slope