Tools Collection
A collection of useful tools for everyday tasks.
Health & Relaxation
List of Emotions
83 emotion words in 8 core families, from everyday feelings to their strongest forms. Free printable PDF.
Emotion Wheel
Interactive feelings wheel: 8 core emotion families, 81 precise words, free printable PDF.
Find Your Flow State
A mindful immersion system to help you find your flow.
Relaxation Aid
Simple breathing exercises and calming sounds.
Prayer & Meditation
Experience a serene eclipse animation for spiritual reflection and inner peace.
TV Static
Simulated white noise and visual relaxation with customizable patterns
Bilateral Stimulation
Left–right rhythmic pacing for calm — visual dot or stereo tones, with butterfly-hug and safe-place guidance.
Allergy Records
Track and manage your baby's food allergy records.
Eye Rest Training
Science-based eye exercises to relieve screen fatigue. Guided blinking, focus shifting, and tracking exercises.
Sleep Calculator
Calculate your optimal sleep and wake times based on 90-minute sleep cycles.
Death Clock
Predict your life expectancy based on your lifestyle and health status.
Mortality Rate Calculator
Explore mortality timeline estimates based on demographic and lifestyle inputs.
Psychometric Tools
Z Score Calculator
Calculate Z scores and look up standard normal probabilities instantly with a free bidirectional Z-table tool.
Normal Distribution Calculator
Calculate normal distribution probabilities, visualize the bell curve, and find critical values. Free online tool with the 68-95-99.7 rule.
P-Value Calculator
Calculate the p-value from a Z or t test statistic and interpret statistical significance at the 0.05, 0.01 and 0.001 levels.
Confidence Interval Calculator
Calculate confidence intervals for a mean (known or unknown sigma) and for proportions. Supports 90%, 95% and 99% confidence levels.
Effect Size Calculator
Calculate Cohen's d and the correlation r from group means and standard deviations or from a t statistic. Interpret effect size with the 0.2 / 0.5 / 0.8 benchmarks.
Chi-Square Test Calculator
Calculate the chi-square (χ²) statistic, degrees of freedom and p-value for goodness of fit tests and tests of independence. Free online tool with automatic significance conclusions.
IV & DV Identification Practice
Practice identifying independent variables (IV) and dependent variables (DV) in psychology research scenarios with instant feedback and explanations.
Likert Scale Generator
Create customizable 4, 5, 6 or 7-point Likert scales with agreement, frequency, satisfaction and likelihood presets. Export as JSON.
Descriptive Statistics Calculator
Compute mean, median, mode, range, variance, standard deviation, quartiles, IQR and outliers for your dataset instantly.
Correlation Coefficient Calculator
Calculate Pearson correlation coefficient r with p-value, R², regression line and scatter plot from paired data.
Qualitative vs Quantitative Practice
Practice classifying data as qualitative or quantitative in research scenarios with instant feedback and explanations.
Reliability vs Validity Practice
Practice distinguishing reliability (consistency) from validity (accuracy) in psychological measurement scenarios.
Type 1 vs Type 2 Error Practice
Practice identifying Type 1 errors (false positives) and Type 2 errors (false negatives) in hypothesis testing contexts.
Attribution Style Practice
Practice spotting internal and external attributions in everyday explanations, with instant feedback and clear explanations of attribution biases.
Power & Sample Size Calculator
Calculate the required sample size per group for a two-sample t-test from an expected effect size, or the statistical power of your planned study.
Bayes Factor Calculator
Compute the JZS Bayes factor (BF10) for a t-test from a t statistic and interpret the evidence strength on the Jeffreys scale.
Cronbach's Alpha Calculator
Compute raw and standardized Cronbach's alpha for scale reliability from an item-level response matrix, including alpha if each item is deleted.
t-Test Calculator
Run a one-sample, independent two-sample or paired t-test from summary statistics and get the t statistic, p-value, Cohen's d and 95% CI.
Productivity
Alphabetizer
Sort your lists alphabetically with ease.
Word Counter
Count words, characters, and paragraphs in your text.
Words Per Page
Estimate page count based on word count.
Teleprompter
A free online teleprompter tool with mirror mode, speed control, and text customization.
Text Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case and more.
Timer
Clock Tab
A simple, clean digital clock for your browser tab.
Time Tab
Multi-functional time tools including stopwatch, countdown and alarm clock features with fullscreen display support
Countdown Timer
Set a custom countdown timer for any activity or task.
Stopwatch
Precise time tracking with lap and split timing support.
Preset Timer
Quick access to common time presets for improved productivity.
Sand Timer
A relaxing sand timer animation for meditation and focus.
Bomb Countdown
Fun bomb-style countdown timer for games and challenges.
Event Countdown
Count down to your upcoming events and important dates.
Large Digital Clock
A large, easy-to-read digital clock for presentations and classrooms.
Classroom Timers
Collection of timers designed specifically for classroom use.
Metronome
Keep precise tempo for music practice with adjustable BPM.
Interval Timer
HIIT and workout interval timer with customizable rounds.
Alarm Clock
Set alarms with custom sounds and notifications.
Split Lap Timer
Advanced stopwatch with split and lap timing for sports training.
Countdown Clock
Visual countdown clock with customizable display options.
Sensory Timer
Calming visual timer designed for sensory regulation and focus.
Loop Countdown
Repeating countdown timer that loops for continuous tasks.
Presentation Timer
Track presentation time with segment alerts and progress indicators.
Chess Clock
Professional chess clock for two-player timed games.
Analog Clock
Beautiful analog clock display with smooth second hand animation.
Egg Timer
Perfect egg cooking timer with multiple doneness levels.
Race Timers
Specialized timers for racing and track events with lane support.
Calculator
Time Calculator
Calculate time durations and dates.
Cashflow Statement
Manage your income, expenses, assets, and liabilities to simulate your financial health.
Discounted Payback Period Calculator
Calculate the payback period for discounted cash flows in financial decisions.
Box Plot Calculator
Generate a box plot from your data with the five-number summary (min, Q1, median, Q3, max) and outliers detected by the 1.5x IQR rule.
BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Supports metric and imperial units with healthy weight range recommendations.
Life Expectancy Calculator
Estimate how long you will live by age, sex, country and lifestyle - remaining years, chances of reaching 80/90/100, and what moves your number.
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE), BMR, and macronutrient breakdown using the Mifflin-St Jeor formula.
Job Worth Calculator
Score your job's real value from salary, hours, commute and environment with the viral worth formula. Free, runs in your browser.
Heart Rate Zone Calculator
Find your target training heart rate zones based on age. Perfect for running, cycling, swimming, and cardio workout planning.
1RM Calculator (One Rep Max)
Estimate your one-rep max with 6 proven formulas (Brzycki, Epley, Lander, etc.). Get a full percentage-based training weight table.
Percentage Calculator
Calculate percentages, discounts, interest rates, growth, and percentage changes. Interactive tool to find unknown values from two known numbers.
Unit Converter
Convert length, weight, temperature, volume, area, speed, data and time units in one place.
Culture & Education
Family Tree Generator
Create and visualize your family heritage. Export to PDF and print.
Birthday Color
Enter your birthday to see your lucky color and palette card.
Chinese Colors by 24 Solar Terms
Browse traditional palettes by solar terms; combine poetry and color codes to find your emotional signature in Eastern aesthetics.
Hundreds Chart
Interactive 1-100 number grid for learning counting, patterns, and arithmetic.
Multiplication Chart
Interactive multiplication table tool for learning and memorizing multiplication facts.
Chinese Numbers
Convert numbers to Chinese characters with pinyin and audio. Includes 1-100 table, large numbers, and math practice.
Chinese Zodiac Calculator
Find your Chinese Zodiac sign and its meaning based on your birth year.
Random
Coin Flip
Flip single or multiple coins instantly. Perfect for probability lessons and decision making.
Random Generator
Generate random numbers, passwords, and more.
Roll a Die
Roll virtual dice with 3D animation. Perfect for board games and RPGs.
Wheel of Names
Spin the wheel of names to pick a random winner. Great for classrooms, raffles, and giveaways.
Rock Paper Scissors
Play classic Rock Paper Scissors against the computer.
Name Picker Wheel
Randomly pick a name from a spinning wheel. Great for classrooms and team selection.
Yes or No Wheel
Spin for an instant yes or no answer, or add your own options. Free, no signup.
Duck Race
Fun duck racing game for entertainment and friendly competition.
Random Team Generator
Randomly split a list into teams or groups for activities, classes and games.
Random 4 Digit Number
Generate a random 4 digit number or a batch of unique codes — leading zeros kept. Free, no signup.
Random Number 1-10
Pick a random number between 1 and 10 in one click — no repeats option and custom ranges.
Random Number 1-100
Pick a random number between 1 and 100 instantly — batch mode, no repeats, free.
Random Letter Generator
Pick a random letter from A to Z — uppercase or lowercase, batches and no-repeat draws.
Magic 8 Ball
Ask a question and get a random fortune from the Magic 8 Ball.
Higher Lower
Guess if the next card is higher or lower in this classic card game.
Utilities
Click Counter
Count your clicks or anything else.
Internet Speed Test
Check your internet connection speed.
Message Tab
Display messages in a browser tab.
Roman Numeral Converter
Convert numbers to Roman numerals and vice versa.
Scoreboard
Track scores for games and sports easily.
Time Converter
Convert between different time units and time zones easily.
