Yawn Tools

Tools so boring,
they'll make you yawn.

79 free utility tools that do exactly one thing and do it well. No signup. No ads. No nonsense. Just the tool you need, when you need it.

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Finance

(18)

Compound Interest

Watch your money grow. Real-time charts, multiple scenarios, and amortization schedules.

Mortgage Calculator

Home price, down payment, rate, term. See monthly payment, total interest, and full amortization.

Auto Loan Calculator

Vehicle price, trade-in, rate, term. Monthly payment and total interest for any car loan.

Loan Calculator

Any loan. Principal, rate, term, and monthly payment.

Credit Card Payoff

Balance, APR, monthly payment. See how long to pay it off and total interest paid.

Savings Goal

Set a target, tell us what you can save monthly. See how long until you hit your goal.

Investment Growth

Initial investment, monthly contributions, expected return. Watch it compound over decades.

Retirement Planner

Current age, savings rate, return rate. See if you're on track for retirement.

ROI Calculator

Investment cost and return. Calculate ROI, annualized return, and profit.

Debt-to-Income

Monthly debts vs income. See your DTI ratio and whether lenders will approve you.

Refinance Calculator

Current rate vs new rate. See if refinancing saves you money.

Sales Tax Calculator

Enter price and tax rate. Get the tax amount and total instantly.

Income Tax Estimator

Estimate your federal income tax with brackets, deductions, and take-home pay.

Net Worth Calculator

Assets minus liabilities. Track your net worth and see where you stand.

Rent vs Buy

Compare renting vs buying. See the break-even timeline and total cost of each.

Amortization Calculator

Full amortization schedule for any loan. See principal vs interest for every payment.

Tip Calculator

Type your receipt total. See common tip amounts instantly. Split the bill beautifully.

Salary Calculator

Hourly to salary, job offer comparison, freelance rate finder. Know what you're worth.

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Health & Fitness

(11)

Calorie & TDEE

BMR, TDEE, weight projection, and macro breakdown. Know your numbers in seconds.

BMI Calculator

Height and weight to BMI. See your category and what your number means.

BMR Calculator

Basal Metabolic Rate. How many calories you burn at complete rest.

Body Fat Calculator

US Navy method. Neck, waist, hips, height. Estimate your body fat percentage.

Ideal Weight

Multiple formulas give your ideal weight range based on height and sex.

Water Intake

Body weight and activity level to daily water intake recommendation.

Heart Rate Zones

Max heart rate and training zones. Fat burn, cardio, peak, for any age.

Pregnancy Due Date

Last period or conception date to estimated due date and week-by-week timeline.

Macro Calculator

Protein, carbs, fat split by goal. Cut, maintain, or bulk.

Running Pace

Distance and time to pace per mile/km. Also finish-time predictions.

Sleep Calculator

Bedtime or wake-up time to optimal sleep cycles. Wake up feeling rested.

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Math

(11)

Percentage Calculator

Markups, margins, discounts, increases. Every percentage question, one place.

Fraction Calculator

Add, subtract, multiply, divide fractions. Simplified results.

Scientific Calculator

Trig, log, powers, roots, constants. Full scientific calculator in your browser.

Quadratic Solver

Solve ax² + bx + c = 0. Real and complex roots with steps.

Ratio Calculator

Solve and simplify ratios. Scale them up or find missing values.

LCM & GCD

Greatest common divisor and least common multiple for any set of numbers.

Average Calculator

Mean, median, mode, range. Paste numbers, get stats instantly.

Std Deviation

Population and sample standard deviation, variance, and more.

Proportion Solver

Solve A/B = C/D. Find any missing value in a proportion.

Factorial Calculator

n! for any non-negative integer. Handles large factorials with scientific notation.

Statistics Tool

Comprehensive stats. Mean, median, mode, SD, variance, quartiles, range.

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Text & Writing

(9)

Text Stats

Word, character, sentence counts. Reading time, readability score, keyword density.

Word Counter

Word, character, sentence, paragraph counts. Reading time and keyword frequency.

Case Converter

UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case. Instant.

Lorem Ipsum

Generate paragraphs, sentences, or words of placeholder lorem ipsum text.

Text Diff Checker

Compare two text blocks. See additions and removals highlighted.

Slug Generator

Turn any title into a URL-safe slug. Customize separator and case.

Markdown Preview

Type markdown, see it rendered live. Copy HTML output.

Text Reverser

Reverse text, words, or lines. Flip text upside down too.

ROT13 Converter

ROT13 encode or decode any text. Also supports ROT1-25 rotations.

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Random & Chance

(8)

Random Number

Generate random numbers in any range. Unique, sorted, or bulk generation.

Random Picker

Paste a list, pick one or many random items. Great for raffles and decisions.

Coin Flipper

Flip a coin. Track stats. Heads, tails, streaks. Multiple flips at once.

Dice Roller

Roll any number of dice with any sides. D4, D6, D8, D10, D20, D100, or custom.

Random String

Generate random strings with custom charsets and lengths. Great for tokens.

Random Color

Generate random colors in HEX, RGB, HSL. Lock favorites, build palettes.

Lottery Generator

Generate lottery numbers for Powerball, Mega Millions, or custom format.

Team Generator

Add players, pick team count, randomize. Fair and instant team assignment.

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Time & Date

(7)

Date Calculator

Days between dates, add or subtract time, business day calculations. Date math, solved.

Age Calculator

Birthdate to exact age in years, months, days. Also total weeks, hours, minutes.

Time Zone Converter

Convert times across time zones. See multiple cities side by side.

Countdown Timer

Count down to any date and time. See days, hours, minutes, seconds remaining.

Business Days

Add or subtract business days. Skip weekends and optional holidays.

Work Hours

Clock in, clock out, break time. Calculate total hours worked and pay.

Unix Timestamp

Convert between Unix timestamps and human-readable dates. Both directions.

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Web & Dev

(9)

Password Generator

Strong, random passwords with entropy meter and crack-time estimate. Nothing leaves your browser.

Hash Generator

SHA-1, SHA-256, SHA-384, SHA-512. Hash any text instantly in your browser.

Base64 Encode/Decode

Encode text to Base64 or decode Base64 to text. Handles Unicode.

URL Encode/Decode

URL-encode or decode text. Percent-encoding for query params and paths.

JSON Formatter

Format, minify, and validate JSON. Syntax errors highlighted with messages.

UUID Generator

Generate v4 UUIDs. One or batch. Copy-ready, RFC 4122 compliant.

Regex Tester

Test regex against text. See matches highlighted with groups and flags.

QR Code Generator

Generate QR codes for URLs, text, WiFi, and more. Download as PNG.

CSS Minifier

Minify CSS by removing whitespace, comments, and redundant characters.

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Utility

(6)

Unit Converter

Length, weight, temperature, time, data. Type what you want, get the answer instantly.

Color Tool

HEX, RGB, HSL conversion, WCAG contrast checking, and harmonious palette generation.

Temperature Converter

Celsius, Fahrenheit, Kelvin. Type in one, get all three instantly.

Fuel Cost Calculator

Distance, MPG, gas price to total trip fuel cost. Compare vehicles.

GPA Calculator

Add courses and grades. Calculate GPA on 4.0 or other scales.

Grade Calculator

Weighted grade calculator. Enter assignments, weights, and targets.

More tools coming. They'll make you yawn too.

Tools so boring,they'll make you yawn.