Free Online Tools That Just Work

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ConvertFlow

Convert, compress, resize, and crop images. Supports PNG, JPG, WebP, AVIF, BMP. Batch processing supported.

Image Convert Compress Resize Crop

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TextGlow

Format text into professional emails, resumes, and reports. Case conversion, JSON prettify, Base64, URL encode, and 20+ text tools.

Text Format Case Convert Email Template

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PulseTimer

Interval timer for HIIT, Tabata, boxing, Pomodoro, and custom workouts. Audio cues, progress ring, preset workouts.

HIIT Tabata Pomodoro Boxing

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Driftone

Mix 18 ambient sounds for sleep, focus, and relaxation. Rain, ocean, forest, white/pink/brown noise. Sleep timer included.

White Noise Sleep Focus Tinnitus

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PawLog

Track your pet's health records, vaccinations, medications, vet visits, and weight. All data stored locally on your device.

Pet Health Vaccines Weight Chart

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Percentage Calculator

Calculate percentages instantly. Find X% of Y, percentage change, increase and decrease. Four calculators in one.

Percentage Math Calculator

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Password Generator

Generate strong, random passwords. Customize length, characters, symbols. Strength meter and one-click copy.

Password Security Generator

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QR Code Generator

Create QR codes for URLs, text, WiFi, email, and phone numbers. Download as PNG. Free, no limits.

QR Code URL WiFi

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Age Calculator

Find your exact age in years, months, days, hours, and minutes. Days until next birthday and born-on day.

Age Birthday Date

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Random Number Generator

Generate random numbers, roll dice, flip coins, pick lottery numbers. Cryptographically secure randomness.

Random Dice Lottery

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Tip Calculator

Calculate tips and split bills. Quick preset buttons for 10-25%. Per-person split for group dining.

Tip Bill Split Restaurant

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Image Resizer

Resize images to exact dimensions or scale by percentage. Supports JPG, PNG, WebP. Convert formats too.

Resize Image Dimensions

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Color Picker

Pick colors and get HEX, RGB, HSL codes. RGB sliders, palette generator, one-click copy. Perfect for designers.

Color HEX RGB Palette

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JSON Formatter

Format, validate, and minify JSON. Syntax checking, error messages, tab support. Essential developer tool.

JSON Formatter Validator

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Word Counter

Count words, characters, sentences, paragraphs. Reading time estimate. Keyword density analysis.

Word Count Character Reading Time

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BMI Calculator

Calculate your Body Mass Index instantly. Metric and imperial units. BMI category, healthy weight range, and health tips.

BMI Health Weight

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Unit Converter

Convert length, weight, temperature, volume, speed, area, time, and data units. 30+ units supported.

Length Weight Temperature

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Loan Calculator

Calculate monthly payments, total interest, and full amortization schedule for mortgages, auto, and personal loans.

Mortgage Loan Amortization

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Countdown Timer

Set countdown timers with presets or custom duration. Stopwatch with lap tracking. Alarm sound when done.

Timer Stopwatch Pomodoro

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Image Compressor

Compress JPEG, PNG, WebP images without losing quality. Drag and drop, batch processing, instant download.

Compress Image Optimize

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Invoice Generator

Create professional invoices with line items, tax, and discounts. Download as PDF. No signup, no watermark.

Invoice Billing Freelance

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Lorem Ipsum Generator

Generate placeholder text for designs. Paragraphs, sentences, or words. One-click copy.

Lorem Ipsum Placeholder Design

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Base64 Encoder

Encode text to Base64 and decode Base64 to text. Essential developer tool. All processing in browser.

Base64 Encode Developer

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Markdown Editor

Write Markdown with live preview. Toolbar, code blocks, tables, export to HTML. GitHub-flavored Markdown.

Markdown Editor Preview

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Hex to RGB Converter

Convert HEX to RGB, HSL, and CMYK. Color preview, sliders, one-click copy. Essential for web designers.

HEX RGB HSL CMYK

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Compound Interest Calculator

See how your savings grow with compound interest. Daily, monthly, or yearly compounding. Growth chart and year-by-year breakdown.

Compound Interest Savings Investment

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Paycheck Calculator

Estimate your take-home pay after federal tax, state tax, Social Security, Medicare, and 401(k). Per-paycheck breakdown.

Paycheck Salary Tax

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Electricity Cost Calculator

Find out how much any appliance costs to run. Enter watts and hours, see daily, monthly, and yearly electricity costs.

Electricity Power Energy Cost

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Rent vs Buy Calculator

Compare the true cost of renting vs buying a home. Factors in mortgage, taxes, maintenance, insurance, and investment returns.

Housing Rent Buy

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Split Bill Calculator

Split restaurant bills fairly. Add individual items, shared items, tip, and tax. See exactly what each person owes.

Bill Split Restaurant Group

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Body Fat Calculator

Calculate body fat percentage using the US Navy method. Just height, waist, neck, and hip measurements needed.

Body Fat Fitness Health

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TDEE & Calorie Calculator

Calculate your daily calorie needs. TDEE, BMR, weight loss, maintenance, and muscle gain calories with macro breakdown.

Calories TDEE Macros

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Due Date Calculator

Calculate your baby's due date from LMP, conception, or IVF date. Week-by-week milestones and trimester timeline.

Pregnancy Due Date Baby

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GPA Calculator

Calculate your college or high school GPA. Add courses, grades, and credits. Semester and cumulative GPA on 4.0 scale.

GPA College Grades

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Mortgage Affordability

How much house can you afford? Based on income, debts, down payment. Conservative, moderate, and aggressive estimates.

Mortgage Affordability Home

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Concrete Calculator

How many bags of concrete for slabs, footings, post holes. Cubic yards and bag count with cost estimate.

ConcreteDIYConstruction

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Paint Calculator

How many gallons of paint for a room. Accounts for doors, windows, coats, and ceiling.

PaintRoomGallons

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Mulch & Gravel Calculator

Cubic yards of mulch, gravel, topsoil, or sand for landscaping. Weight and bag count included.

MulchGravelLandscaping

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Tile Calculator

How many tiles for floor or wall. Supports custom sizes, grout lines, waste factor, and cost.

TileFloorGrout

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Fence Calculator

Posts, rails, pickets, and concrete for any fence project. Material list with full cost breakdown.

FencePostsPickets

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Pool Chemical Calculator

Calculate chlorine, pH adjuster dosages for your pool volume. Keep water perfectly balanced.

PoolChlorinepH

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Debt Payoff Calculator

Snowball vs Avalanche comparison. See your debt-free date and total interest savings.

DebtSnowballAvalanche

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FIRE Calculator

When can you retire early? Financial Independence calculator based on savings rate and 4% rule.

FIRERetirement4% Rule

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Pizza Dough Calculator

Exact flour, water, salt, yeast for any number of pizzas. Neapolitan, NY, Roman, Sourdough styles.

PizzaDoughBaking

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Generator Size Calculator

What size generator for your home? Select appliances and get exact wattage recommendation.

GeneratorWattsBackup