Every tool you need, right here.

Loan Amortization Schedule

Full month-by-month payment table with extra payments.

Mortgage Affordability Calculator

How much house can I afford?

Percentage Calculator (All Modes)

X% of Y, % change, reverse percentages.

Age Calculator

Exact age in years, months, days + next birthday.

Image Resizer & Compressor

Resize and shrink JPG/PNG/WebP, nothing uploaded.

QR Code Generator

QR codes for links, Wi-Fi and contacts.

A/B Test Significance Calculator

Is variant B really better? Plus sample size.

UTM Link Builder

Campaign tracking links + QR code.

All tools

Loan Amortization Schedule

Full month-by-month payment table with extra payments.

Mortgage Affordability Calculator

How much house can I afford?

Debt Payoff Planner

Snowball vs avalanche, side by side.

Tip & Bill Splitter

Split a bill with uneven shares.

Inflation Calculator

What money is worth in the future.

Compound Interest with Contributions

Growth over time with monthly deposits.

Salary Converter

Hourly ↔ daily ↔ weekly ↔ monthly ↔ yearly.

Percentage Calculator (All Modes)

X% of Y, % change, reverse percentages.

Age Calculator

Exact age in years, months, days + next birthday.

Calorie (TDEE) & Macro Calculator

Daily calories and protein/carb/fat split.

Pregnancy Due Date Calculator

Due date and how many weeks along.

Date Countdown

Days until any event, shareable link.

Business Days Calculator

Working days between dates, excluding weekends.

Time Duration Adder

Sum lists of hh:mm durations.

Word & Character Counter

Words, characters, sentences, reading time.

Text Case Converter

UPPER, lower, Title, camelCase, snake_case…

Text Diff Checker

Compare two texts line by line.

Image Resizer & Compressor

Resize and shrink JPG/PNG/WebP, nothing uploaded.

QR Code Generator

QR codes for links, Wi-Fi and contacts.

JSON Formatter & Validator

Pretty-print, minify and validate JSON.

Base64 & URL Encoder / Decoder

Encode and decode Base64 and URLs.

Regex Tester

Test regular expressions with live highlights.

UUID Generator

Bulk random v4 UUIDs.

Password Generator

Strong random passwords with strength meter.

ROAS & ROI Calculator

Are your ads profitable? ROAS, ROI, break-even.

CPM, CPC & CPA Calculator

All ad metrics from cost, impressions, clicks, sales.

Ad Budget Planner

Budget needed to hit a sales goal.

Customer Lifetime Value (LTV) & LTV:CAC

What a customer is worth vs what they cost.

A/B Test Significance Calculator

Is variant B really better? Plus sample size.

Email Marketing Metrics Calculator

Open, click, click-to-open, bounce rates.

UTM Link Builder

Campaign tracking links + QR code.

SEO Title & Meta Description Preview

See your Google snippet before it's cut off.

Social Post Length & Hashtag Checker

Character limits for X, Instagram, LinkedIn…

Open Graph & Social Card Preview

How your link looks when shared + meta tags.

Google Ads Headline & Description Counter

30/90 character limits with a live ad preview.

Keyword Match Type Wrapper

Broad, "phrase", [exact] and negatives in one go.

Max CPC & Quality Score Calculator

Highest bid you can afford + Quality Score effect.

Keyword Density Checker

Top words and how often your keyword appears.

URL Slug Generator

Clean, SEO-friendly URL slugs from any title.

Robots.txt Generator

Build a robots.txt with sitemap and AI-bot blocks.

FAQ Schema Generator

FAQPage JSON-LD structured data, ready to paste.

Social Engagement Rate Calculator

Engagement rate by followers or reach.

Social Media Image Size Guide

Every network's image sizes + crop preview.

Social Posting Schedule Planner

Spread posts evenly across a week.

Email Subject Line Checker

Length, spam words, caps and inbox preview.

Email List Growth & Churn Calculator

Monthly growth rate, churn and 12-month projection.

Conversion Funnel Calculator

Drop-off at every step of your funnel.

A/B Test Sample Size Calculator

Visitors and days needed before you start.

Break-even & Contribution Margin Calculator

Units and revenue needed to break even.

Marketing Budget Calculator

Budget as % of revenue, split by channel.

Net Promoter Score (NPS) Calculator

NPS from promoters, passives, detractors.

JSON ↔ CSV Converter

Turn JSON arrays into CSV and back.

JSON ↔ YAML Converter

Convert config files between JSON and YAML.

XML Formatter

Pretty-print or minify XML.

SQL Formatter

Make long SQL queries readable.

Hash Generator (MD5, SHA-256)

MD5, SHA-1, SHA-256 and SHA-512 hashes.

JWT Decoder

Read a JWT's header, payload and expiry.

HTML Entity Encoder / Decoder

Escape < > & " for HTML and back.

Number Base Converter

Binary, octal, decimal and hex.

Cron Expression Explainer

Cron in plain English + next run times.

Lorem Ipsum Generator

Placeholder paragraphs, sentences or words.

String Escape / Unescape

Escape text for JSON, JavaScript, HTML or URLs.

Unix Timestamp Converter

Epoch seconds ↔ readable dates.

Random String & Token Generator

Secure random strings, API keys and hex tokens.

Chmod Calculator

Unix file permissions: 755 ↔ rwxr-xr-x.

Color Converter & Contrast Checker

HEX, RGB, HSL + WCAG contrast.

CSS Unit Converter (px, rem, em, vw)

px ↔ rem ↔ em ↔ vw ↔ pt.

CSS Box Shadow & Gradient Generator

Design shadows and gradients, copy the CSS.

HTTP Status Code Lookup

What every HTTP status code means.

Credit Card Payoff Calculator

Months to debt-free and interest you'll pay.

Car Loan Calculator

Monthly payment with trade-in, tax and fees.

Loan Comparison Calculator

Compare two loan offers side by side.

Refinance Break-even Calculator

When refinancing pays for itself.

Rent vs Buy Calculator

Is buying or renting better over N years?

Mortgage Points Calculator

Is buying down your rate worth it?

Home Equity & LTV Calculator

Your equity, loan-to-value and how much you can borrow.

Savings Goal Calculator

How much to save each month to hit a target.

Retirement & FIRE Calculator

Your FIRE number and years to get there.

Dividend Yield & DRIP Calculator

Dividend income with reinvestment over time.

CAGR & Investment Return Calculator

Average yearly growth between two values.

Pay Raise Calculator

New salary from a % or amount raise.

Overtime Pay Calculator

Time-and-a-half and double-time pay.

Freelance Hourly Rate Calculator

What to charge to earn your target income.

Discount & Sale Price Calculator

Stacked discounts like 20% + 10% off.

Unit Price Comparison

Which pack size is the best deal?

Sales Tax & VAT Calculator

Add or remove sales tax / VAT from a price.

BMI Calculator with Healthy Weight Range

BMI plus the weight range that's healthy for your height.

Body Fat Calculator (US Navy Method)

Body fat % from a tape measure.

Ideal Weight Calculator

Ideal body weight by 4 classic formulas.

One Rep Max (1RM) Calculator

Your max lift from any set, plus % table.

Running Pace & Race Time Predictor

Pace per km/mile and predicted 5K–marathon times.

Heart Rate Zone Calculator

Training zones from age and resting HR.

Protein Intake Calculator

Daily protein grams for your goal.

Water Intake Calculator

How much water to drink a day.

Recipe Scaler

Resize any recipe to more or fewer servings.

Cups to Grams Cooking Converter

Cups, spoons and ml to grams by ingredient.

Caffeine Calculator

How much caffeine is still in your body.

Sleep Cycle Calculator

Best bedtime or wake-up time by sleep cycles.

Blood Alcohol (BAC) Calculator

Estimate blood alcohol and time to sober.

Steps to Distance & Calories

Turn steps into km, miles and calories.

Ovulation & Fertile Window Calculator

Fertile days and next period dates.

Baby Formula Feeding Calculator

Milk per feed by baby's weight.

Dog & Cat Age in Human Years

Pet age by species and dog size.

Your Life in Weeks

Every week of your life as a grid.

Birthday Facts: Weekday, Zodiac & Generation

What day you were born, star sign and more.

Date Calculator: Add or Subtract Days

Add or subtract days, weeks, months or years.

Days Between Dates

Days, weeks and months between two dates.

What Day of the Week Was It?

Weekday for any past or future date.

Week Number Calculator (ISO)

ISO week number of any date, and the dates of any week.

Day of the Year Calculator

Day number and how much of the year is gone.

Leap Year Checker

Is it a leap year? Plus the next ones.

Time Calculator: Add or Subtract Hours

What time it will be after X hours and minutes.

Timesheet Calculator with Breaks

Weekly hours, overtime and pay.

Decimal Hours Converter

7:45 ↔ 7.75 hours for payroll.

Military Time Converter

12-hour ↔ 24-hour military time.

Time Zone Converter

Convert a time between any two cities.

Meeting Planner Across Time Zones

Find hours that work in every city.

World Clock

Live time in cities around the world.

Online Stopwatch with Laps

Start, pause and record laps.

Countdown Timer with Alarm

Kitchen or study timer that beeps.

Pomodoro Timer

25-minute focus sessions with breaks.

Printable Calendar

Print any month or a whole year.

Working Hours in a Month

Work days and hours per month.

Easter & Holiday Date Finder

Easter, Thanksgiving and other moving dates.

Character Counter with Platform Limits

Characters vs. X, SMS, meta description limits.

Readability Score Checker

Flesch reading ease and grade level.

Reading & Speaking Time Calculator

How long text takes to read or say out loud.

Find and Replace Text

Replace words or patterns in bulk.

Remove Extra Spaces & Line Breaks

Clean up messy pasted text.

Sort Lines & Remove Duplicates

Sort A–Z, by number, shuffle, de-duplicate.

Add or Remove Line Numbers

Number every line, or strip numbers off.

Strip HTML or Markdown to Plain Text

Remove tags and formatting.

Reverse Text & Upside-Down Text

Backwards and flipped text.

Fancy Text Generator for Bios

Bold, italic, script and more Unicode styles.

Markdown to HTML Converter

Live preview and clean HTML output.

List to Comma Separated Converter

Turn lines into CSV, and back.

Image Converter (PNG, JPG, WebP)

Convert images between formats.

Image Compressor

Shrink image file size with a quality slider.

Image Cropper

Crop to exact pixels or aspect ratio.

Photo EXIF Viewer & Remover

See and remove camera and GPS details.

Merge PDF Files

Combine PDFs into one, in your browser.

Split PDF & Extract Pages

Pull out pages or split every page.

Images to PDF

Turn photos or scans into one PDF.

File Checksum Checker (SHA-256)

Verify a download hasn't been changed.

Password Strength Checker

How strong is your password, and how long to crack?

Passphrase Generator

Random, memorable word passwords.

Random PIN Generator

Secure PINs that skip 1234 and 0000.

Has My Password Been Leaked?

Check a password against known breaches, privately.

Encrypt & Decrypt Text with a Password

AES-256 encryption in your browser.

Secure Random Key & Token Generator

API keys, secrets and tokens.

RSA & ECDSA Key Pair Generator

Public/private keys in PEM format.

HMAC Generator

HMAC-SHA256 signatures in hex and Base64.

2FA Code Generator (TOTP)

Authenticator codes from a secret key.

2FA Setup QR Code Generator

Secret + QR code for authenticator apps.

Backup & Recovery Code Generator

One-time recovery codes for 2FA.

Suspicious Link Checker

Spot phishing and lookalike links without clicking.

Email Header Analyzer

SPF, DKIM, DMARC and delivery path.

Security Headers & CSP Generator

HSTS, CSP and more for Nginx, Apache, Netlify.

Text Redactor

Hide emails, phones and card numbers in text.

Credit Card Number Checker

Luhn check and card type, never stored.

Length Converter

Convert feet, inches, meters, km and miles.

Weight Converter

Convert pounds, ounces, kg, grams and stone.

Volume Converter

Convert cups, tablespoons, liters, gallons and more.

Area Converter

Convert square feet, square meters, acres and hectares.

Speed Converter

Convert mph, km/h, knots and m/s.

Temperature Converter

Celsius, Fahrenheit and Kelvin.

Cups to Grams Converter

Cups to grams for flour, sugar, butter and more.

Oven Temperature Converter

Gas mark, °C, fan °C and °F chart.

Shoe Size Converter

US, UK, EU and foot length.

Clothing Size Converter

US, UK and EU clothing sizes.

Ring Size Converter

Find your ring size from mm.

Data Size Converter (MB, GB, GiB)

Bytes, MB, GB, TB and GiB.

Download Time Calculator

How long will this file take?

Screen PPI Calculator

Pixel density from resolution and size.

Fraction Calculator

Add, subtract, multiply and divide fractions.

Ratio Calculator

Simplify and scale ratios.

Rounding Calculator

Decimal places, significant figures, nearest.

Scientific Notation Converter

Decimal ↔ scientific and engineering notation.

GCF & LCM Calculator

Greatest common factor and least common multiple.

Quadratic Equation Solver

Solve ax² + bx + c = 0.

System of Equations Solver (2×2)

Solve two equations with x and y.

Statistics Calculator

Mean, median, mode and standard deviation.

Probability Calculator

Chance of at least once, every time or exactly X.

Z-Score & Percentile Calculator

How unusual is a value?

Permutation & Combination Calculator

nPr and nCr.

Area & Volume Calculator

Rectangles, circles, cylinders, spheres and more.

Triangle Calculator

Angles and area from three sides.

Pythagorean Theorem Calculator

Find the missing side of a right triangle.

Ohm's Law Calculator

Voltage, current, resistance and power.

Density Calculator

Density, mass or volume.

Molar Mass Calculator

Molar mass from a chemical formula.

Half-Life Calculator

Radioactive decay and drug half-life.

Paint Calculator

Wall area, coats and liters of paint.

Tile Calculator

Tiles and boxes with cutting allowance.

Flooring Calculator

Flooring packs, spare material and cost.

Wallpaper Calculator

Rolls with pattern-repeat allowance.

Concrete Calculator

Slab volume, bags and delivery quantity.

Mulch & Gravel Calculator

Volume and weight from area and depth.

Appliance Electricity Cost

Daily, monthly and yearly running costs.

Solar Payback Calculator

Upfront cost, yearly savings and payback.

Room BTU Calculator

Estimate air-conditioner cooling capacity.

GPA Calculator

Credit-weighted GPA with editable points.

Final Grade Needed Calculator

Score needed on your final exam.

Weighted Grade Calculator

Weighted averages and completed weight.

APA & MLA Citation Maker

Book and webpage citations you can copy.

Flashcards

Create a deck and test yourself.

Study Pomodoro Timer

Focus sessions with short and long breaks.

Word & Page Estimator

Estimate pages from words and spacing.

Trip Fuel Cost Calculator

Fuel quantity and cost, including return trips.

MPG & L/100 km Converter

US MPG, UK MPG and liters per 100 km.

EV Charging Cost Calculator

Charge energy, cost and estimated time.

EV vs Gas Cost Calculator

Annual energy costs and price-premium payback.

Trip Cost Splitter

Split accommodation, transport and shared costs.

Tire Size Comparison

Diameter, sidewall and speedometer difference.

Jet Lag Planner

A gradual pre-trip sleep adjustment schedule.

Invoice Maker

Create a private invoice and download a PDF.

Profit Margin & Markup Calculator

Profit per unit, margin and markup side by side.

Business Break-even Calculator

Units and revenue needed to cover fixed costs.

Payroll Cost Calculator

Total employer cost including benefits and contributions.

Meeting Cost Timer

Track the running cost of a meeting.

Startup Runway Calculator

Months of cash remaining at your current net burn.

Dice Roller

Roll one or many dice with custom sides.

Coin Flip

Flip a fair coin and track heads and tails.

Wheel Spinner

Spin an equal-chance wheel for your own choices.

Random Name Picker

Pick a name, optionally removing it from the list.

Random Team Maker

Shuffle participants into balanced teams.

Scoreboard

Keep scores for two or more players.