Correctly counts the number of r's in "strawberry"
Tools that just work
Calculators, generators, converters, and developer tools.
Fast, private, and no sign-up required.
Generators
Generate passwords, QR codes, UUIDs, lorem ipsum text and more.
11 tools →Text Tools
Count words, convert case, compare text, and manipulate strings.
13 tools →Developer Tools
Format JSON, encode Base64, decode URLs, test regex patterns and more.
16 tools →Calculators
Calculate percentages, age, discounts, tips, BMI and more.
23 tools →Converters
Convert colors, units, timestamps, and data formats.
14 tools →Image Tools
Resize, compress, convert, and pick colors from images.
9 tools →Health & Fitness
Calculate TDEE, calories, macros, body fat, and more for your health goals.
6 tools →Finance Tools
Loan calculators, tax estimators, investment returns, and budgeting tools.
8 tools →Generators
Credit Card Validator
Validate credit card numbers using the Luhn algorithm. Detect Visa, Mastercard, Amex, and more card types instantly.
Cron Expression Builder
Build and validate cron expressions visually. See human-readable descriptions and next execution times for any cron schedule.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text instantly. Free online hash calculator with copy support.
Htaccess Generator
Generate .htaccess rules for redirects, HTTPS, caching, GZIP compression, error pages, and more. Copy or download instantly.
IBAN Validator
Validate International Bank Account Numbers (IBAN) with checksum verification. Detect country, check digits, and BBAN.
Invoice Generator
Create professional invoices with line items, tax, discounts, and currency options. Preview and print or save as PDF instantly.
Lorem Ipsum Generator
Generate placeholder lorem ipsum text for your designs and layouts. Choose paragraph count and copy with one click.
Password Generator
Generate strong, random passwords with customizable length and character options. Create secure passwords instantly in your browser.
Text Tools
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and more with one click.
Character Counter
Count characters in your text with and without spaces. Set an optional limit to track usage against platform maximums.
Emoji Copy & Paste
Browse, search, and copy 200+ emojis organized by category. Click any emoji to copy it to your clipboard instantly.
Fancy Text Generator
Generate stylish Unicode text with bold, italic, cursive, monospace, and 15+ fancy font styles. Copy and paste anywhere.
Find and Replace
Find and replace text with support for case-sensitive, whole-word, and regex matching. See match counts instantly.
Readability Score Calculator
Calculate Flesch Reading Ease and Flesch-Kincaid Grade Level scores. See if your writing matches your target audience.
Remove Duplicate Lines
Remove duplicate lines from your text instantly. Options for case sensitivity and whitespace trimming with one-click copy.
Slug Generator
Generate clean, SEO-friendly URL slugs from any text. Handles special characters, accents, and custom separators instantly.
Developer Tools
ASCII Table
Complete ASCII table showing decimal, hex, octal, binary, and character codes for all 128 values. Searchable, filterable, click to copy.
Base64 Encode/Decode
Encode text to Base64 or decode Base64 strings instantly. Supports UTF-8 text with auto-detection and one-click copy.
Color Contrast Checker
Check color contrast ratios against WCAG 2.1 standards. See pass/fail results for AA and AAA levels with live preview and suggestions.
CSS Minifier & Beautifier
Minify CSS to reduce file size or beautify compressed CSS for readability. Shows original size, minified size, and savings percentage.
HTML Entity Encode/Decode
Convert special characters to HTML entities and back. Encode text for safe HTML embedding or decode entity references instantly.
HTML Prettifier & Minifier
Format messy HTML with proper indentation or minify it to reduce size. Supports 2-space, 4-space, and tab indentation options.
JSON Formatter & Validator
Format, minify, and validate JSON data online. Pretty-print with customizable indentation, syntax highlighting, and instant error detection.
JSON to CSV Converter
Convert JSON arrays to CSV format and back. Auto-detect columns, flatten nested objects, preview as a table, and download as a .csv file.
Calculators
Age Calculator
Calculate your exact age in years, months, and days from your date of birth. See total days lived and next birthday countdown.
Aspect Ratio Calculator
Calculate aspect ratios from width and height. Resize dimensions proportionally with common presets and a visual preview.
Average Calculator
Calculate mean, median, mode, range, and more for any number set. Includes weighted average mode and a visual distribution of your data.
BMI Calculator
Calculate your Body Mass Index with metric or imperial units. See your BMI category and where you fall on the visual scale.
Compound Interest Calculator
Calculate compound interest with optional monthly contributions. See year-by-year growth, total interest earned, and final balance.
Countdown Timer
Set a countdown timer with hours, minutes, and seconds. Quick presets, progress bar, and audio alert when time is up.
Date Difference Calculator
Calculate the exact difference between two dates in years, months, days, weeks, hours, and minutes. Add or subtract days from any date.
Discount Calculator
Calculate sale prices, savings, and final cost after single or stacked discounts with optional tax. Free and instant.
Converters
Air Fryer Converter
Convert oven temperatures and cook times to air fryer settings. Includes a quick reference table for popular foods.
Binary to Decimal Converter
Convert between binary and decimal numbers instantly. Also shows octal and hexadecimal values with step-by-step conversion explanations.
CM to Inches Converter
Convert centimeters to inches and inches to centimeters instantly. Real-time bidirectional conversion with a handy reference table and formula display.
Color Converter
Convert colors between HEX, RGB, and HSL formats instantly. Live preview swatch, input validation, and one-click copy for each format.
Hex to Decimal Converter
Convert hexadecimal to decimal and decimal to hexadecimal instantly. Also displays the binary equivalent. Supports 0x prefix input.
KG to LBS Converter
Convert kilograms to pounds and pounds to kilograms instantly. Bidirectional real-time conversion with a reference table and formula breakdown.
KM to Miles Converter
Convert kilometers to miles and miles to kilometers instantly. Also shows nautical miles, the conversion formula, and a reference table.
Length Converter
Convert lengths between metric and imperial units including mm, cm, m, km, inches, feet, yards, and miles. Instant results with swap support.
Image Tools
Color Palette Generator
Generate harmonious 5-color palettes with random, analogous, complementary, triadic, and monochromatic modes. Copy HEX, RGB, or HSL values.
Color Picker
Pick any color and get its HEX, RGB, and HSL values. Adjust brightness, save a color history, and copy values with one click.
Favicon Generator
Generate favicons from an image or custom text and emoji. Preview at multiple sizes and download individual PNGs for your website.
Image Compressor
Compress images online by adjusting quality. See file size savings instantly with before/after preview. Download optimized images.
Image Resizer
Resize images to exact dimensions in your browser. Lock aspect ratio, preview results, and download in PNG, JPEG, or WebP format.
Image to Base64
Convert any image to a Base64 encoded data URL string. Copy the result for use in CSS, HTML, or JSON. Runs entirely in your browser.
Image to PDF Converter
Convert multiple images to a PDF document. Reorder pages, choose page size and orientation, then print to PDF entirely in your browser.
JPG to PNG Converter
Convert JPG images to PNG format instantly in your browser. Batch support, before/after preview, and free download. No upload needed.
Health & Fitness
Body Fat Calculator
Estimate your body fat percentage using the US Navy method with neck, waist, and hip measurements. See your category and lean body mass.
Calorie Calculator
Calculate daily calorie needs for weight loss, maintenance, or gain. See personalized targets based on your age, gender, and activity level.
Macro Calculator
Calculate your daily protein, carbs, and fat targets based on your body stats, activity level, and fitness goal with multiple diet options.
Pregnancy Due Date Calculator
Estimate your baby's due date from your last menstrual period or conception date. See your current week, trimester, and key pregnancy milestones.
TDEE Calculator
Calculate your Total Daily Energy Expenditure based on age, gender, height, weight, and activity level using the Mifflin-St Jeor equation.
Water Intake Calculator
Calculate your recommended daily water intake based on weight, activity level, and climate. See results in liters and glasses.
Finance Tools
Fuel Cost Calculator
Calculate fuel costs for any trip based on distance, fuel efficiency, and gas price. Supports miles/km, multi-trip comparison, and round trips.
Investment Return Calculator
Calculate investment growth with monthly contributions, compound interest, and inflation adjustment. See year-by-year returns and total ROI.
Loan Calculator
Calculate monthly loan payments, total interest, and view a full amortization schedule. Supports different loan terms and compounding options.
Mortgage Affordability Calculator
Find out how much house you can afford based on your income, debts, and down payment. Uses the 28/36 DTI rule for accurate results.
Net Worth Calculator
Calculate your net worth by tracking assets and liabilities. Add custom items, see totals, and get a visual breakdown of your finances.
Savings Goal Calculator
Find out how long it takes to reach your savings goal or how much to save monthly. Includes progress tracking and milestone markers.
UK Income Tax Calculator
Estimate your UK income tax, National Insurance contributions, and take-home pay using 2024/25 PAYE tax bands and NI rates.
US Income Tax Calculator
Estimate your federal income tax, effective tax rate, and take-home pay based on your filing status and gross income using 2024 tax brackets.