# Wootils > Free, private, browser-based online tools. No signup required. Everything runs locally in your browser. ## Calculators - [Percentage Calculator](https://wootils.com/tools/percentage-calculator.html): Calculate percentages: X% of Y, what % is X of Y, increase/decrease - [BMI Calculator](https://wootils.com/tools/bmi-calculator.html): Calculate your Body Mass Index from height and weight - [Tip Calculator](https://wootils.com/tools/tip-calculator.html): Calculate tip amount and split the bill - [Loan Calculator](https://wootils.com/tools/loan-calculator.html): Calculate monthly mortgage or loan payments - [Age Calculator](https://wootils.com/tools/age-calculator.html): Calculate exact age from birthdate - [Countdown Timer](https://wootils.com/tools/countdown-timer.html): Set a countdown timer with quick presets - [Pomodoro Timer](https://wootils.com/tools/pomodoro-timer.html): Stay focused with the Pomodoro technique - [Aspect Ratio Calculator](https://wootils.com/tools/aspect-ratio-calculator.html): Calculate aspect ratios and resize proportionally - [Stripe Fee Calculator](https://wootils.com/tools/stripe-fee-calculator.html): Calculate Stripe processing fees accurately - [Compound Interest Calculator](https://wootils.com/tools/compound-interest-calculator.html): Calculate compound interest over time - [Discount Calculator](https://wootils.com/tools/discount-calculator.html): Calculate sale prices and savings - [Salary Calculator](https://wootils.com/tools/salary-calculator.html): Convert salary between hourly, monthly, and yearly - [VAT Calculator](https://wootils.com/tools/vat-calculator.html): Calculate VAT amounts and totals - [Stopwatch](https://wootils.com/tools/stopwatch.html): Precise stopwatch with lap times ## Converters - [Unit Converter](https://wootils.com/tools/unit-converter.html): Convert length, weight, and temperature - [Color Converter](https://wootils.com/tools/color-converter.html): Convert between HEX, RGB, and HSL with live preview - [Timestamp Converter](https://wootils.com/tools/timestamp-converter.html): Convert Unix timestamps to human dates and back - [Number Base Converter](https://wootils.com/tools/number-base-converter.html): Convert between Decimal, Binary, Hex, and Octal - [Currency Converter](https://wootils.com/tools/currency-converter.html): Convert between major world currencies - [SVG to PNG Converter](https://wootils.com/tools/svg-to-png.html): Convert SVG files to PNG images ## Text Tools - [Word Counter](https://wootils.com/tools/word-counter.html): Count words, characters, sentences, and paragraphs - [Case Converter](https://wootils.com/tools/case-converter.html): Convert text to UPPER, lower, Title, camelCase, snake_case - [Lorem Ipsum Generator](https://wootils.com/tools/lorem-ipsum.html): Generate placeholder text - [Text Diff](https://wootils.com/tools/text-diff.html): Compare two texts and highlight differences - [Markdown Preview](https://wootils.com/tools/markdown-preview.html): Live Markdown to HTML preview - [Unicode Lookup](https://wootils.com/tools/unicode-lookup.html): Browse and copy Unicode characters, symbols, and emoji - [Reading Time Estimator](https://wootils.com/tools/reading-time-estimator.html): Estimate reading and speaking time for your text - [Text to URL Slug](https://wootils.com/tools/text-to-slug.html): Convert text to clean, URL-friendly slugs - [Text to Speech](https://wootils.com/tools/text-to-speech.html): Convert text to speech using Web Speech API - [Text Comparison](https://wootils.com/tools/text-comparison.html): Compare two texts side by side - [Fancy Text Generator](https://wootils.com/tools/fancy-text-generator.html): Transform text into fancy Unicode styles (bold, italic, cursive, small caps, etc.) - [Text Repeater](https://wootils.com/tools/text-repeater.html): Repeat text multiple times with custom separator ## Developer Tools - [JSON Formatter](https://wootils.com/tools/json-formatter.html): Format, validate, and beautify JSON with syntax highlighting - [Base64 Encoder/Decoder](https://wootils.com/tools/base64-encoder.html): Encode and decode Base64 strings - [URL Encoder/Decoder](https://wootils.com/tools/url-encoder.html): Encode and decode URL components - [Hash Generator](https://wootils.com/tools/hash-generator.html): Generate MD5, SHA-1, SHA-256 hashes - [Regex Tester](https://wootils.com/tools/regex-tester.html): Test regular expressions with match highlighting - [CSS Gradient Generator](https://wootils.com/tools/css-gradient-generator.html): Create CSS gradients visually with live preview - [Meta Tag Generator](https://wootils.com/tools/meta-tag-generator.html): Generate SEO meta tags with Open Graph and Twitter Cards - [Cron Expression Parser](https://wootils.com/tools/cron-parser.html): Understand cron expressions in plain English - [Chmod Calculator](https://wootils.com/tools/chmod-calculator.html): Calculate Unix file permissions (chmod) - [IP Address Lookup](https://wootils.com/tools/ip-lookup.html): Find your IP address and geolocation info - [HTML to Markdown](https://wootils.com/tools/html-to-markdown.html): Convert HTML code to Markdown format - [CSS Minifier](https://wootils.com/tools/css-minifier.html): Minify CSS to reduce file size - [JavaScript Minifier](https://wootils.com/tools/js-minifier.html): Minify JavaScript to reduce file size - [SQL Formatter](https://wootils.com/tools/sql-formatter.html): Format and beautify SQL queries - [HTTP Status Codes](https://wootils.com/tools/http-status-codes.html): Complete HTTP status codes reference ## Generators - [Password Generator](https://wootils.com/tools/password-generator.html): Generate strong, random passwords - [UUID Generator](https://wootils.com/tools/uuid-generator.html): Generate UUID v4 identifiers in bulk - [QR Code Generator](https://wootils.com/tools/qr-code-generator.html): Generate QR codes from text or URLs - [Color Palette Generator](https://wootils.com/tools/color-palette-generator.html): Generate beautiful color palettes - [Favicon Generator](https://wootils.com/tools/favicon-generator.html): Create favicons from emoji, text, or images - [Invoice Generator](https://wootils.com/tools/invoice-generator.html): Create professional invoices as PDF - [Email Signature Generator](https://wootils.com/tools/email-signature-generator.html): Create professional email signatures - [Random Number Generator](https://wootils.com/tools/random-number-generator.html): Generate random numbers within any range - [Dice Roller](https://wootils.com/tools/dice-roller.html): Roll virtual dice — d4, d6, d8, d10, d12, d20 - [Coin Flip](https://wootils.com/tools/coin-flip.html): Flip a virtual coin — heads or tails ## Image Tools - [Image Resizer](https://wootils.com/tools/image-resizer.html): Resize images to any dimensions and download - [Image to Base64](https://wootils.com/tools/image-to-base64.html): Convert images to Base64 encoded strings - [Image Compressor](https://wootils.com/tools/image-compressor.html): Compress images to reduce file size - [Image Cropper](https://wootils.com/tools/image-cropper.html): Crop images by selecting an area - [Color Picker from Image](https://wootils.com/tools/color-picker-image.html): Upload an image and click to pick colors - [Mortgage Calculator](https://wootils.com/tools/mortgage-calculator.html): Calculate monthly mortgage payments, total interest, and amortization - [Calorie Calculator](https://wootils.com/tools/calorie-calculator.html): Calculate daily calorie needs based on age, weight, height, and activity - [Sleep Calculator](https://wootils.com/tools/sleep-calculator.html): Calculate optimal bedtime or wake-up time based on sleep cycles - [Body Fat Calculator](https://wootils.com/tools/body-fat-calculator.html): Estimate body fat percentage using the U.S. Navy method - [Profit Margin Calculator](https://wootils.com/tools/profit-margin-calculator.html): Calculate profit margin, markup, and gross profit - [Break-Even Calculator](https://wootils.com/tools/break-even-calculator.html): Calculate your break-even point in units and revenue - [Investment Calculator](https://wootils.com/tools/investment-calculator.html): Calculate future investment value with compound interest - [Whitespace Remover](https://wootils.com/tools/whitespace-remover.html): Remove extra whitespace, trailing spaces, and blank lines - [Binary to Text Converter](https://wootils.com/tools/binary-to-text.html): Convert binary code to text and text to binary - [Morse Code Translator](https://wootils.com/tools/morse-code-translator.html): Translate text to Morse code and back - [ROT13 Encoder/Decoder](https://wootils.com/tools/rot13-encoder.html): Encode and decode text using ROT13 cipher - [JWT Decoder](https://wootils.com/tools/jwt-decoder.html): Decode and inspect JSON Web Tokens header and payload - [YAML to JSON Converter](https://wootils.com/tools/yaml-to-json.html): Convert YAML to JSON and JSON to YAML - [XML to JSON Converter](https://wootils.com/tools/xml-to-json.html): Convert XML to JSON online - [Placeholder Image Generator](https://wootils.com/tools/placeholder-image-generator.html): Generate placeholder images with custom size and colors - [CSS Box Shadow Generator](https://wootils.com/tools/box-shadow-generator.html): Generate CSS box-shadow with live preview - [CSS Border Radius Preview](https://wootils.com/tools/border-radius-preview.html): Customize CSS border-radius with independent corner control - [Typing Speed Test](https://wootils.com/tools/typing-speed-test.html): Test your typing speed and accuracy in WPM - [Online Notepad](https://wootils.com/tools/notepad.html): Simple notepad with auto-save to browser storage - [Todo List](https://wootils.com/tools/todo-list.html): Simple todo list with local storage - [Income Tax Calculator](https://wootils.com/tools/tax-calculator.html): Calculate income tax for US, UK, Germany, and France - [Water Intake Calculator](https://wootils.com/tools/water-intake-calculator.html): Calculate daily water intake based on weight and activity - [Heart Rate Zones](https://wootils.com/tools/heart-rate-zones.html): Calculate heart rate training zones (Karvonen method) - [Pregnancy Due Date Calculator](https://wootils.com/tools/due-date-calculator.html): Estimate due date with trimester timeline - [Discount Calculator Pro](https://wootils.com/tools/discount-calculator-pro.html): Stack multiple discounts with tax calculation - [HTML Entity Encoder](https://wootils.com/tools/html-entity-encoder.html): Encode and decode HTML entities - [DNS Lookup](https://wootils.com/tools/dns-lookup.html): Query DNS records for any domain - [Regex Cheat Sheet](https://wootils.com/tools/regex-cheat-sheet.html): Complete regex reference with quick tester - [Flexbox Playground](https://wootils.com/tools/flexbox-playground.html): Experiment with CSS Flexbox visually - [CSS Grid Generator](https://wootils.com/tools/grid-generator.html): Build CSS Grid layouts visually - [Image to ASCII Art](https://wootils.com/tools/image-to-ascii.html): Convert images to ASCII art - [World Clock](https://wootils.com/tools/world-clock.html): Compare time across multiple time zones - [Screen Resolution Detector](https://wootils.com/tools/screen-resolution-detector.html): Detect screen and viewport details - [Browser Info](https://wootils.com/tools/browser-info.html): Detect browser, OS, and feature support - [Habit Tracker](https://wootils.com/tools/habit-tracker.html): Track daily habits with streaks - [Markdown to HTML](https://wootils.com/tools/markdown-to-html.html): Convert Markdown to clean HTML - [JSON to CSV](https://wootils.com/tools/json-to-csv.html): Convert JSON arrays to CSV format - [CSV to JSON](https://wootils.com/tools/csv-to-json.html): Convert CSV data to JSON - [Color Blindness Simulator](https://wootils.com/tools/color-blindness-simulator.html): Simulate color vision deficiency - [Font Pair Previewer](https://wootils.com/tools/font-pair-previewer.html): Preview Google Font pairings - [Word Frequency Counter](https://wootils.com/tools/word-frequency-counter.html): Analyze word frequency, keyword density, and unique word count - [Date Difference Calculator](https://wootils.com/tools/date-difference-calculator.html): Calculate days, weeks, months, and years between two dates - [XML Formatter](https://wootils.com/tools/xml-formatter.html): Format, beautify, and validate XML - [Electricity Cost Calculator](https://wootils.com/tools/electricity-cost-calculator.html): Calculate the electricity cost of running any appliance - [Barcode Generator](https://wootils.com/tools/barcode-generator.html): Generate barcodes in Code 128, EAN-13, UPC-A, and more - [Scientific Calculator](https://wootils.com/tools/scientific-calculator.html): Scientific calculator with trig, logs, exponents, and more - [GPA Calculator](https://wootils.com/tools/gpa-calculator.html): Calculate your Grade Point Average with grades and credit hours - [Fuel Cost Calculator](https://wootils.com/tools/fuel-cost-calculator.html): Calculate fuel costs for any trip with MPG or L/100km - [Binary Calculator](https://wootils.com/tools/binary-calculator.html): Perform binary arithmetic: add, subtract, multiply, AND, OR, XOR - [Roman Numeral Converter](https://wootils.com/tools/roman-numeral-converter.html): Convert between Roman numerals and decimal numbers - [Hex Color Picker](https://wootils.com/tools/hex-color-picker.html): Pick any color and get HEX, RGB, HSL values with tints and shades - [Text to Binary](https://wootils.com/tools/text-to-binary.html): Convert text to binary code and binary back to text - [Color Contrast Checker](https://wootils.com/tools/color-contrast-checker.html): Check WCAG 2.1 color contrast ratios for accessibility - [HTML Beautifier](https://wootils.com/tools/html-beautifier.html): Format and beautify HTML code with proper indentation - [Epoch Converter](https://wootils.com/tools/epoch-converter.html): Convert Unix epoch timestamps to dates and vice versa - [Speed Converter](https://wootils.com/tools/speed-converter.html): Convert between km/h, mph, m/s, knots, ft/s, and Mach - [Data Size Converter](https://wootils.com/tools/data-size-converter.html): Convert between Bytes, KB, MB, GB, TB, and PB - [PX to REM Converter](https://wootils.com/tools/pixel-to-rem-converter.html): Convert between px, rem, and em CSS units - [JSONPath Tester](https://wootils.com/tools/json-path-tester.html): Test JSONPath expressions against your JSON data in real-time - [CSS Animation Generator](https://wootils.com/tools/css-animation-generator.html): Create CSS animations visually with live preview - [HTML Table Generator](https://wootils.com/tools/html-table-generator.html): Create HTML tables visually and copy the code - [Crontab Generator](https://wootils.com/tools/crontab-generator.html): Build cron expressions visually with schedule preview - [Text to Hex Converter](https://wootils.com/tools/text-to-hex.html): Convert text to hexadecimal and hex to text - [Aspect Ratio Resizer](https://wootils.com/tools/aspect-ratio-resizer.html): Crop and resize images to specific aspect ratios - [JWT Generator](https://wootils.com/tools/jwt-generator.html): Generate JSON Web Tokens with custom payloads and HMAC signing - [IP Subnet Calculator](https://wootils.com/tools/ip-subnet-calculator.html): Calculate subnets, CIDR ranges, network and broadcast addresses - [Gradient Text Generator](https://wootils.com/tools/gradient-text-generator.html): Create CSS gradient text effects with live preview - [TOML Formatter](https://wootils.com/tools/toml-formatter.html): Format, validate, and convert TOML configuration files - [CSS Clip-Path Generator](https://wootils.com/tools/css-clip-path-generator.html): Create CSS clip-path shapes visually with live preview - [JSON Diff](https://wootils.com/tools/json-diff.html): Compare two JSON objects and see differences highlighted - [Emoji Picker](https://wootils.com/tools/emoji-picker.html): Search, browse, and copy emojis to clipboard instantly - [Color Name Finder](https://wootils.com/tools/color-name-finder.html): Find the closest CSS/HTML color name for any hex code - [.htaccess Generator](https://wootils.com/tools/htaccess-generator.html): Generate Apache .htaccess rules for redirects, caching, and security - [OG Image Preview](https://wootils.com/tools/og-image-preview.html): Preview how Open Graph meta tags look on social media - [ASCII Art Generator](https://wootils.com/tools/ascii-art-generator.html): Convert text to ASCII art with multiple font styles - [Timezone Converter](https://wootils.com/tools/timezone-converter.html): Convert time between different timezones worldwide - [Payroll Calculator](https://wootils.com/tools/payroll-calculator.html): Calculate net pay after taxes, deductions, and contributions - [Color Mixer](https://wootils.com/tools/color-mixer.html): Mix two colors together visually with different blending modes - [CSS Border Generator](https://wootils.com/tools/css-border-generator.html): Generate CSS border styles visually with live preview - [JSON Schema Validator](https://wootils.com/tools/json-schema-validator.html): Validate JSON data against a JSON Schema definition - [Pixel Art Editor](https://wootils.com/tools/pixel-art-editor.html): Create pixel art with drawing tools and export as PNG - [Markdown Table Generator](https://wootils.com/tools/markdown-table-generator.html): Generate markdown tables visually with alignment options - [Word Scrambler](https://wootils.com/tools/word-scrambler.html): Scramble words or find anagrams from letters - [Placeholder Image URLs](https://wootils.com/tools/lorem-picsum.html): Generate Lorem Picsum placeholder image URLs with custom dimensions - [Unit Price Calculator](https://wootils.com/tools/unit-price-calculator.html): Compare prices per unit for smarter shopping - [Color Shades Generator](https://wootils.com/tools/color-shades-generator.html): Generate tints and shades of any color - [Text to ASCII Table](https://wootils.com/tools/text-to-ascii-table.html): Show ASCII/Unicode decimal, hex, octal, and binary values for each character - [Retirement Savings Calculator](https://wootils.com/tools/retirement-calculator.html): Calculate how much to save for retirement with projections - [JSON to XML Converter](https://wootils.com/tools/json-to-xml.html): Convert JSON data to well-formed XML format instantly - [Number to Words](https://wootils.com/tools/number-to-words.html): Convert any number to its written English form with currency format - [Line Counter](https://wootils.com/tools/line-counter.html): Count total, blank, non-empty, and unique lines in text - [NATO Phonetic Alphabet](https://wootils.com/tools/text-to-nato.html): Convert text to NATO phonetic alphabet (Alpha, Bravo, Charlie) - [IP Address Generator](https://wootils.com/tools/ip-address-generator.html): Generate random IPv4 and IPv6 addresses for testing - [Color Temperature Converter](https://wootils.com/tools/color-temperature-converter.html): Convert Kelvin color temperature to RGB with live preview