Smart Tools forSmarter Decisions.
Calculators, converters, and interactive tools for finance, tech, and everyday life. Fast, beautiful, and always free.
Featured
Popular tools to get you started.
Split Bill Calculator
Free online bill splitter to divide restaurant checks, receipts, tax & tip among friends. Even split or itemized per person with 30+ currencies.
Try it50/30/20 Budget Calculator
Split your income into needs, wants, and savings with customizable percentages. Visual breakdowns, weekly and annual projections, and shareable budget plans.
Try it401k Compound Interest Calculator
See how compound interest grows your savings with employer matching, annual raises, and regular contributions. Year-by-year projections and retirement income estimates.
Try itMortgage Payment Calculator
Calculate your monthly mortgage payment with full amortization schedule. See principal, interest, tax, and insurance breakdown with visual charts.
Try itRent vs Buy Calculator
Compare the true cost of renting vs buying a home over time. Side-by-side net worth projections, break-even analysis, and monthly cost breakdowns with investment opportunity cost.
Try itDebt Payoff Calculator
Compare snowball vs avalanche debt payoff strategies side-by-side. Enter multiple debts to see payoff timelines, total interest, and how extra payments accelerate your debt-free date.
Try itProfit Margin Calculator
Calculate gross margin, markup, and profit per unit with visual breakdowns. Includes break-even analysis, volume scaling, and a margin vs markup reference table.
Try itAuto Loan Calculator
Estimate your monthly car payment, compare loan terms side-by-side, and see how extra payments save you thousands. Full amortization schedule and early payoff analysis.
Try itSalary to Hourly Calculator
Convert annual salary to hourly rate or hourly pay to annual salary. Accounts for PTO, paid holidays, overtime, and shows daily, weekly, and monthly breakdowns.
Try itRefinance Calculator
Should you refinance? Compare your current loan vs new terms side-by-side. See break-even month, monthly savings, and lifetime cost difference for mortgage or auto loans.
Try itBuy vs Lease Calculator
Compare the true cost of buying vs leasing a car over time. Year-by-year cost analysis with depreciation, equity buildup, and total cost of ownership.
Try itFreelance Rate Calculator
Find your ideal freelance hourly rate. Factors in self-employment tax, health insurance, retirement, expenses, and billable hours to match your desired take-home pay.
Try itHome Affordability Calculator
How much house can you afford? Uses the 28/36 DTI rule with your income, debts, and down payment. Includes rate sensitivity analysis and PITI payment breakdown.
Try itSide Hustle Profit Simulator
Simulate your side hustle profits with a 12-month projection. See break-even month, tax estimates, growth modeling, and effective hourly rate with shareable results.
Try itAirbnb Profit Estimator
Estimate your Airbnb rental profits with detailed expense tracking, occupancy modeling, cleaning cost analysis, and cash-on-cash ROI for short-term rentals.
Try itRental Property ROI Calculator
Analyze rental property investments with cash flow, cap rate, cash-on-cash return, expense breakdown, and 30-year ROI projections including appreciation and equity.
Try itDividend Reinvestment Simulator
Simulate how dividend reinvestment (DRIP) compounds your portfolio. Track yield on cost, compare DRIP vs cash, and project future dividend income over time.
Try itAll Tools
Every calculator, one click away.
Split Bill Calculator
Free online bill splitter to divide restaurant checks, receipts, tax & tip among friends. Even split or itemized per person with 30+ currencies.
50/30/20 Budget Calculator
Split your income into needs, wants, and savings with customizable percentages. Visual breakdowns, weekly and annual projections, and shareable budget plans.
401k Compound Interest Calculator
See how compound interest grows your savings with employer matching, annual raises, and regular contributions. Year-by-year projections and retirement income estimates.
Mortgage Payment Calculator
Calculate your monthly mortgage payment with full amortization schedule. See principal, interest, tax, and insurance breakdown with visual charts.
Rent vs Buy Calculator
Compare the true cost of renting vs buying a home over time. Side-by-side net worth projections, break-even analysis, and monthly cost breakdowns with investment opportunity cost.
Debt Payoff Calculator
Compare snowball vs avalanche debt payoff strategies side-by-side. Enter multiple debts to see payoff timelines, total interest, and how extra payments accelerate your debt-free date.
Profit Margin Calculator
Calculate gross margin, markup, and profit per unit with visual breakdowns. Includes break-even analysis, volume scaling, and a margin vs markup reference table.
Auto Loan Calculator
Estimate your monthly car payment, compare loan terms side-by-side, and see how extra payments save you thousands. Full amortization schedule and early payoff analysis.
Salary to Hourly Calculator
Convert annual salary to hourly rate or hourly pay to annual salary. Accounts for PTO, paid holidays, overtime, and shows daily, weekly, and monthly breakdowns.
Refinance Calculator
Should you refinance? Compare your current loan vs new terms side-by-side. See break-even month, monthly savings, and lifetime cost difference for mortgage or auto loans.
Buy vs Lease Calculator
Compare the true cost of buying vs leasing a car over time. Year-by-year cost analysis with depreciation, equity buildup, and total cost of ownership.
Freelance Rate Calculator
Find your ideal freelance hourly rate. Factors in self-employment tax, health insurance, retirement, expenses, and billable hours to match your desired take-home pay.
Home Affordability Calculator
How much house can you afford? Uses the 28/36 DTI rule with your income, debts, and down payment. Includes rate sensitivity analysis and PITI payment breakdown.
Net Worth Calculator
Calculate your net worth by adding up assets and subtracting liabilities. Visual balance sheet breakdown, milestone badges, and shareable results to track your wealth.
Subscription Tracker
Add all your subscriptions and see monthly/yearly totals with a stacked bar showing where your money goes. Quick-add popular services and track spending by category.
Investment Return Calculator
Compare lump sum vs dollar cost averaging with adjustable return rates and inflation toggle. Growth curve visualization and year-by-year breakdown.
Percentage Calculator
Three calculators in one: "What is X% of Y?", "X is what % of Y?", and "% change from X to Y." Step-by-step formula breakdowns with visual bars.
Unit Converter
Convert length, weight, volume, and temperature instantly. Two-way conversion with visual comparison bars, common quick-reference conversions, and all-units table.
Age Calculator
Enter your birthdate and see exact age in years, months, days, and hours. Plus fun facts like heartbeats, breaths, zodiac sign, and next milestone birthday.
Due Date Calculator
Enter your last period or conception date to get your estimated due date. Trimester timeline visualization with key milestones and week-by-week progress.
Macro Calculator
Calculate daily calories and protein/carbs/fat breakdown based on your age, weight, height, activity level, and goals. Visual pie chart with meal-by-meal suggestions.
Date Difference Calculator
Calculate the exact time between two dates in years, months, weeks, days, hours, and minutes. Perfect for event planning, milestone tracking, and countdowns.
Time Zone Converter
Convert time between time zones instantly. Schedule international meetings and coordinate remote teams with visual time zone comparison.
Sleep Calculator
Calculate optimal sleep and wake times based on 90-minute sleep cycles. Wake up refreshed by timing your alarm to natural sleep rhythms.
Water Intake Calculator
Calculate your daily water intake needs based on weight, activity level, and climate. Get personalized hydration goals with visual tracking.
Currency Converter
Convert between 22+ world currencies instantly with exchange rates. USD, EUR, GBP, JPY and more with popular pairs and quick reference.
Time Converter
Convert time units from nanoseconds to centuries. Includes duration breakdown and common conversions for seconds, minutes, hours, days, and more.
Speed Converter
Convert speed units: mph to km/h, knots, m/s, Mach, and more. Includes common speed references from walking to supersonic flight.
Data Storage Converter
Convert data storage units: bytes, KB, MB, GB, TB. Includes binary (KiB, GiB) and bits. Common storage sizes for files and devices.
Savings Goal Calculator
Calculate how much to save monthly to reach your financial goal. See compound interest growth, timeline projections, and year-by-year breakdown to plan your savings.
Emergency Fund Calculator
Determine your ideal emergency fund size based on monthly expenses and risk factors. Get personalized recommendations with progress tracking and milestone badges.
Loan Payoff Calculator
Calculate how long to pay off any loan and total interest. See the dramatic impact of extra payments with side-by-side comparison and savings breakdown.
Tax Bracket Calculator
Calculate your 2026 federal income tax bracket and effective tax rate. See total tax owed, marginal vs effective rate, and tax breakdown by bracket with visual charts.
Retirement Savings Calculator
Calculate how much you need to save for retirement with year-by-year projections. Factor in current age, savings, contributions, returns, and inflation to reach your retirement goals.
Credit Card Payoff Calculator
Calculate how long to pay off credit card debt and total interest paid. Compare minimum payments vs fixed monthly payments to see how extra payments save money.
ROI Calculator
Calculate return on investment (ROI) for any investment or business decision. See ROI percentage, net profit, and annualized returns with visual breakdowns.
Break-Even Analysis Calculator
Calculate your break-even point in units and revenue. Determine how many sales needed to cover fixed and variable costs with visual profitability charts.
Hourly to Salary Calculator
Convert hourly wage to annual salary or vice versa. Calculate daily, weekly, and monthly earnings with overtime, paid time off, and benefits included.
Down Payment Calculator
Plan your home purchase by comparing 5%, 10%, 15%, and 20% down payment scenarios. Estimate PMI costs and see how long it takes to save your target amount.
Rent Affordability Calculator
Calculate how much rent you can afford using the 30% rule. Get personalized recommendations based on your income, expenses, and budget with multiple percentage scenarios.
Inflation Calculator
See how inflation erodes your purchasing power over time. Calculate future money values, compare equivalent amounts across years, and understand real investment returns.
Student Loan Payoff Calculator
Calculate your student loan payoff timeline and total interest. See how extra payments accelerate your debt-free date and save thousands in interest charges.
CD Calculator
Calculate certificate of deposit returns with different terms, rates, and compounding frequencies. Compare CD terms side-by-side to maximize your savings.
401k Withdrawal Calculator
Calculate taxes and penalties for early 401k withdrawal. See what you will actually receive after federal tax, state tax, and early withdrawal penalties with opportunity cost analysis.
Paycheck Calculator
Estimate your take-home pay after federal taxes, state taxes, Social Security, Medicare, and pre-tax deductions. Uses 2024 tax brackets for accurate results.
FIRE Calculator
Calculate when you can achieve Financial Independence and Retire Early. See your FIRE number, years to FI, and detailed projections using the 4% rule with multiple scenarios.
Stock Portfolio Calculator
Analyze your investment portfolio allocation, calculate expected returns, track diversification, and get rebalancing recommendations. Optimize your asset mix for long-term growth.
Personal Loan Calculator
Calculate monthly payments, total interest, and compare different loan terms for personal loans. See how loan amount, APR, and term length affect your payment.
Amortization Schedule Calculator
Generate a detailed loan amortization schedule showing principal, interest, and remaining balance for each payment. See exactly how your loan will be paid off over time.
Lease Payment Calculator
Calculate monthly car lease payments using MSRP, residual value, money factor, and down payment. Compare lease vs buy options and understand lease terms.
Side Hustle Profit Simulator
Simulate your side hustle profits with a 12-month projection. See break-even month, tax estimates, growth modeling, and effective hourly rate with shareable results.
Airbnb Profit Estimator
Estimate your Airbnb rental profits with detailed expense tracking, occupancy modeling, cleaning cost analysis, and cash-on-cash ROI for short-term rentals.
Rental Property ROI Calculator
Analyze rental property investments with cash flow, cap rate, cash-on-cash return, expense breakdown, and 30-year ROI projections including appreciation and equity.
Dividend Reinvestment Simulator
Simulate how dividend reinvestment (DRIP) compounds your portfolio. Track yield on cost, compare DRIP vs cash, and project future dividend income over time.
Tools
Free online tools.
JSON Formatter & Validator
Format, validate, and minify JSON data instantly. Free online tool with error detection, indentation options, and one-click copy.
Base64 Encode & Decode
Encode text to Base64 or decode Base64 strings back to plain text. Supports Unicode, real-time conversion, and copy-to-clipboard.
URL Encode & Decode
Encode and decode URLs and query parameters instantly. Supports encodeURIComponent and encodeURI modes with percent-encoding.
Hash Generator
Generate SHA-256, SHA-384, SHA-512, and SHA-1 hashes from text instantly. Secure client-side hashing with copy-to-clipboard.
UUID Generator
Generate random UUID v4 identifiers instantly. Create single or bulk UUIDs, copy to clipboard, and customize the output format.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text for web design and development. Create paragraphs, sentences, or words with customizable length.
PDF Tools Suite
All-in-one PDF toolkit: merge multiple PDFs, extract specific pages, or remove unwanted pages. Visual page previews, drag-to-reorder. 100% in-browser.
PDF eSign
Sign PDF documents for free in your browser. Draw, type, or upload your signature, place it anywhere on any page, and export the signed PDF. 100% client-side.
Regex Tester
Test and debug regular expressions in real-time with instant match highlighting, capture group extraction, find-and-replace, and preset patterns.
Color Picker & Converter
Pick colors, convert between HEX, RGB, and HSL formats. Generate color harmonies, shades, tints, and check WCAG contrast ratios.
Diff Checker
Compare two texts side-by-side and find differences instantly. Split and unified views with inline word-level highlighting.
JWT Decoder
Decode and inspect JSON Web Tokens instantly. View header, payload, claims, and expiration status. 100% client-side.
Markdown Preview
Write and preview Markdown in real-time with split, edit, and preview modes. Supports headings, lists, code blocks, tables, and more.
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time instantly. Includes word frequency analysis.
Case Converter
Convert text between lowercase, UPPERCASE, Title Case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and more.
Password Generator
Generate cryptographically secure passwords with customizable length, character types, visual strength meter, and entropy calculation.
QR Code Generator
Create custom QR codes for URLs, text, email, phone, and Wi-Fi credentials. Download as PNG with custom colors and sizes.
Pomodoro Timer
Stay focused with customizable work/break intervals, audio notifications, session tracking, and daily productivity stats.
CSS Box Shadow Generator
Design beautiful CSS box shadows with a visual editor. Multiple layers, presets, live preview, and one-click copy for CSS and Tailwind.
Unix Timestamp Converter
Convert Unix timestamps to dates and vice versa. Live clock, ISO 8601, relative time, day of year, and week number.
Cron Expression Generator
Build and test cron expressions visually. See human-readable descriptions, next run times, and use quick presets for common schedules.
JSON to TypeScript Converter
Convert JSON to TypeScript interfaces instantly. Generate type-safe interfaces and type definitions from any JSON data with customizable options.
CSS Gradient Generator
Create beautiful CSS gradients with a live visual editor. Build linear, radial, and conic gradients with custom color stops, presets, and one-click CSS code copy.
SQL Formatter & Beautifier
Format, beautify, and minify SQL queries instantly. Customizable keyword casing, indentation, and comma placement. Supports MySQL, PostgreSQL, and more.
CSV to JSON Converter
Convert CSV to JSON and JSON to CSV instantly with automatic delimiter detection, data preview, and downloadable output.
HTML Formatter & Beautifier
Format, beautify, and minify HTML code instantly with customizable indentation, syntax validation, and one-click copy.
Image Compressor & Optimizer
Compress and optimize images with quality control, format conversion (JPG/PNG/WebP), before/after comparison, and batch processing.
XML Formatter & Validator
Format, validate, and minify XML documents instantly with syntax highlighting, error detection, and tree view visualization.
YAML Formatter & Validator
Format, validate, and convert YAML to JSON or vice versa. Perfect for DevOps engineers working with Kubernetes, Docker Compose, and CI/CD pipelines.
Base64 Image Encoder & Decoder
Convert images to Base64 data URLs and decode Base64 back to images. Supports PNG, JPG, WebP, GIF with live preview and size comparison.
Code Minifier
Minify JavaScript, CSS, and HTML code to reduce file size and improve performance. Visual size reduction stats and instant optimization.
Environment Variable Manager
Create, edit, format, and validate .env files with syntax validation. Convert between .env and JSON formats with sorting and analysis.
Gzip Compress & Decompress
Compress and decompress text using gzip, deflate, or raw compression algorithms. Base64 encoding with compression ratio visualization and size comparison.
JWT Encoder
Create and sign JSON Web Tokens with HS256, HS384, or HS512 algorithms. Customize header and payload with real-time encoding and signature generation.
Text Statistics Analyzer
Analyze text with detailed statistics, word frequency charts, readability scores (Flesch Reading Ease, Flesch-Kincaid), and keyword density analysis.
URL Slug Generator
Generate clean, SEO-friendly URL slugs from any text. Automatically converts titles to URL-safe slugs with customizable separators, case, and character handling.
Markdown to HTML Converter
Convert Markdown to HTML instantly with live preview. Supports GitHub Flavored Markdown, code syntax highlighting, tables, and more.
HTTP Status Code Checker
Comprehensive HTTP status code reference guide with search. Look up 1xx, 2xx, 3xx, 4xx, and 5xx status codes with descriptions and use cases.
Color Contrast Checker
Check color contrast ratios for WCAG AA and AAA accessibility compliance. Ensure your text and UI elements meet web accessibility standards.
API Response Formatter
Format and beautify API responses in JSON, XML, or HTML with auto-detection. Real-time formatting with response statistics and analysis.
Byte Converter
Convert between bytes, KB, MB, GB, TB, and PB instantly. Supports both binary (1024) and decimal (1000) conversion modes.
MIME Type Lookup
Comprehensive MIME type reference with 50+ file types. Search by extension or MIME type with instant filtering and category browsing.
Escape & Unescape String
Escape and unescape strings for JavaScript, HTML, URL encoding, and Unicode. Real-time conversion with bidirectional support.
Mock Data Generator
Generate realistic fake data for testing and development. Build custom schemas with 25+ field types and export as JSON, CSV, or TypeScript.
Open Graph Preview
Preview how your website looks when shared on Facebook, Twitter/X, LinkedIn, Slack, and Discord. Generate Open Graph meta tags instantly.
JavaScript Keycode Finder
Press any key to instantly see its JavaScript event properties: event.key, event.code, keyCode, location, and modifier states. Free keycode lookup tool for developers.
Chmod Calculator
Interactive chmod permission calculator. Convert between numeric (octal) and symbolic Unix file permissions with SUID, SGID, and sticky bit support.
CSS Flexbox Playground
Visual CSS Flexbox editor with live preview. Experiment with flex-direction, justify-content, align-items, and more. Copy CSS or Tailwind classes.
ASCII Art Text Generator
Convert text to large ASCII art banners with 5 font styles. Perfect for CLI banners, code comments, README headers, and commit messages.
Placeholder Image Generator
Generate custom placeholder images with configurable dimensions, colors, text, and patterns. Download as PNG or SVG, copy as data URL.
Subnet Calculator
Calculate IPv4 subnets with CIDR notation. Get network address, broadcast, host range, wildcard mask, and binary visualization.
CSS Grid Generator
Visual CSS Grid layout builder with live preview. Define columns, rows, gaps, and item placement. Generate CSS or Tailwind code with presets.
CSS Animation Generator
Visual CSS animation editor with keyframe builder and live preview. Customize timing, transforms, and easing. Generate and copy CSS code instantly.
HTML to Markdown Converter
Convert HTML to Markdown format instantly with live preview. Supports tables, lists, code blocks, links, images, and more. Free online HTML to Markdown converter.
IP Address Converter
Convert IPv4 addresses between binary, decimal, and hexadecimal formats. Calculate network ranges, subnet masks, and visualize IP structure with CIDR support.
Color Palette Extractor from Images
Extract dominant color palettes from images instantly. Upload any image and get HEX, RGB, and HSL values for the main colors. Perfect for designers and developers.
SVG Optimizer
Optimize SVG files by removing unnecessary data, whitespace, and metadata. Reduce file size while maintaining visual quality. Safe and aggressive modes available.
HTML Entity Converter
Convert special characters to HTML entities and decode entities back to characters. Supports named entities (&, <) and numeric codes. Bi-directional conversion.
WebSocket Tester
Test WebSocket connections in real-time. Connect to ws:// and wss:// servers, send messages, view responses with timestamps, and debug WebSocket protocols.
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