Free Online Tools That Respect Your Privacy

100+ browser-based calculators, converters, and developer tools. No tracking. No sign-ups. No limits. Your data never leaves your device.

100% Client-Side

No Data Collection

Instant Results

Unlimited Use

Browse All Tools How We Protect You

Most Visited Tools

Our most popular free tools, used by millions every month

Income Tax Calculator

Compound Interest Calculator

Salary to Hourly Calculator

Convert annual pay to hourly wage with overtime & PTO

Investment Return Calculator

ROI, CAGR & total gain for stocks, bonds & real estate

ROI Calculator

Return on investment for marketing, real estate & projects

Profit Margin Calculator

Gross, operating & net margin with markup conversion

Break-Even Calculator

Units & revenue needed to cover fixed and variable costs

BMI Calculator

Body Mass Index with health ranges & recommendations

Macro Calculator

Protein, carbs & fat targets based on your goals

Body Fat Calculator

Body fat percentage with Navy method & health ranges

Percentage Calculator

Find X% of Y, percentage change & more

Age Calculator

Exact age in years, months, days & upcoming milestones

Time Zone Converter

Convert times across time zones worldwide

Coming Soon

TDEE / Calorie Calculator

Total daily energy expenditure & calorie targets

Date Difference Calculator

Days, weeks & months between any two dates

Browse by Category

Finance Calculators

Free online mortgage, loan, retirement, 401(k), tax, and investment calculators.

Calculators

Free online calculators for BMI, percentages, grades, calories, and everyday math.

Developer Tools

Free online developer tools for JSON, Base64, regex, hashing, and more.

Text Tools

Free online text tools for word counting, case conversion, and more.

Converters

Free online converters for units, numbers, and data formats.

SEO Tools

Free online SEO tools for meta tags, sitemaps, and keyword analysis.

Generators

Free online generators for passwords, QR codes, UUIDs, and more.

Recently Added Tools

Savings Goal Calculator

Calculate how long it takes to reach your savings goal. See the monthly deposit needed, interest earned, and milestone timeline. Free, instant, no signup.

401(k) Calculator

Calculate your 401(k) balance at retirement with employer matching, salary increases, and tax savings. See year-by-year growth projections. Free, instant, no signup.

Retirement Calculator

Calculate how much you need to retire comfortably. See your projected nest egg, sustainable income, and whether you are on track. Free, instant, no signup.

Body Fat Calculator

Estimate your body fat percentage using 5 methods: US Navy, Jackson-Pollock 3-site, Jackson-Pollock 7-site, BIA, and BMI-based. Compare all results side by side with health range classifications.

Macro Calculator

Calculate your daily protein, carb, and fat targets based on your body stats, activity level, and fitness goal. Includes keto, paleo, IIFYM presets and meal-by-meal breakdown.

Break-Even Calculator

Calculate your break-even point in units and revenue. Includes multi-product mode, sensitivity analysis with sliders, margin of safety, and a visual break-even chart.

All Tools

AllFinance CalculatorsCalculatorsDeveloper ToolsText ToolsConvertersSEO ToolsGenerators

Mortgage Calculator

Calculate your mortgage payment with PMI, taxes, insurance, and full amortization. State-specific tax rates, biweekly toggle. Updated April 2026.

Refinance Calculator

See if refinancing your mortgage saves you money. Calculate break-even point, monthly savings, and lifetime interest reduction. Free, instant, no signup.

Auto Loan Calculator

Calculate your car loan payment, total interest, and full amortization. Includes trade-in equity, sales tax by state, fees, and upside-down warnings.

Loan Calculator

See monthly payments and total interest for personal, student, auto, business, and home equity loans. Compare 4 scenarios side by side. Updated 2026.

Percentage Calculator

Calculate percentages instantly: find X% of Y, percentage change, or what percent X is of Y. Free online percentage calculator - no signup required.

Password Generator

Generate strong, random passwords instantly. Customize length, symbols, numbers, and case. Free secure password generator - no data stored.

QR Code Generator

Generate QR codes for URLs, text, and more. Customize colors and size. Download as PNG. Free online QR code generator - no signup required.

BMI Calculator

Calculate your Body Mass Index (BMI) instantly. Supports metric and imperial units. Free BMI calculator with health category ranges.

Age Calculator

Calculate your exact age in years, months, and days. Find total days lived, weeks, and days until next birthday. Free online age calculator.

Loan EMI Calculator

Calculate your monthly loan EMI, total interest, and payment breakdown. Free EMI calculator for home, car, and personal loans. No signup.

Tip Calculator

Calculate tips and split bills instantly. Choose preset or custom tip percentages. Free tip calculator with per-person breakdown.

JSON Formatter

Format, validate and beautify your JSON data instantly. Supports syntax highlighting, error detection, and minification. Free online tool - no signup required.

Word Counter

Count words, characters, sentences, and paragraphs instantly. Includes reading and speaking time estimates. Free online word counter - no signup.

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 to text instantly. Supports UTF-8. Free online Base64 encoder and decoder - no signup required.

Regex Tester

Test regular expressions with real-time highlighting, match details, and capture groups. Free online regex tester - no signup required.

Color Picker

Pick colors and convert between HEX, RGB, and HSL formats instantly. Free online color picker with visual preview - no signup required.

UUID Generator

Generate random UUID v4 identifiers instantly. Bulk generation, uppercase, and hyphen options. Free UUID generator - no signup required.

MD5 Hash Generator

Generate MD5 hashes from any text instantly. Free online MD5 hash generator with one-click copy - no signup required.

URL Encoder/Decoder

Encode and decode URLs and query parameters instantly. Supports encodeURIComponent and encodeURI. Free online URL encoder/decoder.

SHA-256 Generator

Generate SHA-256 hashes from any text using the Web Crypto API. Free online SHA-256 hash generator - no signup required.

Case Converter

Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and more. Free online case converter.

CSS Gradient Generator

Create beautiful CSS gradients with a visual editor. Supports linear, radial, and conic gradients. Copy CSS code instantly. Free online tool.

Timestamp Converter

Convert between Unix timestamps and human-readable dates. Live current timestamp, ISO 8601, and UTC formats. Free online timestamp converter.

Interest Calculator

Calculate compound interest and simple interest instantly. Free interest calculator with yearly breakdown, growth chart, and multiple compounding options. No signup needed.

Character Counter

Count characters, letters, words, sentences, and paragraphs instantly. Free character counter with letter frequency analysis. Great for Twitter, essays, and SEO.

HEX to RGB Converter

Convert HEX color codes to RGB and HSL values instantly. Free color converter with live preview, color picker, and one-click copy. Works both ways.

Markdown to HTML

Convert Markdown to clean HTML code instantly. Free Markdown to HTML converter with live preview, syntax highlighting, and one-click copy. No signup required.

Lorem Ipsum Generator

Generate lorem ipsum placeholder text in paragraphs, sentences, or words. Free dummy text generator for web design, mockups, and prototyping. Copy with one click.

Calorie Calculator

Calculate your daily calorie needs based on age, gender, weight, height, and activity level. Free TDEE and BMR calculator for weight loss, maintenance, and muscle gain.

Grade Calculator

Calculate your final grade with simple or weighted averages. Free grade calculator for students with letter grade conversion. Add unlimited assignments.

GPA Calculator

Calculate your college GPA on a 4.0 scale. Free GPA calculator with letter grades, credit hours, and quality points. Add unlimited courses instantly.

Text to Slug

Convert any text into a clean URL slug instantly. Free slug generator with custom separators, SEO length check, and URL preview. Great for blogs and web development.

CSS Minifier

Minify CSS code instantly to reduce file size and improve page speed. Free CSS minifier that removes comments, whitespace, and redundant code. One-click copy.

JavaScript Minifier

Minify JavaScript code to reduce file size and boost page speed. Free JS minifier that strips comments and whitespace. One-click copy for production use.

HTML Minifier

Minify HTML code to reduce page size and improve load times. Free HTML minifier removes comments, whitespace, and redundant tags. Copy minified HTML instantly.

Binary to Decimal

Convert binary numbers to decimal, octal, and hexadecimal instantly. Free binary to decimal converter with bidirectional conversion. Great for students and programmers.

Decimal to Binary

Convert decimal numbers to binary, octal, and hexadecimal instantly. Free decimal to binary converter with grouped bit display. Perfect for students and developers.

Number to Words

Convert any number to words instantly. Free number to words converter that spells out numbers in English. Perfect for checks, legal documents, and invoices.

Roman Numeral Converter

Convert between Roman numerals and decimal numbers instantly. Free Roman numeral converter with a reference chart. Supports numbers 1 to 3999.

Temperature Converter

Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly. Free temperature converter with common reference points. Fast and easy to use.

Length Converter

Convert between meters, feet, inches, kilometers, miles, and more. Free length converter with 9 units and instant results. Perfect for construction, travel, and science.

Weight Converter

Convert between kilograms, pounds, ounces, grams, stones, and more. Free weight converter with 7 units and instant results. Great for cooking, fitness, and shipping.

Time Zone Converter

Convert time between world time zones instantly. Free time zone converter with 27 zones, date picker, and popular city quick view. Schedule meetings across the globe.

Invoice Generator

Create professional invoices in seconds. Free invoice generator with PDF download, 40+ currencies, and your logo. No signup, no email required.

Income Tax Calculator

Estimate your 2025 federal and state income taxes. Free tax calculator with deductions, credits, FICA, and effective vs marginal rate breakdown.

Compound Interest Calculator

See how investments grow with monthly contributions and any compounding frequency. Goal mode, inflation toggle, year by year chart. Updated 2026.

Salary to Hourly Calculator

Convert your annual salary to an hourly wage (or vice versa) with custom hours per week, PTO adjustment, and overtime. See your pay at every frequency.

Investment Return Calculator

Calculate your investment return, ROI, CAGR, and total gain. Supports stocks, bonds, real estate, crypto, and business investments with tax estimates.

ROI Calculator

Calculate ROI for marketing campaigns, rental properties, and business projects. Includes ROAS, cap rate, cash-on-cash, NPV, IRR, and payback period.

Profit Margin Calculator

Calculate gross, operating, and net profit margins. Includes reverse pricing mode, industry benchmarks for 20+ sectors, markup vs margin converter, and bulk product mode.

Break-Even Calculator

Calculate your break-even point in units and revenue. Includes multi-product mode, sensitivity analysis with sliders, margin of safety, and a visual break-even chart.

Macro Calculator

Calculate your daily protein, carb, and fat targets based on your body stats, activity level, and fitness goal. Includes keto, paleo, IIFYM presets and meal-by-meal breakdown.

Body Fat Calculator

Estimate your body fat percentage using 5 methods: US Navy, Jackson-Pollock 3-site, Jackson-Pollock 7-site, BIA, and BMI-based. Compare all results side by side with health range classifications.

Retirement Calculator

Calculate how much you need to retire comfortably. See your projected nest egg, sustainable income, and whether you are on track. Free, instant, no signup.

401(k) Calculator

Calculate your 401(k) balance at retirement with employer matching, salary increases, and tax savings. See year-by-year growth projections. Free, instant, no signup.

Savings Goal Calculator

Calculate how long it takes to reach your savings goal. See the monthly deposit needed, interest earned, and milestone timeline. Free, instant, no signup.