All Tools
Browse our collection of free online tools
Popular Tools
BMI Calculator
Calculate your Body Mass Index (BMI) with support for both metric and imperial units. See your BMI category, visual scale, and reference table instantly.
Password Generator
Generate strong, secure random passwords with customizable length, character sets, and strength indicators. Uses cryptographically secure randomness for maximum security.
JSON Formatter
Format, beautify, and minify JSON data online. Validate JSON syntax with detailed error messages including line and column numbers. Supports 2-space, 4-space, and tab indentation.
Tax Calculator
Comprehensive 2024 US tax calculator estimating federal income tax, FICA (Social Security + Medicare), and state income tax. See your total tax burden breakdown and take-home pay on annual, monthly, biweekly, and weekly basis.
Percentage Calculator
Calculate percentages instantly: find what percent of a number is, what percentage one number is of another, or the percentage change between two values.
Word Counter Online
Free online word counter tool. Instantly count words, characters, sentences, paragraphs, and reading time. Supports real-time analysis with keyword density tracking. 100% client-side -- your text never leaves your browser.
Browse by Category
Health
(7)Track and monitor your health metrics
BAC Calculator UK
Estimate your Blood Alcohol Concentration (BAC) for the UK with drink driving limits for England, Wales, Northern Ireland, and Scotland. Uses UK alcohol units, metric measurements, and the Widmark formula.
BMI Calculator
Calculate your Body Mass Index (BMI) with support for both metric and imperial units. See your BMI category, visual scale, and reference table instantly.
Body Fat Calculator
Calculate your body fat percentage using the US Navy method. Enter your measurements to get body fat %, fat mass, lean mass, and your fitness category.
Calorie Calculator
Calculate your daily calorie needs based on age, gender, height, weight, and activity level. Uses the Mifflin-St Jeor equation for accurate BMR and TDEE estimates.
Drink Calculator UK
Calculate how many UK alcohol units are in any drink. Convert volume and ABV to unit equivalents, track your drinks for the evening, and stay within the Chief Medical Officers’ guideline of 14 units per week.
Drink Drive Limit Calculator
Calculate your blood alcohol concentration (BAC) and check against UK drink drive limits. Estimate how many UK alcohol units you have consumed, your impairment level, and time until sober based on weight and drinks consumed.
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor equation. Get your BMR, daily calorie needs by activity level, and macro breakdown for weight loss, maintenance, or gain.
Finance
(29)Calculate taxes, loans, and investments
ABN Validator
Check and validate Australian Business Numbers (ABNs) instantly. Free online tool with weighted checksum verification, entity type detection, and ABN format guidance. All processing happens in your browser.
Capital Gains Tax Calculator UK
Free UK Capital Gains Tax calculator for the 2025/26 tax year. Calculate CGT on property, shares, and other assets using official HMRC rates. See your tax-free allowance, taxable gain, and CGT bill with a full breakdown.
Compound Interest Calculator
Calculate compound interest with monthly contributions. See how your savings grow over time with a detailed year-by-year breakdown, total interest earned, and final balance.
CPP Calculator Canada
Estimate your Canada Pension Plan (CPP) retirement pension. Calculate your monthly and annual CPP benefit based on your age, contribution history, and start age. Includes 2025/2026 CPP rates, early and delayed pension adjustments, and CPP2 enhancement.
Dividend Tax Calculator UK
Calculate your UK dividend tax for the 2025/26 tax year. Enter your salary and dividend income to see your dividend tax bill, effective rate, and take home pay with accurate HMRC rates.
Freelance Rate Calculator
Calculate your ideal freelance hourly rate based on desired income, business expenses, taxes, and billable hours. Convert between hourly, daily, weekly, and project rates for accurate freelance pricing.
Fuel Cost Calculator Australia
Calculate fuel costs for your trip in Australia. Enter distance, fuel consumption (L/100km), and fuel price to estimate your total petrol or diesel costs in AUD.
Income Tax Calculator
Calculate your 2024 US federal income tax with accurate tax brackets. Supports all filing statuses: Single, Married Filing Jointly, Married Filing Separately, and Head of Household. See your effective tax rate and bracket-by-bracket breakdown.
Income Tax Calculator Australia
Calculate your Australian income tax for the 2025-26 financial year with accurate ATO tax brackets. See your bracket-by-bracket breakdown, Medicare levy, Low Income Tax Offset (LITO), and fortnightly/monthly take home pay.
Income Tax Calculator UK
Calculate your UK income tax for the 2025/26 tax year with accurate HMRC tax bands. Supports England, Wales, Northern Ireland, and Scotland rates. See your bracket-by-bracket breakdown, National Insurance, and monthly/weekly take home pay.
Inheritance Tax Calculator UK
Calculate UK inheritance tax (IHT) for 2025/26. Enter estate value, property details, and gifts to see your IHT liability with nil-rate band, residence nil-rate band, and spouse exemption applied.
Loan Calculator
Calculate your monthly loan payment, total interest, and total cost. View a full amortization schedule showing principal and interest breakdown for each period.
Mortgage Points Calculator
Calculate whether buying mortgage discount points is worth it. Compare monthly payments, break-even period, and total savings over the life of your loan to make an informed decision.
Pay Calculator
Convert your pay between hourly, daily, weekly, fortnightly, monthly, and annual amounts in Australian dollars. Factor in hours per week and weeks per year for accurate salary comparisons.
RRSP Withdrawal Tax Calculator
Calculate the withholding tax on RRSP withdrawals in Canada. Estimate federal and provincial taxes on lump-sum RRSP withdrawals with a detailed breakdown by province, withdrawal amount, and residency.
Salary Calculator
Convert your salary between hourly, daily, weekly, biweekly, monthly, and annual amounts. Factor in work hours per week, paid time off, and holidays to see your true earnings across every pay period.
Salary Calculator UK
Calculate your UK salary after tax for the 2025/26 tax year. Convert between annual, monthly, weekly, daily, and hourly pay. See your Income Tax, National Insurance, and take home pay with full bracket breakdowns for England, Wales, NI, and Scotland.
Severance Pay Calculator
Estimate your severance pay based on years of service, salary, and common US severance formulas. Calculate lump-sum and periodic severance packages with tax withholding estimates.
Stamp Duty Calculator NSW
Calculate NSW stamp duty (transfer duty) on property purchases. Includes first home buyer exemptions, concessions, foreign surcharge, and premium property rates for New South Wales.
Student Loan Repayment Calculator UK
Free UK student loan repayment calculator for the 2025/26 tax year. Calculate your monthly and annual repayments for Plan 1, Plan 2, Plan 4, Plan 5, and Postgraduate loans using official SLC thresholds.
Take Home Pay Calculator
Calculate your UK take home pay after Income Tax and National Insurance. Enter your annual salary to see monthly and weekly breakdowns using 2024/25 HMRC tax bands and NI thresholds.
Tax Bracket Calculator
Find out which 2024 US federal tax bracket you fall into. Visual bracket chart, side-by-side comparison across all filing statuses, and 2023 vs 2024 historical bracket changes.
Tax Calculator
Comprehensive 2024 US tax calculator estimating federal income tax, FICA (Social Security + Medicare), and state income tax. See your total tax burden breakdown and take-home pay on annual, monthly, biweekly, and weekly basis.
Tax Calculator Canada
Calculate your 2025 Canadian federal income tax with accurate CRA tax brackets. Includes CPP, CPP2, and EI deductions. See your bracket-by-bracket breakdown, effective tax rate, and take-home pay on annual, monthly, biweekly, and weekly basis.
Tax Calculator UK
Free UK tax calculator for the 2025/26 tax year. Calculate Income Tax, National Insurance, and take home pay using official HMRC rates. Supports England, Wales, Northern Ireland, and Scotland tax bands with full bracket-by-bracket breakdowns.
TFSA Contribution Room Calculator
Calculate your total TFSA contribution room for 2026. Enter your year of birth and past contributions to find your remaining Tax-Free Savings Account room based on CRA annual limits.
Tip Calculator
Calculate how much to tip at restaurants, bars, and for services. Split the bill between multiple people with customizable tip percentages.
VAT Calculator UK
Free UK VAT calculator. Add or remove VAT at 20% standard rate or 5% reduced rate. Calculate net, gross, and VAT amounts instantly. All calculations performed in your browser.
Wage Calculator
Convert your wage between hourly, daily, weekly, bi-weekly, semi-monthly, monthly, and annual amounts. Factor in hours per week and weeks per year for accurate salary comparisons.
Dev Tools
(12)Utilities for developers and designers
Color Contrast Checker
Check color contrast ratios for WCAG 2.1 compliance. Enter foreground and background colors to see AA and AAA pass/fail results for normal and large text. Free accessibility tool.
DNS Propagation Checker
Check DNS propagation across global servers instantly. Verify A, AAAA, CNAME, MX, NS, TXT, and SOA records from 7 independent resolvers worldwide. Free, fast, and private -- no data stored.
Find My IP Address
Instantly find your public IP address. See your IPv4 address, timezone, browser details, and copy your IP to clipboard with one click. Free, fast, and private.
Hex Color to Pantone Converter
Convert hex color codes to the closest Pantone color match. Uses Delta-E color distance in CIELAB color space for accurate matching. View RGB, HSL, and CMYK conversions.
JSON Formatter
Format, beautify, and minify JSON data online. Validate JSON syntax with detailed error messages including line and column numbers. Supports 2-space, 4-space, and tab indentation.
JSON Schema Validator Online
Validate JSON data against a JSON Schema online. Paste your schema and data, get instant validation results with detailed error messages. Free browser-based tool -- no data sent to servers.
Markdown to Confluence Converter
Convert Markdown to Confluence wiki markup instantly. Supports headings, bold, italic, links, images, code blocks, tables, and lists. Free browser-based tool with no data sent to servers.
Password Generator
Generate strong, secure random passwords with customizable length, character sets, and strength indicators. Uses cryptographically secure randomness for maximum security.
Password Strength Test
Test your password strength instantly with real-time analysis. See entropy, estimated crack time, and detailed criteria checklist. 100% client-side -- your password never leaves your browser.
Q-Format to Decimal Converter
Convert Q-format fixed-point numbers to decimal values. Supports Q15, Q31, and custom Qm.n formats used in DSP and embedded systems.
SQL Formatter Online
Format and beautify SQL queries online for free. Supports SELECT, INSERT, UPDATE, DELETE, CREATE TABLE, and more. Choose your preferred indentation and keyword casing. All processing happens in your browser.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds, with live current timestamp, UTC, ISO 8601, and relative time output.
Converters
(6)Convert images and file formats
Hourly to Salary Calculator
Convert your hourly wage to annual salary, monthly, bi-weekly, and weekly pay in Canadian dollars. Factor in hours per week and weeks per year for accurate salary comparisons. Includes Canadian minimum wage references.
Image Compressor
Free online image compressor - reduce image file size without losing quality. Compress JPEG, PNG, and WebP images entirely in your browser. No uploads, 100% private.
Image Cropper
Free online image cropper with rotation, flip, and aspect ratio controls. Crop photos to any size, rotate, and download in PNG, JPG, or WebP. 100% client-side, no uploads required.
Image Format Converter
Convert images between PNG, JPG, WebP, BMP, and GIF formats entirely in your browser. No uploads needed. Adjust quality for lossy formats and compare file sizes side by side.
Image Resizer
Resize images online for free. Drag and drop to resize by custom dimensions, percentage, or social media presets. Fast, private, 100% client-side. Supports PNG, JPG, and WebP output.
SVG to PNG Converter
Convert SVG files to PNG, JPG, or WebP online. Upload SVG files or paste SVG code, set custom dimensions, scale factors up to 4x for retina displays, and choose transparent or colored backgrounds. 100% client-side -- your files never leave your device.
Calculators
(13)Everyday math and calculations
Age Calculator
Calculate your exact age in years, months, and days from your date of birth. See total months, weeks, days, and a countdown to your next birthday.
Alcohol Calculator
Calculate blood alcohol concentration (BAC), drinks per hour metabolism, and time until sober. Estimate your BAC based on weight, gender, and number of drinks.
Annual Leave Calculator UK
Calculate your UK annual leave entitlement for full-time and part-time workers. See your statutory holiday allowance in days or hours, pro-rata for part-year starters, and whether bank holidays are included.
BAC Calculator
Estimate your Blood Alcohol Concentration (BAC) over time with a detailed drink database, projected BAC curve, and US legal limits by state. More precise than a simple alcohol calculator.
Canadian Postal Code Lookup
Look up any Canadian postal code to find the province or territory, Forward Sortation Area (FSA), and delivery type. Validate postal code format and explore the complete province-to-postal-prefix mapping used by Canada Post.
Discount Calculator
Calculate discount savings instantly. Enter the original price, discount percentage, optional stacked discount, and sales tax to see the final price, total savings, and price after tax.
Drink Calculator
Calculate how many standard drinks are in any beverage. Convert volume and ABV to standard drink equivalents, track your drinks for the night, and understand serving sizes.
GPA Calculator
Calculate your semester and cumulative GPA. Add courses with letter grades and credit hours to see your grade point average instantly.
Percentage Calculator
Calculate percentages instantly: find what percent of a number is, what percentage one number is of another, or the percentage change between two values.
Random Spinner Wheel
Spin the wheel to pick a random winner from your custom list. Add names or options, spin, and let the wheel decide. Free online random wheel picker.
Random Team Generator
Randomly divide a list of names or players into balanced teams. Enter names, choose how many teams, and generate fair random groups instantly.
Time Zone Meeting Planner
Find the best meeting time across multiple time zones. Visual hourly grid with color-coded working hours helps you identify overlapping availability instantly.
UK Postcode Lookup
Look up any UK postcode to find the postcode area, district, sector, and post town. Validate postcode format instantly and explore the complete list of 121 UK postcode areas used by Royal Mail.
Text Tools
(4)Analyze and generate text content
AI Detector
Free AI content detector that analyzes text for signs of AI generation. Checks perplexity, burstiness, vocabulary richness, sentence patterns, and repetition. 100% client-side -- your text never leaves your browser.
GDPR Privacy Policy Generator
Generate a free GDPR-compliant privacy policy for your website or app. Fill in your company details, select the data you collect, and download a ready-to-use policy.
Resignation Letter Generator
Generate a professional resignation letter in seconds. Fill in your details, choose a tone, and download a polished letter ready to send to your employer.
Word Counter Online
Free online word counter tool. Instantly count words, characters, sentences, paragraphs, and reading time. Supports real-time analysis with keyword density tracking. 100% client-side -- your text never leaves your browser.