Free Online Tools
Fast, private, and free. Every tool runs entirely in your browser — no data leaves your device.
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting.
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time.
Password Generator
Generate strong, secure passwords with customizable length and character types.
QR Code Generator
Generate QR codes from any text or URL. Download as PNG.
Image Compressor
Compress images in your browser. Reduce file size without losing quality.
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 back to text instantly in your browser.
Markdown Preview
Render Markdown to HTML with a live preview. Write and preview Markdown instantly in your browser.
URL Encoder/Decoder
Encode or decode URLs and query string parameters. Supports encodeURIComponent and encodeURI modes.
Regex Tester
Test and debug regular expressions with live matching, match highlighting, and capture group support.
Color Converter
Convert colors between HEX, RGB, and HSL formats with a live preview swatch.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text by words, sentences, or paragraphs.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text instantly in your browser.
Case Converter
Convert text between uppercase, lowercase, title case, sentence case, camelCase, snake_case, and kebab-case.
Diff Checker
Compare two blocks of text and highlight the differences. See additions, removals, and unchanged content at a glance.
SVG to PNG Converter
Convert SVG files to PNG images at custom resolutions. Upload or paste SVG code and download high-quality PNGs.
JSON to CSV Converter
Convert JSON arrays of objects to CSV format. Handles nested objects, mixed keys, and special characters.
UUID Generator
Generate random UUID v4 identifiers in bulk. Customize format with hyphens, uppercase, and copy with one click.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and dates to Unix timestamps. Live clock, UTC and local time, relative time display.
JWT Decoder
Decode JWT tokens to inspect the header, payload, and signature. View expiration status and human-readable timestamps.
Image Resizer
Resize images to custom dimensions with aspect ratio lock. Upload JPEG, PNG, or WebP and download as PNG or JPEG.
Slug Generator
Convert any text to clean, URL-safe slugs. Handles unicode, accented characters, and HTML with customizable separators and length limits.
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and any custom base (2-36) instantly.
CSS Gradient Generator
Create beautiful CSS gradients with a visual editor. Supports linear and radial gradients with multiple color stops.
Box Shadow Generator
Generate CSS box-shadow values with a visual editor. Adjust offset, blur, spread, color, and opacity with live preview.
Meta Tag Generator
Generate HTML meta tags for SEO, Open Graph, and Twitter Cards. Preview and copy optimized meta tags instantly.
S-Corp vs LLC Tax Calculator
Compare tax obligations for S-Corp vs LLC business structures. See self-employment tax savings, payroll costs, and total tax burden side by side.
RSU Tax Calculator
Calculate taxes owed on Restricted Stock Unit (RSU) vesting events. Estimate federal and state tax withholding, net shares, and take-home value.
Stock Options Tax Calculator
Compare tax implications of ISO vs NSO stock options. Calculate AMT exposure, capital gains, and optimal exercise strategies.
Mortgage Payoff Calculator
Calculate how extra payments can pay off your mortgage early. See total interest saved, payoff date, and amortization schedule.
HSA Investment Growth Calculator
Project the tax-free growth of your Health Savings Account. Calculate triple tax advantages, contribution limits, and long-term investment returns.
Coast FIRE Calculator
Calculate your Coast FIRE number and the age you can stop saving for retirement. See how existing investments grow to your target without new contributions.
EV vs Gas Cost Calculator
Compare the total cost of owning an electric vehicle vs a gas car. Factor in fuel, electricity, maintenance, insurance, and tax credits.
Roth IRA Conversion Calculator
Estimate the tax cost and long-term benefit of converting a Traditional IRA to a Roth IRA. Compare after-tax values at retirement.
PMI Removal Calculator
Calculate when you can remove Private Mortgage Insurance. See your equity milestone, estimated removal date, and total PMI cost.
Quarterly Tax Calculator
Calculate estimated quarterly tax payments for freelancers and self-employed workers. Covers federal income tax, self-employment tax, and payment deadlines.
Heat Pump Savings Calculator
Estimate annual savings from switching to a heat pump. Compare heating and cooling costs against furnace, AC, and other HVAC systems.
FIRE Calculator
Calculate your path to Financial Independence, Retire Early. Estimate your FIRE number, savings rate, and years to retirement.
Rental Property ROI Calculator
Analyze rental property returns including cash-on-cash return, cap rate, cash flow, and total ROI with financing.
Air Fryer Conversion Calculator
Convert conventional oven recipes to air fryer settings. Automatically adjust temperature and cooking time for perfect results.
Gig Worker Tax Calculator
Estimate taxes for DoorDash, Uber, Lyft, and other gig platform income. Calculate self-employment tax, deductions, and quarterly payments.
Debt Free Date Calculator
Calculate your debt-free date using snowball or avalanche payoff methods. See total interest paid and optimal payment strategies.
Home Office Deduction Calculator
Calculate your home office tax deduction using the simplified or actual expense method. Compare both methods to maximize your deduction.
Emergency Fund Calculator
Calculate how much you need in your emergency fund based on monthly expenses, income stability, and personal risk factors.
Medicare IRMAA Calculator
Calculate Medicare Part B and Part D IRMAA surcharges based on your income. Plan to avoid or minimize income-related premium adjustments.
Food Cost Percentage Calculator
Calculate food cost percentage for restaurants. Determine menu pricing, portion costs, and ideal food cost ratios for profitability.
Paver Calculator
Calculate how many pavers you need for your patio, walkway, or driveway. Estimate materials, sand, gravel base, and total cost.
Fence Calculator
Estimate materials needed for a fence project. Calculate posts, rails, pickets, concrete, and total cost for wood, vinyl, or chain link fences.
Freelance Rate Calculator
Calculate your ideal freelance hourly rate based on target income, business expenses, taxes, and billable hours.
Etsy Fee Calculator
Calculate Etsy seller fees, profit margins, and optimal pricing. Includes listing fees, transaction fees, payment processing, and shipping costs.
Salary to Hourly Converter
Convert between annual salary, monthly, biweekly, weekly, and hourly pay rates. Factor in taxes to see your after-tax equivalent.
Percentage Calculator
Calculate percentages instantly: find X% of Y, determine what percent X is of Y, and compute percentage change between two values.
Compound Interest Calculator
Calculate compound interest with optional monthly contributions. See future value, total interest earned, and a year-by-year breakdown.
Loan Calculator
Calculate monthly loan payments, total interest, and view a full amortization schedule for any loan or mortgage.
Text Rewriter
Rewrite text by reversing words, shuffling, removing duplicates, sorting lines, reversing characters, cleaning spaces, and adding line numbers.
Invoice Generator
Create professional invoices with line items, tax calculation, and PDF download. Fill in business and client details, add items, and print or save as PDF.
Resume Builder
Build a professional resume with a live preview. Add work experience, education, skills, and download as PDF.
Privacy Policy Generator
Generate a comprehensive privacy policy for your website. Select data collection types and compliance requirements to create a customized policy.
Robots.txt Generator
Generate robots.txt files with user-agent rules, allow/disallow paths, sitemap URL, and crawl-delay. Includes preset templates for common configurations.
Favicon Generator
Generate favicons in all standard sizes from a single image. Upload PNG, JPG, or SVG and download optimized favicons for browsers and devices.
Readability Analyzer
Analyze text readability with Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, and ARI scores. Get grade level estimates and improvement suggestions.
Rent Affordability Calculator
Calculate how much rent you can afford based on income, debts, and the 50/30/20 budget rule. See a full monthly budget breakdown.
Subscription Cost Tracker
Track and audit your monthly subscriptions. See total monthly and yearly costs, identify wasteful spending, and get a category breakdown.
Severance & Unemployment Calculator
Estimate your severance pay and state unemployment benefits. See how severance affects unemployment eligibility and plan your financial runway.
Total Compensation Calculator
Compare two job offers side by side with salary, bonus, equity, 401k match, health insurance, and PTO. See the true total compensation value.
AI API Pricing Calculator
Compare AI model API costs across providers. Estimate monthly spend based on your token usage for OpenAI, Anthropic, Google, and more.
Email Subject Line Analyzer
Analyze and score your email subject lines. Check length, spam words, emotional tone, and preview how subjects appear on mobile devices.
Meeting Cost Calculator
Calculate the real cost of meetings with a live ticking counter. Enter attendees and salaries to see money spent in real time.
Color Contrast Checker
Check color contrast ratios for WCAG 2.1 AA/AAA compliance. Test text and background colors, simulate color blindness, and audit full palettes.
Contractor vs Full-Time Calculator
Compare contractor (1099) vs full-time (W-2) compensation. Factor in benefits, self-employment tax, expenses, and effective hourly rate.
BMI Calculator
Calculate your Body Mass Index (BMI) with imperial or metric units. See your BMI category, healthy weight range, and a visual BMI scale.
Unit Converter
Convert between units of length, weight, temperature, volume, area, speed, time, and digital storage instantly in your browser.
Tip Calculator
Calculate tips, split bills, and compare tip percentages. See per-person amounts and round up totals instantly.
Cron Expression Generator
Build, parse, and validate cron expressions with a visual editor. See human-readable descriptions and the next scheduled run times.
Color Palette Generator
Generate harmonious color palettes from any base color. Supports complementary, analogous, triadic, split-complementary, monochromatic, and tetradic schemes.
Age Calculator
Calculate your exact age in years, months, and days. See total days lived, weeks, zodiac sign, day of birth, and countdown to your next birthday.
Pomodoro Timer
Stay focused with the Pomodoro Technique. Customizable work and break timers with automatic session cycling, progress tracking, and audio notifications.
SQL Formatter
Format, beautify, and minify SQL queries with proper indentation and keyword highlighting.
JSON to YAML Converter
Convert between JSON and YAML formats instantly. Paste JSON to get YAML or YAML to get JSON with customizable indentation.
Timezone Converter
Convert times between timezones instantly. Compare multiple destinations, see current time in popular timezones, and handle daylight saving time automatically.
Character Counter
Count characters, words, sentences, and paragraphs with real-time social media platform limits. Check your text against Twitter/X, Instagram, LinkedIn, YouTube, Facebook, TikTok, and meta tag limits.
Random Number Generator
Generate random numbers, roll dice, and flip coins. Choose integer or decimal, set min/max range, allow or disallow duplicates, and sort results.
HTML to Markdown Converter
Convert HTML to Markdown or Markdown to HTML instantly. Supports headings, bold, italic, links, images, lists, tables, code blocks, and blockquotes.
Open Graph Preview
Preview how your links will appear on Facebook, Twitter/X, LinkedIn, Discord, and Slack. Generate Open Graph and Twitter Card meta tags with live platform previews.
Placeholder Image Generator
Generate customizable placeholder images with custom dimensions, colors, and text. Download as PNG, JPEG, WebP, or SVG.
GPA Calculator
Calculate your semester and cumulative GPA on a 4.0 scale. Add courses with letter grades and credit hours, toggle weighted/unweighted scales, and see Latin honors classification.
CSS Minifier / Beautifier
Minify CSS to reduce file size or beautify it with proper indentation. See size savings and copy the result instantly.
Aspect Ratio Calculator
Calculate and convert aspect ratios for images and video. Find dimensions, resize proportionally, and browse social media presets.
Discount Calculator
Calculate sale prices, discount percentages, and original prices. Stack multiple discounts, apply dollar-off coupons, add sales tax, and compare common discount levels.
JavaScript Minifier / Beautifier
Minify or beautify JavaScript code instantly in your browser. Remove comments and whitespace to reduce file size, or format minified code with proper indentation.
PDF Merge
Merge multiple PDF files into one document. Drag to reorder pages, preview before merging. All processing happens in your browser — files never leave your device.
Image Format Converter
Convert images between WebP, PNG, JPG, and GIF formats. Batch convert multiple files at once. All processing happens in your browser.
Calorie Calculator
Calculate your daily calorie needs based on age, gender, height, weight, and activity level. Uses the Mifflin-St Jeor equation for accurate TDEE estimates.
PDF Compress
Reduce PDF file size in your browser. Compress images, remove metadata, and optimize structure. Files never leave your device.
Paycheck Calculator
Calculate your take-home pay after federal and state taxes, Social Security, and Medicare. See your net pay per paycheck for any pay frequency.
YouTube Thumbnail Downloader
Download YouTube video thumbnails in all available resolutions. Just paste a YouTube URL to get the thumbnail instantly.
Word to PDF Converter
Convert Word documents (DOCX) to PDF directly in your browser. Preserves formatting, headings, and images. Files never leave your device.
Text to Speech
Convert text to speech using your browser built-in voices. Adjust speed, pitch, and select from dozens of voices and languages. Free, no limits.
Screen Recorder
Record your screen directly in your browser. Capture tabs, windows, or full screen with optional audio. No install, no signup, no watermark.
Hashtag Generator
Generate relevant hashtags for Instagram, TikTok, and Twitter/X. Browse by niche, see popularity tiers, and copy optimized hashtag sets.
Macro Calculator
Calculate your daily macronutrient needs — protein, carbs, and fat — based on your goals. Supports cutting, maintenance, and bulking targets.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method. Enter measurements for neck, waist, and hips to get your body fat category and lean mass.
Color Picker from Image
Upload an image and click anywhere to pick colors. Get HEX, RGB, and HSL values instantly. Auto-extract dominant color palettes from any image.
Markdown Table Generator
Generate Markdown tables with a visual spreadsheet-like editor. Set alignments, import CSV/TSV, and copy the output instantly.
CSV to JSON Converter
Convert CSV data to JSON and JSON arrays to CSV. Supports custom delimiters, quoted fields, and pretty-printed output.
Border Radius Generator
Generate CSS border-radius values with a visual editor. Set each corner independently or link them, choose px or %, and copy the CSS instantly.
Typing Speed Test
Test your typing speed and accuracy with real-time feedback. See WPM, accuracy, and error count as you type. Choose from easy, medium, or hard passages.
Chmod Calculator
Calculate Linux file permissions with an interactive chmod calculator. Convert between octal, symbolic, and checkbox representations instantly.
Text Shadow Generator
Generate CSS text-shadow values with a live preview. Add multiple shadow layers, customize offsets, blur, and colors, and apply common presets.
Flexbox Generator
Generate CSS flexbox layouts visually. Set container and item properties with a live preview and copy the generated CSS code.
HTTP Status Code Reference
Browse, search, and look up HTTP status codes. View detailed descriptions, categories, and whether each code is commonly used in REST APIs.
JSON Schema Generator
Generate JSON Schema from example JSON data. Supports Draft 2020-12 and Draft-07, nested objects, arrays, strict mode, and instant validation.
Emoji Picker & Search
Browse, search, and copy emojis by category. Get emoji details including Unicode code points, HTML entities, CSS codes, and shortcodes.
Roman Numeral Converter
Convert between Roman numerals and Arabic numbers instantly. Supports values from 1 to 3,999.
Grade Calculator
Calculate your final grade, weighted average, and find out what score you need on your final exam to reach your target grade.
Fuel Cost Calculator
Calculate fuel costs for any trip. Enter distance, fuel efficiency, and gas price to estimate your trip cost and fuel needed.
Due Date Calculator
Calculate your estimated due date based on your last menstrual period or conception date. Get week-by-week pregnancy timeline and trimester information.
Date Calculator
Calculate the number of days between two dates, or add and subtract days from any date. Find business days, weeks, months, and years between dates.
Electricity Cost Calculator
Calculate the electricity cost of running any appliance. Enter wattage, usage hours, and electricity rate to see daily, monthly, and yearly costs.
Pace Calculator
Calculate running pace, speed, distance, or time. Convert between min/mile, min/km, and mph. Perfect for runners and race planning.
Scientific Calculator
Free online scientific calculator with trigonometric, logarithmic, and advanced math functions. Supports parentheses, exponents, and constants.
Sleep Calculator
Calculate the best times to sleep and wake up based on 90-minute sleep cycles. Wake up feeling refreshed by aligning with your natural sleep cycles.
Blood Pressure Checker
Check your blood pressure category based on your systolic and diastolic readings. Understand what your blood pressure numbers mean with AHA guidelines.
Sales Tax Calculator
Calculate sales tax for any purchase by state. See combined state and local rates, tax-exempt items, and total cost after tax.
Home Affordability Calculator
Calculate how much house you can afford based on income, debts, down payment, and interest rate. See maximum home price and monthly payment breakdown.
Life Insurance Calculator
Calculate how much life insurance you need using the DIME method. Factor in debt, income replacement, mortgage, and education costs.
Auto Loan Calculator
Calculate monthly car payments with trade-in value, down payment, sales tax, and fees. Compare loan terms and see total interest paid.
Capital Gains Tax Calculator
Calculate federal and state capital gains tax on stocks, crypto, and real estate. See short-term vs long-term rates and net profit after tax.
Closing Cost Calculator
Estimate home closing costs by state. See lender fees, title insurance, transfer taxes, prepaid items, and total cash needed to close.
Net Worth Calculator
Calculate your net worth by adding assets and subtracting liabilities. Track by category with local storage persistence.
Cost of Living Calculator
Compare cost of living between US cities. See housing, food, transportation, healthcare differences and salary adjustment needed.
Estate Tax Calculator
Calculate federal and state estate tax for 2026. See the exemption threshold, graduated rates, and effective tax rate on your estate.
Self-Employment Tax Calculator
Calculate self-employment tax on 1099 income. See Social Security, Medicare, quarterly payments, and the deductible half of SE tax.
Property Tax Calculator
Estimate annual property taxes by state and county. See effective tax rates and how your taxes compare to the national average.
Home Insurance Calculator
Estimate annual homeowners insurance cost by state, coverage level, and deductible. See average rates and cost factors.
Retirement Calculator
Calculate how much you need to retire. See projected savings growth, Social Security estimates, and whether you are on track.
Ovulation Calculator
Calculate your ovulation date and fertile window based on your menstrual cycle. Track your most fertile days for family planning.
Water Intake Calculator
Calculate how much water you should drink daily based on your weight, activity level, and climate. Get personalized hydration recommendations.
Ideal Weight Calculator
Calculate your ideal body weight using multiple scientific formulas. Compare results from Devine, Robinson, Miller, and Hamwi methods.
Pixel to REM Converter
Convert between pixels (px) and rem units for CSS. Set a custom base font size and get instant conversions with a handy reference table.
Pregnancy Weight Gain Calculator
Calculate your recommended pregnancy weight gain based on your pre-pregnancy BMI. Get week-by-week weight gain targets using IOM guidelines.
Heart Rate Zone Calculator
Calculate your heart rate training zones based on age or maximum heart rate. Find your fat burn, cardio, and peak zones for optimal training.
Download Time Calculator
Calculate how long it takes to download a file based on your internet speed. Supports all file sizes from KB to TB and connection speeds from Kbps to Gbps.
Cooking Measurement Converter
Convert between cups, tablespoons, teaspoons, ounces, milliliters, liters, and grams. Perfect for scaling recipes and international cooking.
Countdown to Date
Count down the days, hours, minutes, and seconds until any date. Track time remaining to holidays, birthdays, weddings, and special events.
Shoe Size Converter
Convert shoe sizes between US, UK, EU, and CM (Japan) sizing systems. Includes men's, women's, and children's size charts.
Gift Finder
Find the perfect gift with our interactive quiz. Answer a few questions about the recipient, occasion, budget, and interests to get personalized gift recommendations.
One Rep Max Calculator
Calculate your one rep max (1RM) using multiple proven formulas. Enter the weight and reps you performed to estimate your maximum single-rep strength.
Dog Age Calculator
Calculate your dog's age in human years using the latest scientific formula. More accurate than the old 7:1 rule. Accounts for dog size and breed.
Concrete Calculator
Calculate how much concrete you need for slabs, footings, walls, and columns. Get results in cubic yards and number of bags needed.
Paint Calculator
Calculate how much paint you need for any room. Enter room dimensions, number of doors and windows, and coats to get the exact gallons needed.
Wind Chill Calculator
Calculate the wind chill temperature based on actual temperature and wind speed. See frostbite risk times and safety recommendations.
Heat Index Calculator
Calculate the heat index (feels-like temperature) based on air temperature and relative humidity. See heat danger levels and safety precautions.
Ring Size Converter
Convert ring sizes between US, UK, EU, and Japanese sizing systems. Find your ring size from finger circumference or diameter measurements.
Bra Size Calculator
Calculate your bra size from your band and bust measurements. Convert between US, UK, and EU sizing. Get sister size recommendations.
Tire Size Calculator
Compare tire sizes and see how different tires affect your speedometer, ground clearance, and odometer. Enter two tire sizes to see the differences.
Baby Name Generator
Generate random baby name ideas filtered by gender, first letter, length, and origin. Browse popular and unique names for your baby.
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