Free Online Daily Life Tools

Free online paper size lookup tool, supports full series of paper size comparison including ISO A/B/C series, North American standards, photo sizes, special specifications, etc. Provides dual unit display in millimeters (mm) and inches (in), aspect ratio calculation, common usage explanations, an essential paper specification reference tool for designers and printing professionals.

Free online child height prediction tool, based on parental height, child's current height and age, uses multiple scientific algorithms such as Tanner method, Gray method, Bayley-Pinneau method to predict adult height, provides personalized growth and development recommendations.

Free blood type inheritance pattern calculator, predicts possible blood types of children based on parents' blood types, or verifies parent-child relationships. Supports ABO blood type and Rh factor genetic analysis, scientifically accurate.

Free online blood type personality analysis tool, supports personality tests and compatibility analysis for four blood types: A, B, AB, and O. Learn about personality traits, strengths and weaknesses, love views, and career development directions of different blood types, and view compatibility scores between blood types.

Free online body health calculation tool, supports calculation of BMI, body fat percentage, basal metabolic rate (BMR), total daily energy expenditure (TDEE), waist-to-hip ratio, ideal weight and other health indicators. Scientifically assesses physical health status based on height, weight, age, gender and other data.

Free online female safe period calculation tool, supports both single calculation and cycle tracking modes, intelligently predicts ovulation period, safe period and next menstrual date. Provides menstrual cycle management and physiological cycle tracking features.

Free online physical fitness and health test tool, comprehensively assesses your physical health through multiple indicators including BMI, cardiovascular function, muscle strength, flexibility, speed, endurance, and provides personalized exercise recommendations. Suitable for student fitness testing and health assessment for sports enthusiasts.

Free online WeChat multi-instance script generator, supports Windows, macOS and Linux systems, generates WeChat multi-instance startup scripts with one click, enables simultaneous login of multiple WeChat accounts without installing additional software.

Free online random name picker tool, supports batch import of lists, custom number of draws, non-repeating draw mode, suitable for classroom roll calls, lucky draws, meeting speakers and other scenarios. Simple operation, fair and random results.

Free online random list grouping tool, supports random assignment by group count or number of members per group. Suitable for team grouping, activity drawing, competition grouping, classroom grouping and other scenarios. Supports import and export of lists, balanced grouping algorithm.

Free online name generation tool, supports multiple modes including Chinese names, English names, ancient style names, and creative combinations. Customizable parameters such as gender, surname, quantity, generate unique names with one click, suitable for novel characters, game IDs, virtual identities and other scenarios.

Free online ID card number validation tool, supports 18-digit Chinese ID card validity verification, birth date parsing, gender determination, and origin identification. Real-time validation of ID card format and check digit calculation, quickly identifies invalid ID cards. Suitable for real-name authentication, data entry, data auditing and other scenarios.

Free online bank card number validation tool, supports Luhn algorithm verification of card number validity, identification of issuing bank, card type and other information. Supports single card validation and batch validation, with data security and no upload to server. Suitable for payment interface testing, financial information verification and other scenarios.

Free online nickname generator supporting personal and couple nicknames. Multiple styles available: Cute, Cool, Literary, Mysterious, Humorous. Custom keywords, length settings, numbers and symbols support.

Free online loan calculator supporting commercial loans, housing provident fund loans, and combined loans. Calculate EMI (Equal Monthly Installments) and equal principal repayment methods with detailed amortization schedules and interest analysis charts.

Free online financial return calculator supporting simple interest, compound interest, annuity, investment return, and fund investment calculations. Calculate investment returns, annualized yield, maturity amount, and other key metrics quickly.

Free online salary and personal income tax calculator supporting 2025 latest tax rates. Enter monthly income, social security and housing fund rates, special additional deductions to automatically calculate tax payable, after-tax income, and annual summary.

Free online Double Color Ball lottery number generator with random, manual, smart, and multi-ticket modes. Generate lucky numbers using personal info like birthday, phone number, and ID card. For entertainment only.

Free online Chinese kinship relationship calculator. Calculate proper Chinese family titles including direct relatives, collateral relatives, and in-laws. Essential tool for Chinese New Year visits and family gatherings.

Free online fuel consumption calculator. Calculate your car's fuel economy in L/100km or MPG, cost per kilometer. Supports calculation by fuel volume or amount. Includes fuel efficiency standards for various vehicle types.

Free online perpetual calendar tool supporting Gregorian and Chinese lunar calendar date lookup, solar terms, and festival queries. Browse any year and month with lunar dates, solar terms, and traditional festivals.

Free online internet speed test tool to quickly measure download speed, upload speed, latency, and jitter. Supports multiple test modes with real-time speed curve charts.

Free online dog age calculator to accurately convert dog years to human years. Supports different dog sizes (small, medium, large, giant breeds) with life stage information, health tips, and care recommendations.

Free online cat age calculator. Accurately convert cat age to human years and vice versa. Understand your cat's life stage with detailed information about kitten, junior, adult, mature, senior, and geriatric phases.

Free online Chinese character copybook generator. Create tracing and copying practice sheets with customizable grid styles (Tianzige, Mizige, Huigongge, Jiugongge), pinyin annotations, stroke count display. Supports A4, A3, Letter, B5 paper sizes. Download high-resolution PNG images for printing. Perfect for students, calligraphy beginners, and handwriting practice.

Free online payment voice announcement tool, supporting Alipay and WeChat payment voice simulation. Enter amount to auto-generate Chinese uppercase announcement, with custom content, speed control, and volume adjustment.

Free online metronome tool supporting 40-240 BPM wide speed range, 2/4, 3/4, 6/8 time signatures, multiple sound types, and visual beat indicators.

Free online head pat emoji generator. Upload an avatar image to create cute head-pat GIF animations. Customize pat speed, amplitude, and canvas size. Download or copy generated emojis.

Free online food calorie calculator with 1000+ common foods database. Search foods, adjust servings, and analyze nutrition to help you manage your daily calorie intake.

Free online car loan calculator supporting equal principal and interest (EMI) and equal principal repayment methods. Quickly calculate monthly payments, total interest, and total car purchase costs.

Free online stock gain/loss calculator. Supports single trade P&L calculation, multi-stock portfolio analysis, target price calculation, and average cost (DCA) calculation. Input buy price, sell price, quantity and commission rates to quickly calculate stock trading P&L.

Free online work hours and wage calculator. Track daily work hours, set hourly rates, auto-calculate overtime pay with regular and overtime hour breakdown, and generate payroll summary reports.

Free online color blindness simulator. Upload images to simulate 8 types of color vision deficiencies including protanopia, deuteranopia, tritanopia, and achromatopsia. Essential for designers and developers to verify color accessibility.

Free online daily income and expense calculator. Record daily income and expenses, manage by categories, automatically calculate summaries and balances to help you manage your personal finances easily.

Free online resume builder and download tool. Fill in personal information, work experience, education background, professional skills, and generate a beautiful PDF resume with one click.

Free online PPT template download tool. Browse and download精美的 professional PowerPoint templates for business, education, project reports, graduation defense, resume, and event planning. One-click download, ready to use.

Free online emoji encyclopedia with search, category browsing, and one-click copy. Includes smileys, people, animals, food, travel, activities, objects, symbols, flags, and more.

Free online tip calculator supporting percentage or custom tip amounts, bill splitting, tax-inclusive calculation, rounding, and more. Perfect for restaurant dining, bar service, hotel stays, taxis, and any tipping scenario.

Free online inflation calculator based on historical CPI data. Calculate currency depreciation over time. Supports 12 currencies including USD, CNY, JPY, EUR, GBP, covering 12 major economies from 1980 to present.

Complete global power plug type guide. Search by country or region to find plug types, voltage, frequency, and more. Essential for international travel preparation.

Free online decision matrix tool supporting multi-option multi-criteria weighted scoring. Quantitatively compare alternatives to make more informed decisions.

Free online food shelf life reference tool covering 8 categories including meat, vegetables, fruits, dairy, seafood, grains, condiments and beverages. Check room temperature, refrigerated and frozen storage guidelines.

Free online ring size converter tool. Supports US, UK, EU, JP, CN and other international ring size standards. Enter finger circumference or diameter to automatically find the matching ring size. Perfect for shopping rings from international brands.

Free online cooking unit conversion tool supporting real-time conversion between volume (mL, L, tsp, tbsp, cup, pint, etc.), weight (g, kg, oz, lb), and temperature (°C, °F, Gas Mark) units.

Global legal adult age and age restrictions reference tool. Find age of majority, voting age, drinking age, smoking age, criminal responsibility age, and legal marriage age for countries worldwide.

Free online severance pay calculator based on PRC Labor Contract Law. Automatically calculates economic compensation, damages, payment in lieu of notice, supporting high-salary cap calculation. Helps you accurately understand your entitled severance amount.

Free online zodiac sign compatibility checker. Select two signs to instantly see love match scores, destiny analysis, and relationship advice. Covers all 12 zodiac signs, elemental matches, and personality compatibility.

Free online parent-child activity recommendation tool. Intelligently recommends suitable interactive activities based on child age, activity type, duration, and venue. Covers arts & crafts, outdoor sports, science experiments, reading stories, and more.

Free online sugar concentration converter. Supports real-time conversion between °Brix, °Plato, °Baumé, Specific Gravity (SG), °Oechsle, KMW/Babo degrees, and Potential Alcohol content.

Free online dough fermentation time calculator. Accurately estimate bulk fermentation and final proofing times based on dough type, yeast type, yeast amount, and temperature. Perfect for bread, pizza, croissant, brioche, and more. A must-have tool for home bakers.

Free online food allergen checker tool supporting 14 major allergen categories including peanuts, tree nuts, milk, eggs, soy, wheat, fish, shellfish, sesame and more. Enter ingredient list to quickly identify potential allergen risks.

Free online African name generator tool. Generate authentic African names by gender and country/region. Covers 10+ African countries including Nigeria, Ghana, Kenya, South Africa, Ethiopia, Tanzania, and more. One-click copy. Perfect for character creation, game character naming, and cultural research.

Free online Japanese name generator tool. Generate random Japanese male names, female names, and surnames with hiragana readings, romaji, and meanings. Perfect for character creation, novel writing, game naming, and creative projects.

Free online Brazilian name generator tool. Generate authentic Brazilian male names, female names, and surnames with Portuguese flair. Perfect for character creation, game character naming, writing, and creative projects.

Free online Eurozone minimum wage query tool. Covers statutory minimum wage data from 17 Eurozone countries including Luxembourg, Germany, France, Netherlands, Belgium, and more. Sort by monthly or yearly salary, with statistics for highest, lowest, and average wages. Data sourced from official government publications and regularly updated.

Free online Australian Superannuation calculator tool. Supports employer SG contributions, personal voluntary contributions, salary sacrifice, and retirement projections. Real-time calculation of total super at retirement with detailed year-by-year growth table.

Free online German Riester pension calculator. Enter your income, age and other information to quickly calculate government subsidies, tax benefits and expected returns of Riester pension. Supports basic allowance, child allowance, tax deduction and other core functions.

Free online property rental yield calculator supporting gross rental yield, net rental yield, cash on cash return, mortgage payment calculation, cash flow analysis and more. Input property price, down payment ratio, loan parameters and rental income to automatically calculate various investment return metrics.

Free online privacy information leak detection tool. Detect phone numbers, email addresses, ID card numbers, bank card numbers, IP addresses, passwords and other sensitive information in text to help identify and prevent privacy leak risks.

Free online cross-stitch thread count calculator. Automatically calculate fabric size, total stitches, and thread usage based on fabric count, pattern dimensions, and number of colors. Supports multiple fabric specifications, accurately estimates skeins per color to help you plan your cross-stitch project.

Free online glue selection tool to help you choose the right adhesive based on materials and usage. Supports plastic, metal, wood, glass, ceramic, rubber and more materials. Provides detailed comparison of water resistance, temperature range, curing time and other parameters.

Free online fabric and yarn usage calculator. Calculate fabric yardage for garments based on style and size, or estimate yarn weight needed for knitting and crochet projects. Perfect for dressmaking, sewing, knitting, crochet, and quilting projects.

Free online Japanese kana conversion tool supporting real-time conversion between Hiragana, Katakana, and Romaji. Input Japanese text for automatic detection and conversion, with batch conversion and one-click copy.

Free online bill splitting calculator for dining, travel, roommates and more. Supports equal split, percentage split and custom amount split, automatically calculates each person's share and settlement plan.

Free online luggage weight estimator. Quickly calculate your suitcase total weight with custom items, quick-add presets, baggage allowance settings, and overweight alerts. Perfect for travel, business trips, and pre-flight packing.

Free online meditation timer with 1-60 min quick presets, custom duration, interval bell, ambient sound, breathing guide and keep-awake. Helps you focus and relax during meditation.

Free online breathing exercise guide supporting 4-7-8 relaxation breathing, box breathing, 4-4-6 calming breathing, coherent breathing and more. Visual cues and gentle chimes help you relax, reduce stress, and improve focus.

Free online alcohol metabolism estimator. Calculate estimated blood alcohol concentration (BAC), peak BAC, time to sober, and driving fitness based on gender, weight, drinks, and elapsed time. For reference only; not medical or legal advice.

Free online pregnancy calculator. Quickly calculate your due date, current gestational age, pregnancy days, baby zodiac and Chinese zodiac, and important prenatal checkup schedule based on your last menstrual period and cycle length.

Free online steps and distance converter. Estimate distance from steps or steps from distance based on height, stride length and activity type. Supports walking, running, hiking and more.