Lifestyle

Free lifestyle calculators and utilities for BMI, body fat, mortgages, taxes, social insurance, score tracking, reaction tests, and decisions.

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JSON FormatterFree online JSON formatter, validator, minifier, and tree viewer with syntax highlighting. Beautify JSON, detect errors, and clean up data in your browser.

Image Compression ToolFree online image compressor for JPEG, PNG, and WebP. Adjust quality and dimensions while local browser processing protects your privacy.

PDF to Word ConverterFree online PDF to Word converter. Export .docx or .doc files with layout and image preservation, one-click conversion, and automatic file deletion.

Base64 Encoder & DecoderFree online Base64 encoder and decoder for UTF-8 text, Unicode, and images. Convert Base64 instantly with local browser processing and no signup.

Lifestyle

Free lifestyle calculators and utilities for BMI, body fat, mortgages, taxes, social insurance, score tracking, reaction tests, and decisions.

BMI Calculator

Free online BMI calculator for body mass index, healthy weight ranges, and weight category estimates using height, weight, age, and gender inputs.

BMR Calculator

Free online BMR and TDEE calculator. Estimate basal metabolic rate, daily calorie needs, and activity-based energy expenditure.

Body Fat Calculator

Free online body fat calculator using common measurement methods. Estimate body fat percentage, lean body mass, and body composition.

Blood Type Calculator

Free online blood type inheritance calculator. Predict possible child blood types from parents or possible parent combinations from a child blood type.

Mortgage Calculator

Free online mortgage calculator. Calculate monthly payments, total interest for commercial loans, provident fund loans, and combined loans.

Income Tax Calculator

2026 China personal income tax calculator. 7-level progressive tax rates, social insurance and special deductions auto-calculation.

Social Insurance Calculator

China social insurance and housing fund calculator for pension, medical, unemployment, injury, maternity, and provident fund contributions.

Decision Wheel

Free online decision wheel and choice spinner. Enter options, spin the wheel, and pick a random result for food, games, raffles, or quick decisions.

Scoreboard

Free online scoreboard tool, add multiple players, custom scoring, real-time ranking. Perfect for board games, parties, sports and competitions.

Scientific Calculator

Free online scientific calculator with trigonometric functions, logarithms, exponentials, factorials, powers, and degree/radian mode

Random Selection Tool

Free online random picker tool for raffles and draws. Uses cryptographic random algorithm for fairness, with draw animation and duplicate options.

Chinese Kinship Calculator

Free online Chinese kinship title calculator. Enter a relationship chain to find the correct family title by lineage, gender, and birth order.

ID Card Age Calculator

Free online ID card age calculator. Batch parse Chinese ID numbers, calculate ages, view statistics including age distribution, gender ratio. Supports CSV export.