Life

tools · 22 tools

Finance

Salary Tax Calculator 工具图标 Salary Tax Calculator

Compute take-home pay, social insurance and individual income tax with annual progressive rates, bonus included.

Mortgage Calculator 工具图标 Mortgage Calculator

Compare equal-installment vs equal-principal repayment; output monthly payment, total interest and schedule.

Query

ID Card Info Extractor 工具图标 ID Card Info Extractor

Validate an ID card and extract birth date, gender, age, region, zodiac and constellation.

Phone Number Lookup 工具图标 Phone Number Lookup

Detect carrier and number-segment type, validate format, with batch lookup.

Unified Social Credit Code 工具图标 Unified Social Credit Code

Validate a Unified Social Credit Code per GB 32100-2015; parse the registering department and region.

Bank Card Validator 工具图标 Bank Card Validator

Validate a card number with the Luhn algorithm and detect UnionPay, Visa, Mastercard and more.

License Plate Lookup 工具图标 License Plate Lookup

Resolve a license plate to its province and issuing city using a built-in nationwide plate table; local lookup.

Date & Time

Lunar/Solar Converter 工具图标 Lunar/Solar Converter

Convert between solar and lunar dates both ways, with ganzhi, zodiac and traditional festivals.

Date Difference 工具图标 Date Difference

Compute days, workdays and months between two dates, with add/subtract.

Countdown Timer 工具图标 Countdown Timer

Set a target date and show live remaining days, hours, minutes and seconds; track multiple events.

Timezone Converter 工具图标 Timezone Converter

Convert a date-time from one zone to major world zones; computed locally via Intl, no network.

Health

BMI Calculator 工具图标 BMI Calculator

Compute BMI from height and weight, classify underweight/normal/overweight/obese, with healthy range tips.

Retirement Pension Estimator 工具图标 Retirement Pension Estimator

Roughly estimate retirement age, retirement year and monthly pension by current pension formulas; for reference only.

More

UUID Generator 工具图标 UUID Generator

Batch-generate UUID v4 with dashed/lowercase/uppercase formats; copy all at once.

UUID v7 & Random MAC 工具图标 UUID v7 & Random MAC

Generate time-sortable UUID v7 and random MAC addresses (locally administered), for distributed IDs and masking.

Full/Half Width Converter 工具图标 Full/Half Width Converter

Convert between full-width and half-width characters, fixing mixed-width text in Chinese layouts.

Pomodoro Timer 工具图标 Pomodoro Timer

Focus/break timer with adjustable duration; start, pause and reset; pure frontend, no login.

Number to Words 工具图标 Number to Words

Spell out numbers in English (integers and decimals up to trillions); handy for invoices and copy.

LED Text 工具图标 LED Text

Generate a neon scrolling LED text effect with adjustable color, speed and size; pure-frontend CSS animation.

Todo List 工具图标 Todo List

A locally-saved todo list with add/delete, done-state and clear; data stays in your browser.

WeChat Multi-Open Generator

Generate a WeChat multi-open batch file (.bat) to launch several instances at once; generated locally, never uploaded.

Keyboard Tester 工具图标 Keyboard Tester

Capture key presses and show key, code, keyCode and modifier states; handy for debugging keys.