Record daily weight changes and provide visual charts to display weight trends. Supports data storage, edit/delete, statistical analysis and other functions to help you scientifically manage your weight.

Professional date calculation tool that can calculate the difference between two dates and find future dates from a specified date. Supports multiple time unit displays and provides millisecond-level precision calculations.

Professional online piano simulator with keyboard and mouse support. Features 14 white keys and 10 black keys covering two octaves. Provides recording, playback, and replay functionality with realistic piano sound and excellent user experience.

Professional BMI music licensing fee calculator for businesses. Calculate estimated annual licensing fees based on venue type, capacity, music usage type, and frequency. Provides detailed breakdown and important disclaimers.

Professional layoff compensation calculator that calculates compensation based on city coefficients and work experience. Supports major cities nationwide, provides real-time calculation and detailed breakdown to help you understand potential compensation amounts.

Professional AI model training power consumption estimation tool. Calculate total power consumption, electricity costs, carbon emissions, and GPU power usage. Provides model presets and real-time calculation with comparison analysis.

Visualize your life journey through an intuitive grid layout, helping you understand time flow and plan your future wisely. Supports year view and month view switching, uses different colors to mark past, current, and future time, providing detailed statistics and explanations.

Comprehensive guide to SAE J3016 autonomous driving levels with detailed definitions, responsibilities, and use cases. Provides interactive search and filtering capabilities for understanding automation levels from L1 to L5.

Smart calculation of annual car maintenance costs for fuel and electric vehicles with detailed cost breakdown and comparison analysis. Supports fuel consumption, electricity consumption, insurance, maintenance and other cost calculations to help users make informed car purchase decisions.

Traditional ancient-style fortune stick tool with beautiful bamboo tube design, 70% chance of excellent fortune to bring you good luck. Includes classical poetry-style stick content and detailed interpretation, automatically records draw history.

Calculate retirement savings needed based on age and city, assess financial freedom level. Provides detailed cost breakdown analysis to help users plan their financial future.

Professional screen size calculator that automatically calculates screen width and height based on diagonal size and aspect ratio. Supports common device size references including monitors, TVs, laptops and other device types.

Rich emoji picker with six categories including smileys, animals, food, travel, objects and symbols, supporting search and quick copy functionality.

Experience the daily life of a goblin in Langlang Mountain, complete various tasks to improve attributes, make choices in random events, and ultimately reach different endings.

Fun reincarnation simulator to experience different life paths and explore infinite possibilities. Randomly generates reincarnation location, family background, wealth status, and more for entertainment and fun.

Professional earthquake magnitude query and science education platform to help you understand earthquake levels, intensity standards and related safety knowledge.

Accurately calculate PayPal transaction fees for personal and business accounts, providing detailed fee breakdowns and net amount calculations.

Quickly query garbage classification, learn environmental knowledge, build a green home together. Supports fuzzy search with detailed classification descriptions and disposal methods.

A relaxing and fun jumping game to help relieve stress and improve mood. Supports keyboard and mouse controls with local data storage.

Professional project progress management tool with milestone tracking, risk alerts, progress visualization and more.

Efficiently manage your tasks with category support, priority levels, deadline settings, statistics charts and smart reminders.

Scientifically calculate daily calorie needs based on age, gender, weight, height, and activity level, providing personalized nutrition advice and macronutrient distribution.

Professional international tariff cost calculation tool to help you quickly estimate the impact of tariff policy changes on product costs, providing reference for international trade decisions.

Accurately calculate personal income tax with social insurance deductions and detailed tax brackets. Based on the latest tax law, providing professional salary calculation services.

Calculate your work value in real-time, make every second count. Based on monthly salary to calculate earnings per second, providing dazzling effects and emotional value to motivate work enthusiasm.

Automatically calculate suitable clothing sizes based on height and weight, supporting multiple international standards comparison, providing professional size advice and purchase guidance.

Split text by specified characters with custom delimiters, replace separators and multiple formatting options, providing convenient text processing functionality.

Real-time validation and testing of regular expressions with rich examples and detailed explanations, supporting multiple regex flags and match result display.

Professional JSON data comparison tool with automatic formatting and highlighted differences, supporting multiple comparison modes and detailed difference analysis.

Professional JSON data formatting, compression, and validation tool with syntax highlighting and error detection, providing rich formatting options.

Quickly compare differences between two text segments with real-time preview and highlighting to help you identify text changes efficiently.

Provides secure and reliable text encryption and decryption functionality with custom keys to protect your private information.

Powerful online drawing tool with multiple brush types, color selection, save records and download functionality. Provides brush, highlighter, eraser tools with undo/redo and work management.

Professional 1D barcode generation tool supporting multiple barcode formats (EAN, UPC, Code128, Code39, etc.) with custom styles and batch generation features.

Quickly generate QR codes in various formats with custom styles and batch download. Provides QR code generation services for URLs, text, contact information and more.

Manage your favorite websites with batch operations and local storage, providing URL validation.

Enter your birth date to query your constellation and learn about personality traits, cultural stories, and traditional meanings.

Enter your birth date to query your zodiac sign and learn about personality traits, cultural stories, and traditional meanings.

Comprehensive Excel keyboard shortcuts reference with detailed usage scenarios, practical tips, and learning recommendations.

Provides detailed explanations, syntax usage, and practical examples of common Excel formulas to help you quickly master Excel formula techniques.

Comprehensive Vim command reference manual with detailed usage, parameter descriptions, and practical examples. Features search functionality for quick lookup.

Comprehensive Git command reference manual with detailed usage, parameter descriptions, and practical examples. Features search functionality for quick lookup.

Comprehensive Linux command reference manual with detailed usage, parameter descriptions, and practical examples. Features search functionality for quick lookup.

Professional timezone and time format conversion tool, supporting multiple time formats and timestamp conversion with real-time current time display.

Scientifically calculate child rearing costs from birth to age 22, helping parents with financial planning, including analysis of living, education, medical and other costs.

Scientifically assess the height of children aged 3-17 years, based on WHO standards and provide health advice.

Scientifically assess the weight of children aged 3-17 years, based on WHO standards and provide health advice.

Convert dog age to human years and get professional pet care advice, including nutrition, health care, exercise training and emotional care guidance.

Scientifically assess the height of babies aged 1-3 years, based on WHO standards and provide health advice.

Scientifically assess the weight of babies aged 1-3 years, based on WHO standards and provide health advice.

Provide color palette tools to help users select suitable color schemes.

Safe stock trading simulation platform for learning investment knowledge and experiencing stock market trading.

Scientific personality test based on MBTI and Big Five theory to help you better understand yourself and others, providing detailed personality trait analysis and career advice.

Visual hypnotic tool with breathing guidance and relaxation techniques to help you relax and fall asleep gradually. Features pulsing animations, breathing rhythm guidance, ambient sound effects, and timer functionality.

Professional sleep aid tool that helps users fall asleep quickly through sheep counting, featuring starry background and relaxing sound effects.

Light and fun mini-game to relax during work breaks, watch fish swimming freely.

Professional carbon emission calculation tool supporting personal and corporate carbon footprint calculation, providing carbon neutrality knowledge and emission reduction suggestions.

Professional mortgage calculation tool supporting various calculation methods like equal monthly payments and prepayments.

Full-featured Markdown editor with real-time preview and syntax highlighting support.

Accurately calculate large language model Token consumption, estimate API call costs and processing time.

Query province and city information by license plate number, supports special vehicle identification.

Detailed license plate origin query tool providing accurate geographic location and plate information.

Based on the 90-minute sleep cycle theory, scientifically calculate optimal sleep and wake times. Provides two calculation modes: set wake up time to calculate optimal sleep time, or calculate optimal wake up time based on current time, helping you get quality sleep.

Calculate your recommended sleep duration based on American Academy of Sleep Medicine (AASM) guidelines. Provides optimal sleep time ranges for different age groups and practical suggestions to help improve sleep quality.

Scientifically manage daily water intake, develop healthy drinking habits, and protect your health. Provides water intake level selection, health standard reference, progress tracking and visual trend analysis.

Create music by clicking on notes, record and play your own compositions. Supports multiple instruments with recording, playback and save functionality.

Write letters to your future self and receive warm greetings from the past at designated times.

Fun work quantification tool that displays and statistics work results in an interesting way.

Scientifically calculate body mass index, assess health status, and provide professional health advice.

Provides quick online accounting tools for convenient user operations and management.