Crafted with Care,Built for Every Tool

CJK字符Unicode转换

中日韩字符与Unicode码点双向转换工具，支持多种输入格式，解决编程与文本处理中的编码问题。

UTF-8 BOM Checker

Detect and remove BOM signatures from UTF-8 files in one click. Fix parsing errors in PHP and optimize file compatibility.

Bulk File MD5 Changer

Efficiently change file MD5 hashes in bulk to generate brand new hash codes, solving issues like duplicate file checks and upload restrictions.

Bulk MD5 File Checker

Bulk calculate MD5 hash values for files to verify integrity and consistency. Supports simultaneous multi-file processing to ensure data security.

Batch File Encoding Checker

Batch detect text file encoding formats to fix garbled text. Supports common types like UTF-8 and GBK.

Serpent Encryption & Decryption Tool

A text encryption and decryption tool based on the Serpent algorithm, supporting multiple key lengths and operation modes.

CAST Algorithm Encryption and Decryption

A symmetric encryption and decryption tool based on the CAST-128 algorithm. Supports text and Base64 encoding conversion to ensure secure data transmission.

Blowfish Encryption & Decryption Tool

Encrypt or decrypt data online using the Blowfish symmetric algorithm to ensure privacy and security. Supports multiple encoding formats including UTF-8, Base64, and Hex.

TripleDES Encrypt & Decrypt

Provides TripleDES encryption and decryption features, supporting common modes like CBC/ECB and PKCS padding to protect sensitive data.

Pinyin and Stroke Order Copybook Generator

Create printable Chinese practice sheets with automatic pinyin, stroke-by-stroke order, tracing, and blank writing grids.

火车时刻与余票查询

输入出发站、到达站和出行日期，查询列车时刻与余票快照；实际开行与售票请以 12306 和车站通知为准。

Chinese Word Tracing Worksheet Generator

Create printable Chinese handwriting worksheets with model text, tracing practice, and blank writing grids

Headphone Tester Pro

Test headphones with microphone loop: frequency response sweep curves, channel balance & phase, THD distortion measurement, save and export test reports.

Flight Information Lookup

Check flight schedules, real-time updates, delays, and cancellation information to help you plan your departure and airport pickup times.

Tourist Attraction Lookup

Enter an attraction name to instantly get opening hours, ticket prices, ratings, and travel guides.

Produce Price Lookup

Check real-time wholesale produce prices across major agricultural markets in China. Compare daily prices to make smart buying, selling, and grocery shopping decisions.

Recipe Finder

Enter ingredients or dish names to quickly find matching recipes, step-by-step instructions, and ingredient lists.

TV Mount Height Calculator

Calculate the recommended TV installation height based on screen size, viewing distance, and seated eye level for comfortable viewing.

Days Lived Calculator

Calculate exactly how many days you've lived since your date of birth. This free online calculator supports custom start and end dates for fast, accurate results.

Business Days Calculator

Accurately calculate the number of business days by automatically excluding weekends and custom holidays.

Week of the Year Calculator

Quickly and accurately calculate what week of the year it is today.

World City Time

Real-time global city time tracker and time zone converter

Beijing Time Sync

Online tool to sync Beijing Time and UTC, accurately calculating the time difference.

Sunrise and Sunset Times by City

Accurately calculate sunrise and sunset times, as well as daylight hours, for any location worldwide. Supports 30 years of historical data.

Random Date Generator

Accurately generate random dates within a specified range, ideal for software testing and data simulation.

Costa Rica Teachers' Day: Date, History & Traditions

Find the date, origins, and traditions of Costa Rica Teachers' Day to explore local cultural customs.

El Salvador Teachers' Day: Date & Information

Look up the exact date, historical background, traditions, and significance of Teachers' Day in El Salvador with our authoritative holiday guide.

CNAPS Code to Bank Branch

Enter a 12-digit CNAPS code to identify the bank branch, bank, region, address, phone number, and logo.

Bank CNAPS Code Lookup

Find Chinese bank branch CNAPS codes, addresses, and phone numbers by bank, card number, location, or keyword.

World Currency Symbols and Names

Look up currency names and commonly used symbols by country to identify monetary units on bills, quotes, and documents.

Interest Rate Change Repayment Calculator

How will an interest rate adjustment affect your monthly payment and total interest? Enter your original loan details and new rate to compare amortized and declining-balance repayments.

Bank Deposit Interest Calculator

Calculate bank deposit interest online for demand, time, and notice deposits. Enter your principal, interest rate, and term to instantly see your interest earned and total balance.

Compound Interest Calculator

Calculate compound interest, present value, and future value online. Enter your principal, interest rate, term, and compounding frequency to get instant results.

Technical Indicator Query

Calculate technical indicators by asset and timeframe: MACD, RSI, Bollinger Bands, EMA/SMA moving averages, KDJ, CCI, ATR, and more. Supports global stocks, futures, forex, and cryptocurrencies.

品种代码查询

按名称或关键词搜索全球股票、期货、外汇、加密货币、贵金属等的合约代码（symbol），可直接用于历史K线查询。

Historical K-Line Lookup

Query historical candlestick data from major global markets (open, high, low, close, volume) across stocks, forex, futures, precious metals, cryptocurrencies, indices and more, with support for minute/hourly/daily/weekly/monthly timeframes.

Iron Deficit Calculator

Estimate your total elemental iron requirement based on body weight and the difference between current and target hemoglobin.

Adult Height and Weight Chart (2026 Edition)

Find a reference weight for your height and use BMI to check your healthy weight range

Calories Burned Calculator

Estimate calories burned based on your weight, activity, and workout duration

Child Height and Weight Chart (2026)

Look up reference height and weight ranges by age and sex to understand your child’s growth and track changes over time.

Diabetes Meal Planner Calculator

Estimate your daily calorie needs and macronutrient targets based on your personal profile to support diabetes meal planning.

Child Vaccination Schedule

Generate a personalized 0-6 year child vaccination schedule by birth date. Easily track your baby's immunization plan and never miss a shot.

Progesterone Normal Range Checker

Check normal progesterone levels by pregnancy week and get a standard reference chart.

GFR Calculator

Quickly calculate Glomerular Filtration Rate (GFR) based on the CKD-EPI formula to assess kidney health.

TDEE Calculator

Calculate your Total Daily Energy Expenditure (TDEE) based on the Mifflin-St Jeor equation to get scientific calorie recommendations for fat loss and muscle gain.

ICP 备案查询

按域名查询 ICP 备案参考信息，查看备案主体、备案号、网站名称、备案状态、审核时间及分页记录。

Domain Checker

Check domain DNS records and HTTP status codes online to quickly diagnose website connectivity and network issues.

Baidu Spider IP Checker

Verify if a visiting IP address belongs to a genuine Baidu Spider. Easily identify fake crawlers and validate bot identities with this free online checker.

SSL Certificate Checker

Free online SSL certificate checker. Verify website SSL validity, view issuer details, and check expiration dates instantly.

2FA Code Generator & Validator

Generate and verify two-factor authentication (2FA) codes online to secure your accounts.

ID Card Face Match Verification

Verify if an ID card photo and a real-life photo belong to the same person using AI facial recognition technology.

IPv6 Location Lookup

Accurately find the geolocation of any IPv6 address, including country, city, and ISP details.

IP Risk Profile Checker

Check the security risk profile of an IP address, including key threat intelligence like threat types, reputation scores, and geolocation.

Street-Level IP Address Geolocation Tool

Accurately look up the street-level location and ISP details of an IP address. Supports both IPv4 and IPv6 parsing.

Vertical Arithmetic Worksheet Generator

Generate printable vertical addition, subtraction, multiplication, and division worksheets with configurable ranges and answers.

立体图形分类游戏

观察面、棱与滚动特点，分类长方体、正方体、圆柱和球

上下左右位置游戏

在九宫格中辨认参照物的上面、下面、左边和右边

比大小互动天平

调节天平两侧数字，观察倾斜方向并判断大于小于或等于

100以内数与计数器

拨动十位和个位，结合十进制积木理解100以内数的组成

20以内进位与退位练习

随机练习20以内进位加法与退位减法，并查看方法提示

看图列式互动练习

根据物体分组与拿走过程选择答案，建立图像和算式的对应

数的分与合演示器

调整总数与部分数，观察分解图、圆点和加减算式的联系

认识人民币互动练习

点击人民币完成付款，练习元角换算、凑金额和找零

Online JSON to Excel Converter

Convert JSON arrays into downloadable CSV tables for easy viewing and editing in Excel

Excel to JSON Converter Online

Convert copied Excel cells into row-based JSON objects or arrays

WeChat Official Account API Debugger

Build and validate common WeChat Official Account API requests in your browser, with URL, JSON preview, and copyable curl commands.

HTML Table Generator

Create HTML table code visually with drag-and-drop. Merge cells, customize styles, and copy the code in one click.

CSS3 Code Generator

Visually customize CSS3 effects like border radius, shadows, and gradients. Generate code in real time and apply it to your website in seconds.

Online JSON to TOML Converter

Quickly convert JSON data to TOML format. A free online tool perfect for migrating configuration files.

国家语言代码对照表

查询各国语言的标准缩写代码，支持中文名称、英文名称搜索，快速获取如 zh-CN、en-US 等代码。

XPath Online Tester

Test XPath expressions right in your browser and see matches instantly — great for web scraping, data collection, and front-end debugging.

Online TOML to JSON Converter

Free online TOML to JSON converter. Easily convert TOML configuration files into JSON format for seamless cross-platform deployment and API integration.

PDF to EPUB Converter

Convert text-based PDFs to reflowable EPUB ebooks with optional title, author, and language metadata.

智能作业批改

上传单张K12作业或试卷图片，查看逐题对错、作答区结果、错因说明与完成统计。

企业关系图谱查询

输入企业名称、统一社会信用代码、注册号或曾用名，查询服务返回的企业关系信息；结果仅作信息参考，不构成法律、投资、授信或尽调结论。

商标查询

按关键词检索商标公开信息，查看匹配记录、申请号、国际分类、申请日期、申请人及公开状态等参考资料。

Online PDF Viewer

Open and read local PDF files in your browser with page navigation, fit modes, document metadata, printing, and download.

Tender & Bidding Search

Quickly search public tender notices and contract award results nationwide. Supports multi-dimensional filtering.

Essay Paper Generator

Customize and generate blank A4 essay paper PDFs online. Features custom word count markers and headers for printable writing and manuscript paper.

Funnel Chart Generator

Generate custom funnel charts online to visually track conversion rates and analyze process flows.

Excel Function Lookup

Quickly look up common Excel functions by category. View syntax, parameters, and practical examples to build formulas faster.

图片广告检测

上传图片，辅助检测水印、二维码、条形码、小程序码等常见广告特征与置信度。

图片篡改风险检测

上传单张图片，辅助识别疑似 PS、拼接或局部修改，并查看置信度、疑似区域和热力图。

Traditional Japanese Colors & Color Palette

Explore traditional Japanese color names and values for websites, posters, presentations, and interior color schemes.

Traditional Chinese Color Palette

Explore over 500 traditional Chinese color names, hex codes, and color schemes for design, home decor, and social media content.

Solid Color Image Generator

Free online solid color image generator for any color and size, supports PNG/JPG download, perfect for placeholder images and background creation.

Letter Icon Generator

Input text to quickly generate circular or rounded square letter icons suitable for website icons, avatars, UI elements.

Placeholder Image Generator

Quickly generate custom placeholder images with specific sizes, colors, and text. Perfect for web prototyping, documentation, and frontend development.

邮箱图标生成器

输入邮箱地址，一键生成专属邮箱图标，适合个人品牌和网站使用。

TV Color Gamut Converter

Convert values between different color gamut standards (NTSC, sRGB, DCI-P3, Adobe RGB, BT.2020) online, helping you understand color gamut parameters of TVs and displays.

在线俄罗斯方块游戏 - 经典消行与等级挑战

经典十列二十行俄罗斯方块，支持键盘、触屏和等级加速。

在线中国象棋游戏 - 双人对弈与简单人机

在线中国象棋棋盘，支持双人对弈、简单人机、提示和悔棋。

在线贪吃蛇游戏 - 多难度与触屏操控

经典贪吃蛇玩法，支持三档速度、障碍、触屏和本地最高分。

在线三阶魔方游戏 - 打乱、转动与步骤还原

在线转动三阶魔方六个面，支持打乱、撤销和历史还原。

在线七巧板游戏 - 自由拼图与创意训练

拖动七块标准拼板，自由旋转、翻转和组合图形。

Play Sokoban Online

Play the classic Sokoban puzzle game online with multiple levels, keyboard and touch controls, move and push tracking, unlimited undo, and instant restarts.

Online Sliding Number Puzzle

Play a sliding number puzzle online with solvable 3×3, 4×4, and 5×5 boards, move and time tracking, keyboard controls, and multi-step undo.

Play 2048 Online

Play the free 2048 number puzzle online with arrow keys, WASD, swipe controls, undo, live scoring, and a locally saved high score.

Online Maze Generator

Create reproducible mazes by size, algorithm, exit layout, and seed. View the shortest path or distance heatmap, play online, and download as SVG.

屏幕录制专业版

专业屏幕录制：摄像头画中画、系统声+麦克风混音、4K/60fps、定时分段与多录制管理，本地处理不上传。

Screen Recorder

Record your computer screen online for free with no watermarks and export high-quality HD videos.

Adjust Video Volume

Precisely adjust the audio track volume of your video files with support for ±24dB lossless adjustments.

AI Video Style Transfer

AI-powered video art style transfer tool with multiple special effect filters.

Video Speed Controller

Precisely adjust video playback speed with support for 0.1x to 4x processing.

Rotate Video

Accurately adjust video orientation and fix portrait to landscape misalignment.

Reverse Video Tool

Precise frame-level video reverser supporting multiple formats and audio retention.

Mute Video Tool

Professionally remove audio tracks from videos to create silent videos.

Video Merger

Merge multiple video clips into a single video while keeping the original quality.