Crafted with Care,Built for Every Tool

CJK to Unicode Converter

A bidirectional converter for CJK characters and Unicode code points. Supports multiple input formats to solve encoding issues in programming and text processing.

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.

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.

Rabbit Stream Cipher Encrypt & Decrypt Tool

Free online Rabbit stream cipher tool for fast text encryption and decryption. Supports 128-bit keys and 64-bit IVs to quickly secure sensitive data.

证件照尺寸大全查询器

查询常见证件照片标准尺寸，包括像素、毫米、用途等，方便快速制作合规证件照。

童鞋尺码对照表

提供中欧英美儿童鞋码对照查询，输入脚长快速匹配对应尺码。

童装尺码对照表

提供中国、欧美、日韩等国际童装尺码快捷对照查询。

配速计算器

根据跑步距离与时间，精准计算平均配速及分段配速。

Name Tracing Worksheet Generator

Enter your child's name to instantly generate a custom Chinese character tracing worksheet with Pinyin, stroke order, and Tianzige grids.

English Italic Handwriting Worksheet Generator

Create custom English italic handwriting worksheets online. Instantly generate printable Italianno tracing copybooks for calligraphy and signature practice.

Hengshui Style English Handwriting Worksheet Generator

Easily generate custom Hengshui style English handwriting practice sheets online. Supports letter tracing and multiple export formats for printing.

Classical Chinese Copybook Generator

Instantly format classic Chinese texts to generate printable handwriting practice templates with multiple grid styles and export options.

看拼音写词语生成器

专为小学一二年级设计的拼音识字练习页生成工具，支持预设词库与自定义输入，可一键导出高清打印版。

活了多少天计算器

通过出生日期计算已活天数，支持任意起止日期，快速得出精确结果。

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.

病假工资计算器

根据工龄与月工资，快速计算病假工资及发放比例。

RMB Unit Converter

Free online RMB unit converter supporting mutual conversions between Yuan, Jiao, and Fen.

Personal Pension Calculator

Estimate your future retirement pension income with customizable parameters.

Rental Yield Calculator

Quickly calculate real estate rental yield and evaluate property investment value.

Test Credit Card Number Generator

Generate test credit card numbers that pass the Luhn algorithm. Supports major networks like Visa and MasterCard.

Invoice Verification

Verify VAT invoice authenticity. Enter the invoice code, number, and key details to instantly get validation results.

Loan Affordability Calculator

Calculate your maximum loan amount and monthly payments based on your income and debts to help budget for a new home or car.

Combination Mortgage Calculator

Calculate monthly payments and interest for mixed HPF and commercial mortgages, complete with detailed amortization schedules.

Year-End Bonus Tax Calculator

Accurately calculate your year-end bonus income tax. Supports both separate and comprehensive tax methods to instantly determine your after-tax income.

孕酮正常值参考表查询器

根据孕周查询孕酮正常值，提供标准对照参考。

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.

Ovulation Calculator

Automatically calculate your ovulation day and fertile window based on your menstrual cycle to help you find the best time to conceive.

Fetal Gestational Age Chart

Quickly check fetal gestational age using ultrasound measurements like Crown-Rump Length (CRL) and Head Circumference (HC). Covers all trimesters to help you track fetal development.

Gestational Age Calculator

Accurately calculate fetal gestational age using your Last Menstrual Period (LMP) or ultrasound measurements (CRL, BPD, HC, FL) to estimate your due date and track fetal development.

Fetal Weight Chart by Gestational Age

A fetal weight reference tool based on NICHD Asian singleton data, helping expectant parents quickly assess their baby's growth.

Fetal Growth Chart

A fetal development reference tool based on authoritative consensus, providing standard ranges for key parameters like BPD and head circumference by gestational week.

Daily Water Intake Calculator

Scientifically calculate your daily water needs based on weight and activity level to create a personalized hydration plan and maintain optimal water balance.

域名检测器

检测域名解析记录与HTTP状态码，快速诊断网站连通性。

百度蜘蛛识别查询工具

识别来访IP是否为百度蜘蛛爬虫，验证爬虫身份真伪

SSL证书检测器

检测网站SSL证书信息与有效性，查看颁发者与到期时间。

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.

TTFB Test Tool

Measure your server's Time to First Byte (TTFB) to help developers optimize website performance and SEO rankings.

Subtraction Chart Generator (Up to 10)

Quickly generate a subtraction chart up to 10. Supports printing and PDF downloads.

Voltage Unit Converter

Quickly convert voltage units like volts, millivolts, and kilovolts online with support for batch calculations.

Addition Table Up to 10

Provides an addition table up to 10 in image format, available for printable download.

Printable Multiplication Table

Generate and download a free high-resolution 1-9 multiplication table chart for easy printing.

Math Facts Generator

Automatically generate elementary math practice problems for addition, subtraction, multiplication, and division. Supports mixed calculations up to 10, 20, and 100.

Torque Unit Converter

Quickly and accurately convert between different torque units, including common units like Newton-meters and foot-pounds.

Resistor, Capacitor & Inductor Unit Converter

Online unit conversion tool for resistors, capacitors, and inductors.

Illuminance Unit Converter

Quickly convert illuminance units including lux (lx), foot-candles (fc), and phots (ph).

Current Unit Converter

Quickly and accurately convert current units like amps and milliamps.

IndexNow批量URL提交工具

批量提交URL至IndexNow，通知必应等搜索引擎快速抓取与索引。

ADB命令参考表

提供Android调试桥常用命令速查，涵盖设备连接、应用管理等指令。

Gzip编码解码工具

Gzip压缩与解压，支持文本Base64编码输出。

Favicon 图标获取器

抓取任一网址的favicon图标，支持高清预览与直接下载

蜘蛛抓取模拟器

模拟搜索引擎蜘蛛抓取网页，查看抓取状态与页面源码。

网页关键词密度检测器

检测网页关键词出现频率与密度，辅助SEO优化，提升搜索排名。

百度主动推送工具

向百度主动提交网站链接，加速页面收录与更新。

网页源代码查看器

查看并分析任意网页的HTML源码，辅助前端开发与调试。

JavaScript运算符优先级查询器

快速查看JavaScript运算符优先级与结合性，避免运算逻辑错误

Excel函数查询器

提供Excel常用函数分类速查，展示语法、参数与实战示例。

Word快捷键查询器

快速查询Microsoft Word常用快捷键，提升文档编辑效率。

Excel快捷键查询器

快速查询Excel常用快捷键，支持分类筛选与关键词搜索。

PPT快捷键查询器

快速查询PowerPoint常用快捷键，分类检索即查即用

超级外链批量发布工具

批量发布外链到高权重平台，快速提升网站SEO排名

鼠标测试器

测试鼠标按钮、滚轮与点击，快速检测硬件问题。

VCF转Excel转换器

将vCard联系人文件转换为Excel格式表格。

Bing网址提交工具

快速提交网站URL至Bing搜索引擎，提升收录与索引效率。

Class Schedule Maker

Customize themes and class periods, generate high-resolution class schedules in one click, and export for printing.

电子白板涂鸦画板

自由涂鸦的在线电子白板画板，支持多色彩绘制、擦除与图片导出。

网页配色方案生成器

生成网站配色方案，输出颜色代码与搭配建议。

圆形图片生成器

快速将图片裁剪为圆形头像或图标，支持透明背景和自定义背景色。

WEB安全色对照表大全

查询216种Web安全色名称、十六进制代码和RGB值对照表。

GIF Merger

Merge multiple GIFs into a single, continuous animated file online. Fast, free, and easy to use.

GIF Cropper

Accurately crop GIF images online. Select specific areas, preserve animation quality, and export quickly.

GIF Splitter

Split GIFs frame by frame online and quickly export high-quality static images.

GIF Compressor

Compress GIFs online for free. Smartly reduce GIF file size while maintaining clear image quality and smooth animations.

GIF Maker

Convert images or videos to animated GIFs online for free. Supports custom cropping, frame rate adjustments, and secure local processing.

抛硬币模拟器

模拟抛硬币随机正反面，帮助快速决策

掷骰子模拟器

模拟真实掷骰子，支持多面骰和批量投掷，即时显示点数总和。

五子棋游戏

经典五子棋双人对弈，支持悔棋重开，实时音效，益智休闲。

扫雷游戏

经典扫雷游戏，通过数字线索推理地雷位置，锻炼逻辑思维。

猜数字游戏

在1-100内随机猜数字，根据系统提示缩小范围，挑战最少步数。

幸运大转盘生成器

创建自定义奖品转盘，随机旋转抽取幸运奖项，适用于活动互动。

QQ号码价值评估查询器

输入QQ号码即可评估其市场价值，综合等级、位数、靓号等因素估值。

Group Ship Name Generator

Automatically generate creative group ship names and character pairings effortlessly.

Acrostic Poem Generator

Generate acrostic or telestich poems in one click. Supports custom text and poetry styles.

屏幕录制器

免费无水印在线录制电脑屏幕，输出高清视频。

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.

Video Frame Extractor

Accurately extract keyframes or capture still images at specific timestamps from your videos. Supports multiple export formats.