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.

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.

Flight Information Lookup

Look up flight schedules, real-time status, and delay or cancellation info to help you plan departures and airport pickups.

Tourist Attraction Lookup

Enter an attraction name to instantly get its opening hours, ticket prices, ratings, and transport guide.

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 Mounting Height Calculator

Calculate the recommended mounting height from your TV size, viewing distance, and seated eye level for a more comfortable viewing experience.

TV Size and Viewing Distance Calculator

Quickly calculate the recommended TV size range based on your viewing distance and resolution.

TV Size Calculator

Enter a TV's diagonal in inches to instantly calculate the screen width, height, area, and recommended viewing distance.

University Search

Enter a university name to quickly access official information including degree levels, location, and governing bodies.

Batch Coordinate to Address Converter

Batch reverse geocode latitude and longitude coordinates into detailed addresses. Supports Excel upload and export, processing up to 500 records per batch.

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.

Time Deposit Interest Calculator

Enter the principal, term, and rate to quickly calculate the interest at maturity and total principal plus interest.

Tax Late Fee Calculator

Enter your unpaid tax amount and overdue days to quickly calculate your tax late fees online.

Precious Metals Contract Lookup

Quickly look up precious metals contract specifications, including trading units, pricing formats, and margin requirements for COMEX, LBMA, SGE, and more.

A-Shares Gainers and Losers Ranking

Calculate the price change percentage of China A-shares over a specified period and view the top gainers and losers ranking.

Chinese Precious Metals Contract Calculator

Look up Chinese precious metal contract specs (SGE & SHFE) and calculate margin requirements, PnL, and ROI online.

International Precious Metals Price Lookup

Look up real-time prices for international gold, silver, and other precious metals, and quickly calculate market value by weight and purity.

Hong Kong Stock Real-Time Quotes

Check real-time Hong Kong stock quotes and calculate your investment returns based on buy/sell prices and exchange rates.

China A-Shares Real-Time Stock Quotes

Enter a stock ticker to instantly get real-time China A-share prices, price changes, P/E ratios, and other key market data.

China Precious Metal Price Calculator

Calculate the value of gold, silver, platinum, and palladium based on real-time quotes from Chinese exchanges. Enter the metal type and weight in grams to get instant pricing.

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.

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.

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.

TTFB Test Tool

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

Snake Case & Camel Case Converter

Quickly convert between snake_case and camelCase naming, with batch processing and handling of common edge cases.

Chinese Zodiac Lookup

Enter a Gregorian birth date or year to instantly find the corresponding Chinese zodiac sign, heavenly stem and earthly branch, and the Five Elements.

Electrolyte Replacement Calculator

Estimate the sodium, potassium, and water you need to replace based on body weight, exercise duration, and sweat level — for smarter hydration.

Reaction Time Test

Measure your visual reaction time online; take multiple tries for an average to see where your reaction speed stands.

Phone Number Value Estimator

Based on digit patterns and "lucky number" culture, get a fun reference price for your phone number and see how "valuable" it is.

Vertical Text Converter

Convert horizontal text into traditional vertical layout, great for calligraphy, classical Chinese, and poster design.

Lanzou Cloud Direct Link Parser

Enter a Lanzou Cloud share link to instantly extract the real direct link for easy downloading or external linking.

Monthly Interest Payout Calculator

Quickly calculate the monthly interest payout and total interest for fixed-principal deposits. Supports various principal amounts, terms, and annual interest rates.

Curtain Fabric Calculator

Enter the window width, pleat ratio, and fabric width to quickly work out how many meters of fabric a curtain needs, so you don't buy too much or too little.

Online JSON to TOML Converter

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

Country & Language Code Reference

Look up standard language codes for countries, searchable by Chinese or English name, to quickly find codes like zh-CN and en-US.

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.

JSON to SQL Converter

Free online tool to quickly convert JSON data into SQL INSERT statements. Supports both array and object formats.

Code to Image Tool

Turn code snippets into beautiful screenshots in one click, with multi-language syntax highlighting and customizable themes.

URL Unshortener

Paste a short link to quickly reveal the original long URL. Expand shortened URLs safely and check where they redirect before clicking.

Top-Level Domain (TLD) Directory

Search 900+ top-level domain suffixes worldwide in one place, including type, managing organization, and registration restrictions.

Bulk IndexNow URL Submitter

Free online bulk IndexNow URL submitter. Instantly ping search engines like Bing and Yandex to crawl and index your new web pages faster.

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.

Word Shortcut Finder

Quickly search for common Microsoft Word keyboard shortcuts to boost your document editing efficiency.

Excel Shortcut Finder

Quickly look up common Excel shortcuts with this free online tool. Supports category filtering and keyword search to boost your productivity.

PowerPoint Shortcut Finder

Quickly find essential PowerPoint keyboard shortcuts. Search by category or key combination to boost your presentation workflow instantly.

Bulk Backlink Submitter

Bulk submit your website to high-authority platforms to quickly build backlinks and boost your SEO rankings.

Mouse Tester

Free online mouse tester to check your left, right, and middle buttons, plus scroll wheel. Quickly detect hardware issues and broken clicks.

Solid Color Image Generator

Generate solid-color images of any color and size online for free, with PNG/JPG download — great for placeholders and backgrounds.

Letter Icon Generator

Enter text to quickly generate circular or rounded-square letter icons, great for site icons, avatars, and UI elements.

Placeholder Image Generator

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

Email Icon Generator

Enter an email address to generate a custom email icon in one click, great for personal branding and websites.

TV Color Gamut Converter

Convert values between color-gamut standards (NTSC, sRGB, DCI-P3, Adobe RGB, BT.2020) online to help you make sense of the gamut specs on TVs and monitors.

Online Bar Chart Generator

Enter your data to instantly generate a clear bar chart. This free online tool supports custom labels, colors, and titles for easy data visualization.

Online Pie Chart Maker

Create custom pie charts online for free. Input your data, adjust styles, and instantly generate and download your pie graph in PNG or SVG format.

JPG to ICO Converter

Free online JPG to ICO converter. Easily convert JPG images into multi-size ICO files containing up to 6 different dimensions for favicons and desktop icons.

PNG to ICO Converter

Free online PNG to ICO converter. Instantly convert PNG images to ICO icon files with 6 standard sizes automatically bundled for favicons and Windows icons.

QQ Direct Chat Tool

Enter a QQ number to instantly generate a link that opens a direct chat window without adding them as a friend.

Mouse Click Speed Test

Measure your mouse click speed (CPS) in real-time with this free online tool. Supports multiple time intervals, perfect for gamers and click speed training.

Online Piano Keyboard

Play our free online virtual piano keyboard. Features selectable instrument tones, quick chord lookup, and MIDI/MP3 recording.

Coin Flip Simulator

Simulate a random coin flip (heads or tails) online to help you make quick decisions instantly.

Dice Roller Simulator

Simulate real dice rolls online. Supports multi-sided dice and bulk rolling, instantly displaying individual results and the total sum.

Gomoku Game

Play the classic Gomoku (Five in a Row) two-player board game online. Features undo, restart, and real-time sound effects for a fun, casual puzzle experience.

Minesweeper

Play the classic Minesweeper game online for free. Use number clues to deduce mine locations, clear the board, and exercise your logical thinking skills.

Guess the Number Game

Play the free online Guess the Number game. Guess a random number from 1 to 100, use higher/lower hints to narrow the range, and win in the fewest steps.

Spin the Wheel Generator

Create a custom prize wheel online. Spin the wheel randomly to draw winners for giveaways, games, and interactive events. Free, fast, and easy to use.

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.

Video Frame Extractor

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