Popular Tools

Random Chinese Address Generator

Quickly generate random, fake Chinese addresses complete with provinces, cities, districts, streets, and postal codes. Perfect for software testing and mock data generation.

Bond YTM Calculator

Enter the face value, market price, coupon rate, and time to maturity to accurately calculate the annualized yield to maturity (YTM) of a bond.

Least Common Multiple (LCM) Calculator

Quickly calculate the least common multiple (LCM) of two or more integers. Supports space-separated number list input.

Greatest Common Divisor (GCD) Calculator

An online tool to calculate the greatest common divisor (GCD) of multiple integers. Supports space-separated number lists.

Download Link Converter

Convert HTTP/HTTPS file URLs into dedicated download links for Thunder, FlashGet, and QQ Xuanfeng to use with various download clients.

Cube Root Calculator

Quickly calculate the cube root of any number with customizable decimal places for accurate and reliable results.

Chinese RMB Amount Converter

Accurately convert between numeric amounts and Chinese uppercase/lowercase financial characters to meet formatting standards for Chinese contracts, invoices, and banking.

PYC Decompiler

Restore Python bytecode .pyc files into readable source code for easy code auditing and learning. Supports mainstream versions.

Day of the Year Calculator

Quickly calculate the day of the year, days remaining, and convert between lunar and solar calendars.

German Address Generator

Generate random, properly formatted German addresses for software testing, data population, and privacy protection.

Random Password Generator

Customize character types and length to generate strong random passwords and secure your accounts.

VAT Calculator

Quickly calculate VAT-inclusive prices, VAT-exclusive prices, and tax amounts with this free online VAT calculator. Supports custom tax rates.

Vigenère Cipher Encoder & Decoder

Encrypt or decrypt text using the classic polyalphabetic substitution algorithm. Ideal for cryptography learning and testing.

Random Spanish Address Generator

Generate realistic, properly formatted fake Spanish addresses for development testing and data population.

Random Phone Number Generator (China & International)

Free online random phone number generator. Batch generate up to 100 virtual phone numbers with custom prefixes for US and international formats. Ideal for software testing, data population, and privacy protection.

Japanese Address Generator

Generate random fake Japanese addresses in valid formats, complete with zip codes, administrative divisions, and block numbers.

Date Difference Calculator

Accurately calculate the time difference between two dates. Get results in years, months, weeks, days, hours, minutes, and seconds. Perfect for project management, countdowns, and anniversaries.

Return on Investment (ROI) Calculator

Enter your investment amount and dates to quickly calculate ROI and annualized return, helping you make smarter investment decisions.

Random MAC Address Generator

Bulk generate random MAC addresses online with uppercase or lowercase formatting. Ideal for network testing and development.

CRC16 Checksum Calculator

Online CRC16 checksum tool to calculate 16-bit cyclic redundancy check values for text, Hex, and Base64 data to verify data integrity.