Popular Tools

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.

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.

Greatest Common Divisor (GCD) Calculator

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

Cube Root Calculator

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

Download Link Converter

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

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.

Day of the Year Calculator

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

PYC Decompiler

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

Random Password Generator

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

Vigenère Cipher Encoder & Decoder

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

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.

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.

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.

Random Spanish Address Generator

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

RGB to HSB Converter

Two-way RGB and HSB/HSV color code converter supporting multiple input formats. Ideal for designers and developers.

Random MAC Address Generator

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

Japanese Address Generator

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

Stamp Duty Calculator

Calculate the payable tax for various contracts, documents, and account books based on the Stamp Duty Law. Supports both proportional and fixed-rate tax calculations.