Popular Tools

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

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

Translate text to Morse code and vice versa. Features custom dot/dash symbols and audio playback for learning and communication.

Generate properly formatted fake US addresses for software testing, development, and data anonymization.

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.

Calculate the NTLM hash of any string. Supports plaintext, Hex, and Base64 inputs, outputting results in Hex and Base64 formats.

Generate random UK-formatted addresses with valid postcodes, cities, and streets for testing and development.

Automatically calculate important memorial milestones like the 1st and 3rd death anniversaries. Supports Gregorian and Lunar calendar conversions for easy memorial planning.

Convert pixels to inches based on screen PPI. This free two-way converter (px to in and in to px) is perfect for graphic design, printing, and front-end web development.

Enter a QQ number to estimate its market value instantly. This tool calculates the worth of a QQ account based on factors like account level, digit length, and premium number patterns.

Online AES encryption and decryption tool supporting multiple cipher modes and key lengths to ensure data security.

Calculate your Waist-to-Hip Ratio (WHR) online to assess central obesity risks and monitor your physical health.

Convert physical dimensions of ISO 216 standard paper sizes (A0-A13) to pixel values at a specified DPI/PPI for design, printing, and screen adaptation.

Generate visually identical PNG/JPG images with a brand new MD5 hash to bypass duplicate detection or force cache updates.

Enter a MAC address to instantly identify the device manufacturer and detailed physical address. Perfect for network management and security auditing.

Generate IPv4 and IPv6 addresses on demand. Supports specific public/private networks and custom CIDR ranges. Ideal for testing, development, and learning.

Two-way conversion between RGB and CIELab color spaces, providing precise color mapping for designers and developers.

Enter text and instantly calculate its CRC32 value as an eight-character uppercase hexadecimal checksum.

Generate standard arithmetic sequences using the first term, common difference, and number of terms. Ideal for math studies, programming, and data analysis.

Supports accurate conversions between 14 pressure units including Pascals (Pa), psi, bar, and atm. Ideal for engineering, meteorology, and scientific research.