All-in-One Tools Collection

A broad collection of online tools for development, AI, design, and productivity tasks.

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Validate password against PBKDF2 derived key

Validate password against bcrypt hash

Convert between different energy units (joules, calories, kilowatt-hours, BTU, etc.)

Advanced scientific calculator with support for complex mathematical functions and expressions

Generate hash values (MD5, SHA1, SHA256, SHA512)

Calculate age from birth date in years, months, days, and total time units

Calculate body fat percentage using the US Navy method

Calculate percentages, percentage changes, and percentage relationships between numbers

Calculate daily protein needs based on activity level and goals

Generate PBKDF2 key derivation hash

Calculate target heart rate zones for different training intensities

Generate random strings with customizable character sets, length, and patterns