All-in-One Tools Collection

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

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Convert IPv6 addresses to integers (128-bit). Supports batch conversion.

Calculate water costs based on usage and water rates

Calculate daily calorie needs based on activity level and goals

Validate Bitcoin addresses and detect address type (P2PKH, P2SH, Bech32)

Generate secure random passwords

Encode and decode text to/from Base91 format (ascii+basE91 algorithm)

Calculate waist to height ratio for health assessment

Perform basic arithmetic calculations with support for multiple operations

Calculate daily water intake needs based on weight, activity, and climate

Encode and decode HTML entities

Calculate loan payments, interest, and amortization schedule for various loan types

Encode and decode text using ROT13 substitution cipher (rotates letters by 13 positions)