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Overview
Keisan (Calculate) is a developer-focused calculation tool that goes beyond basic math. Features include byte/bit conversions, date/time calculations, regex testing, hash generation, and common programming utilities.
The Challenge
Developers constantly need quick calculations - converting bytes, calculating time differences, testing regex patterns. Switching between multiple tools breaks flow and reduces productivity.
The Solution
Created an all-in-one calculation suite with programmer-friendly features like base conversions, bitwise operations, time zone calculations, and cryptographic hash generation.
Impact
20+
Tools
Calculation utilities
5K+
Calculations
Calculations performed
200+
Users
Active monthly users
10min
Saved
Average time saved per session
Technology Stack
Frontend
Next.js 14ReactTypeScriptTailwind CSS
Utilities
date-fnsbig.jscrypto-js
Backend
SupabasePostgreSQL
Features
History TrackingFavoritesExport
Key Features
Byte and bit conversions
Date/time calculations
Regex pattern testing
Hash generation (MD5, SHA)