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Jishu Labs

Keisan

Developer-focused calculation tool

Full-Stack Developer2024Solo project

Live Demo

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)