Skip to content

BellRiver Lab

Small tools and projects I built because I needed them while developing.

Frequently used

QR Maker Image Tools Diff Calculator Color Tools Morse

All tools

Text Compare Highlight what changed between two texts and count characters Color Tools Convert color codes, build palettes, check contrast and color vision Morse Code Convert text and code, transmit by sound, vibration or flash Interval Timer A running timer that alternates run and rest intervals Reaction Time Test Measure your click reaction time and share the result as an image Design System The color, type and spacing tokens this site is built on Generators UUIDs, passwords, nicknames, dummy data and random picks Network Check Internet speed, latency, jitter and your connection details Instruments Play piano, guitar and drums in your browser Image Editor Crop, rotate, filter, resize, pixelate and draw QR Maker Turn links, Wi-Fi and contacts into QR codes with color and a logo Calculators Loans, VAT, take-home pay, deposits and severance Spell Checker Find and fix Korean spelling, spacing and loanword errors Lottery Stats Winning numbers and statistics for KR, US, JP and CN lotteries Fortune BaZi, zodiac, runes and name readings

Recent dev notes

View all →

Latest on Tistory

Go to blog →

What I Like & Use

Ubuntu
CSS
PuTTY
Whale browser
Red Hat
AWS
Adobe Illustrator
Git
PostgreSQL
React
MS SQL Server
Visual Studio 2022
Notion
Figma
WinSCP
GSAP
Visual Studio Code
Node.js
JavaScript
Nginx
GitHub
Tistory
Postman
Fiddler
Outlook
HTML
Adobe XD
Adobe Photoshop
jQuery
Android Studio