About SWYoon Labs

SWYoon Labs is the personal blog and product hub of swyoon, an independent developer building lightweight Chrome extensions that help people study, focus, and stay organised — right inside the browser.

What this blog is for

This is where I publish:

• Extension overviews — what each extension does and who it is for
• Installation and first-use tutorials — step-by-step guides for new users
• Feature walkthroughs — how to get the most out of each tool
• Developer stories — why and how each extension was built, with real code
• Release notes — what changed in each update
• Troubleshooting and FAQs — answers to common questions

I write in English here. If you are looking for my Korean development notes, they live at won-solution.com.

My Chrome extensions

Extension	What it does
Simple Side Note	A notepad that lives in the Chrome sidebar — take notes without switching tabs
Phrase Hero	Learn English phrases and idioms with short, frequent quizzes
Side Panel Clock	A clock, world clock, timer, and Pomodoro for the browser sidebar

All extensions are built with privacy in mind: no accounts, no servers, no tracking. Your data stays on your device.

How I build

My extensions are intentionally small and dependency-free — plain HTML, CSS, and vanilla JavaScript on top of Chrome's Manifest V3 extension platform. No frameworks, no build steps, no analytics SDKs. The full source code for each extension is public on GitHub.

Connect

• 🌐 Blog: swyoonlabs.blogspot.com
• 🔗 GitHub: github.com/swyoonlabs
• ✉️ Contact: See the Contact page

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Last updated: July 2026