Lumina 3.0 — Zen Architecture

Nuke YouTube
Distractions.
Master Focus.

The world's first YouTube study environment built for deep work. Faster, lighter, and completely private.

Install on Chrome — Free See how it works
Lumina on Product Hunt
Top 200 Tutorial Keywords
+2,600 Rank Jump in Education
46 KB Total Bundle Size
LUMINA
Stamp
Export
FOCUS
94%
[02:14] Big Bang — 13.8 billion years ago
universe started hot, dense, expanded fast
[06:47] why can't we see past the CMB?
light couldn't travel freely before then
Why Students Love It

Everything you need
to actually focus.

01

Battery-Friendly Focus

Lumina makes YouTube run smoother and cooler on your laptop. By telling your browser to stop working on parts of the page you can't see, it frees up real power for the video — and for you.

/* Skips paint for hidden elements */
content-visibility: auto;
contain: layout paint;
contain-intrinsic-size: auto 1000px;
02

Immersive Study Mode

Your notepad subtly glows with the colors of your video — blues for nature documentaries, warm golds for lectures, deep reds for drama. It helps your brain enter a Flow State and stay there.

/* 100 pixels sampled every 10s */
canvas.width = 10;
ctx.drawImage(video, 0, 0, 10, 10);
// → rgba(r, g, b) glow on notepad
03

Your Personal Video Library

Close the tab. Come back next week. Your notes are still there, attached to that exact video — not mixed in with everything else. You'll never lose a study note again.

/* One note stack per video */
key: `notes_${videoId}`
storage: chrome.storage.local
// 10MB headroom. 100% local.
distractions hidden
LUMINA
91%
[04:12] DNA replication starts at origins
helicase unwinds the double helix
[07:55] leading vs lagging strand
lagging synthesized in fragments
Focus Score

Awareness,
not judgement.

Think of it like closing your rings — but for your brain. Lumina tracks how focused you were during a study session and shows you a simple score at the end. No pressure, just progress.

Pause the video to take a break? Clock pauses too. Switch tabs? We notice. Come back? We pick up where you left off. Level up your focus, one session at a time.

Your session focus Score
94%
62%
31%

🟢 Deep Focus  ·  🟡 Distracted  ·  🔴 Off-task

0
Accounts needed
30s
To set up
Free
Forever
🔥 Featured on Product Hunt

Loved by the
PH community.

Students, makers, and lifelong learners on Product Hunt spotted Lumina early — and helped us climb 2,600 spots in Education. Join thousands who've already flipped the switch.

Lumina on Product Hunt

This is the extension I didn't know I needed. My lecture notes are so much better now — I can actually keep up without losing my place.

AK
@ananya_k · Med student, Product Hunt
Share this Zen

Finally, a focus tool that respects my privacy. No logins, no cloud sync. My notes are mine.

JR
@james_r · CS student, Product Hunt
Share this Zen
Trust & Privacy

Your data never
leaves your machine.

Your notes stay on your device

Everything you write is saved locally on your own computer. No servers, no cloud, no accounts. Even if we shut down tomorrow, your notes are safe — because we never had them.

Built to Chrome's highest standard

Lumina uses Manifest V3 — Chrome's latest, most secure extension format. It only activates when you open YouTube. Every other site you visit is completely untouched.

We see nothing. We know nothing.

No analytics. No usage tracking. No crash reports sent to a server. There is nothing to collect — by design. Lumina runs entirely inside your browser, with no way to phone home.

Two permissions. That's it.

We only ask for what we need — nothing more.

Save your notes locally
Show the notepad on youtube.com
FAQ

Common questions

Does Lumina work with YouTube Premium?
Yes, perfectly. Whether you have Premium or a free account, Lumina works exactly the same. It doesn't interact with your subscription at all — it simply cleans up the YouTube interface.
Will it slow down my browser?
Actually, Lumina makes YouTube faster. By hiding the sidebar and comments, your computer has less to draw on screen — which means more power for the video and for your battery. Students on older laptops have noticed a real difference.
What happens to my notes if I close the tab?
They're saved automatically as you type. Close the tab, restart your browser, come back to the same YouTube video — your notes will be exactly where you left them. Just use the Export button before you uninstall the extension.
Does it work on Edge or Brave?
Yes — Microsoft Edge and Brave both support Chrome extensions. If you can visit the Chrome Web Store, you can install Lumina. Firefox isn't supported yet.
Ready

Your best study
session starts now.

30 seconds to install. No account. No setup. Open a YouTube video, flip the switch, and feel the difference.

Install Lumina — It's Free

Chrome · Edge · Brave  ·  No account  ·  No credit card