JG BlueLight Guard uses SVG color-matrix mathematics to suppress only the blue channel — no yellowing, no blur, no sacrifice in sharpness.
✓ 7-day free trial · No credit card required · Works on all websites
Most night modes paint a warm-yellow layer over everything. JG BlueLight Guard is fundamentally different — it operates at the color-channel level.
Only the blue (B) channel of the RGB color model is suppressed. Red and green remain untouched, preserving natural color accuracy.
Uses the browser's built-in SVG color matrix filter for pixel-level manipulation — far more precise than CSS hue-rotate or sepia overlays.
If a website's Content Security Policy blocks inline SVG, the extension automatically switches to CSS filter mode — seamlessly, with zero user action.
Automatically adjusts protection intensity by time of day — gentle in the morning, strong at night — without you needing to touch a thing.
| Feature | 👁 JG BlueLight Guard | OS Night Mode |
|---|---|---|
| Blue-channel only filtering | ||
| No yellowing | ||
| No blurring | ||
| Per-site exclusion | ||
| Adjustable intensity (0–100%) | ||
| Works in browser only (no system-wide tint) | ||
| Smart schedule by time-of-day | ||
| CSP auto-fallback |
The feColorMatrix filter applies a 4×5 matrix transformation to every pixel's RGBA channels. JG BlueLight Guard reduces the Blue (B) row value while leaving R and G intact — no whole-screen yellowing.
GPU-accelerated SVG filter — the browser handles it natively at the compositor layer.
No data collected. No server calls. All settings stored locally via Chrome Storage API.
Built on Chrome's latest extension standard for maximum security and longevity.
Content script injected on every tab. Works on http and https universally.
Fine-tune protection to your exact preference. Changes apply instantly with hardware-accelerated rendering.
Gentle — max color accuracy. Standard — balanced protection. Strong — maximum blue block. (Gentle & Strong are Pro features.)
Whitelist specific websites where you don't want the filter applied — photo editing sites, color-critical tools, etc. (Pro)
Morning 9–14h: 25%. Afternoon 14–18h: 40%. Evening 18–22h: 65%. Night 22–6h: 85%. All automatic. (Pro)
Switches between SVG Matrix (precise) and CSS Filter (universal) depending on the site's Content Security Policy.
One-time purchase, unlimited use. Activate with your Lemon Squeezy UUID key in under 5 seconds — no account login required.
Start free for 7 days. Upgrade to Pro when you're ready — one-time payment, lifetime use.
Secure checkout via Lemon Squeezy
a1b2c3d4-e5f6-7890-abcd-ef1234567890). Open the extension popup → scroll to Advanced → paste the key → click Apply. Activation takes 1–2 seconds. No account or login required.
We protect your eyes, not harvest your data. Here is exactly what the Extension does — and doesn’t — do.
We do not collect your name, email, IP address, location, browsing history, or any personally identifiable information — ever.
All settings live in Chrome’s own storage. We cannot access them.
The only outbound calls are license activation/deactivation — when you initiate them.
api.lemonsqueezy.comChrome extensions must declare every capability they use. Here is why each permission is strictly necessary:
| Permission | Why it’s needed | What it does NOT do |
|---|---|---|
storage |
Save filter settings, trial/license state to Chrome's local & sync storage so preferences survive browser restarts. | Does not read or write any website data. |
tabs |
Read the domain of the active tab (e.g. youtube.com) to check whether it is on your whitelist. Required to show the correct toggle state in the popup. |
Does not read page content, history, or any data on the page. |
activeTab |
Provides access to the active tab when the popup opens, so the whitelist toggle reflects the current domain accurately. | Only active while the popup is open. Grants no background access. |
alarms |
Runs the Smart Schedule feature every 15 minutes to adjust filter intensity by time of day, and updates the badge counter every hour. | No data is collected or transmitted by alarms. They only trigger internal timer functions. |
<all_urls> |
Core function. Injects the blue-light CSS/SVG filter into every webpage you visit. Without broad host permission, the filter can only be applied to pre-listed domains — which would break the extension entirely. | The Extension only writes a CSS filter style to the page. It never reads page content, text, form data, or URLs of pages you visit. |
7 days free. No credit card. Install in 10 seconds.
Compatible with Chrome, Edge, Brave, and all Chromium-based browsers.
청색광 차단, 황변 없음, 화면 흐림 없음
대부분의 블루라이트 차단 앱이나 OS 야간 모드는 화면 전체에 노란색 오버레이를 덮습니다. JG BlueLight Guard는 SVG feColorMatrix를 사용해 청색(B) 채널만 수학적으로 억제합니다. 적색·녹색 채널은 그대로 유지되어 색감이 자연스럽고, 황변·흐림 현상이 없습니다.
• 보호 강도 슬라이더 (0–100%)
• 필터 모드: 부드럽게 / 표준 / 강하게
• 사이트별 필터 제외 기능
• 시간대별 자동 세기 조절 (스마트 스케줄)
• SVG 매트릭스 + CSS Filter 이중 엔진 (CSP 자동 대응)
시간대에 따라 자동으로 보호 강도를 조절합니다:
🌅 오전 9–14시 → 25%
☀️ 오후 14–18시 → 40%
🌆 저녁 18–22시 → 65%
🌙 심야 22–6시 → 85%
무료 체험: 7일 동안 Pro 기능을 포함해 완전 무료로 사용합니다.
Pro 플랜: 1회 결제 · 평생 사용 (약 $3.99)
결제 완료 후 이메일로 라이선스 키가 발송됩니다. 팝업의 고급 설정에서 키를 입력하면 즉시 Pro가 활성화됩니다.
1. 구매 완료 후 이메일에서 UUID 형식 키를 확인합니다
예: a1b2c3d4-e5f6-7890-abcd-ef1234567890
2. 크롬 툴바의 확장 아이콘 클릭 → 팝업 오픈
3. 고급 설정 열기 → 라이선스 키 입력란에 붙여넣기
4. "적용" 버튼 클릭 → 즉시 Pro 활성화
어떠한 개인정보도 수집하지 않습니다. 모든 설정은 크롬 로컬 스토리지에만 저장됩니다. 라이선스 검증 시 Lemon Squeezy API와만 통신하며, 방문 사이트 정보나 사용 기록은 절대 외부로 전송되지 않습니다.
7일 무료 체험 · 카드 불필요 · 설치 10초