Video Brightener — Brighten Dark Video Scenes

Brightens dark, hard-to-see scenes in videos. Works in fullscreen and on DRM-protected streaming, with zero external communication.

As of June 2026, Video Brightener — Brighten Dark Video Scenes has 13 users in the Accessibility category.

Usersno change0%
13
13
Ratingno change0%
— reviews
Reviewsno change0%
Version
0.4.0
Manifest V3
90-day change · In the last 90 days this extension 1 version update, changed permissions.

History

5 snapshots

Tracking since May 14, 2026.

13.728.53.2799999999999994May 14, 2026Jun 8, 2026
View as table
DateUsersRatingReviewsVersion
May 14, 20260.2.1
May 20, 20260.2.1
May 26, 202640.4.0
Jun 2, 202670.4.0
Jun 8, 2026100.4.0
Now130.4.0

Changelog

  • May 20, 2026
    description
    ■ こんな悩みを解決します
    ・実況動画の暗いシーンが見えない
    ・映画やドラマで暗いシーンの細部がわからない
    ・ホラーゲーム配信の暗部がつぶれて何が起きてるかわからない
    ・モニターの輝度を上げても、周りが眩しくなるだけで動画は見やすくならない
    
    ■ Video Brightenerの特長
    ・暗いシーンだけ明るくする「ガンマ補正」を採用
    ・「白っぽくなる」を防ぐコントラスト調整を内蔵
    ・明るさ・コントラストを個別スライダーで調整
    ・プリセット4段階(弱/中/強/最強)でワンクリック切り替え
    ・フルスクリーン再生でも効く(多くの類似拡張で動かない部分)
    ・有料配信のDRM動画でも動作
    
    ■ プライバシー
    ・外部サーバーとの通信は一切行いません
    ・動画のピクセルデータを読み取ることもありません
    ・保存される情報は「ON/OFF」「明るさ」「コントラスト」の3項目のみ
    ・アナリティクスやトラッキングは入っていません
    
    ■ 制限事項
    ・Picture-in-Picture モードでは仕様上フィルタが反映されません
    ・一部のハードウェアアクセラレーション環境ではフィルタが効かない場合があります
    
    ■ 仕組み(技術的興味のある方へ)
    SVGフィルタ(feComponentTransfer)でガンマ補正と線形コントラストを2段適用しています。
    GPU合成パスで処理されるため、4K60fps動画でも処理負荷はほぼゼロです。
    動画フレームをcanvasに描画しないため、Widevine等のDRMでも動作します。
    
    ■ お問い合わせ
    不具合・要望は [email protected] まで
    ■ The problem this solves
    - Dark scenes in gameplay streams you just can't see
    - Movie and TV scenes too dark to make out the details
    - Crushed shadows in horror-game streams — you can't tell what's happening
    - Turning up your monitor only makes everything else glaring
    
    ■ What Video Brightener does
    - Uses gamma correction to lift only the dark areas
    - Built-in contrast adjustment prevents a washed-out look
    - Independent sliders for brightness and contrast
    - Four one-click presets (Low / Medium / Strong / Max)
    - Works in fullscreen, where many similar extensions fail
    - Works on DRM-protected streaming
    
    ■ Privacy
    - No communication with external servers, ever
    - Never reads the pixel data of your video
    - Stores only three settings: on/off, brightness, contrast
    - No analytics, no tracking
    
    ■ Limitations
    - Filters do not apply in Picture-in-Picture mode (a platform limitation)
    - On some hardware-acceleration setups the filter may not take effect
    
    ■ How it works (for the technically curious)
    A two-stage SVG filter (feComponentTransfer): gamma correction plus linear contrast.
    It runs on the GPU compositing path, so even 4K60fps video adds virtually no load.
    It never draws video frames to a canvas, so it works under Widevine and other DRM.
    
    ■ Contact
    Bugs and requests: [email protected]
  • May 20, 2026
    short_description
    動画の暗くて見えにくいシーンを明るく補正します。フルスクリーン対応、DRM配信対応、外部通信なし。
    Brightens dark, hard-to-see scenes in videos. Works in fullscreen and on DRM-protected streaming, with zero external communication.
  • May 20, 2026
    name
    Video Brightener - 動画の暗いシーンを明るく
    Video Brightener — Brighten Dark Video Scenes
  • May 20, 2026
    host_permissions
    https://www.youtube.com/*, https://www.youtube-nocookie.com/*, https://www.twitch.tv/*, https://*.nicovideo.jp/*, https://vimeo.com/*, https://player.vimeo.com/*, https://video.unext.jp/*, https://*.abema.tv/*
    https://www.youtube.com/*, https://www.youtube-nocookie.com/*, https://www.twitch.tv/*, https://*.nicovideo.jp/*, https://vimeo.com/*, https://player.vimeo.com/*, https://video.unext.jp/*, https://*.abema.tv/*, https://*.netflix.com/*, https://*.disneyplus.com/*, https://*.primevideo.com/*, https://www.amazon.co.jp/*, https://www.amazon.com/*, https://*.hulu.com/*, https://*.hulu.jp/*, https://*.max.com/*

Permissions & access

Permissions
storage
Host access
https://www.youtube.com/*, https://www.youtube-nocookie.com/*, https://www.twitch.tv/*, https://*.nicovideo.jp/*, https://vimeo.com/*, https://player.vimeo.com/*, https://video.unext.jp/*, https://*.abema.tv/*, https://*.netflix.com/*, https://*.disneyplus.com/*, https://*.primevideo.com/*, https://www.amazon.co.jp/*, https://www.amazon.com/*, https://*.hulu.com/*, https://*.hulu.jp/*, https://*.max.com/*

Screenshots

Video Brightener — Brighten Dark Video Scenes screenshot 1Video Brightener — Brighten Dark Video Scenes screenshot 2

About

■ The problem this solves
- Dark scenes in gameplay streams you just can't see
- Movie and TV scenes too dark to make out the details
- Crushed shadows in horror-game streams — you can't tell what's happening
- Turning up your monitor only makes everything else glaring

■ What Video Brightener does
- Uses gamma correction to lift only the dark areas
- Built-in contrast adjustment prevents a washed-out look
- Independent sliders for brightness and contrast
- Four one-click presets (Low / Medium / Strong / Max)
- Works in fullscreen, where many similar extensions fail
- Works on DRM-protected streaming

■ Privacy
- No communication with external servers, ever
- Never reads the pixel data of your video
- Stores only three settings: on/off, brightness, contrast
- No analytics, no tracking

■ Limitations
- Filters do not apply in Picture-in-Picture mode (a platform limitation)
- On some hardware-acceleration setups the filter may not take effect

■ How it works (for the technically curious)
A two-stage SVG filter (feComponentTransfer): gamma correction plus linear contrast.
It runs on the GPU compositing path, so even 4K60fps video adds virtually no load.
It never draws video frames to a canvas, so it works under Widevine and other DRM.

■ Contact
Bugs and requests: [email protected]

Technical

Version
0.4.0
Manifest
V3
Size
19.82KiB
Min Chrome
88
Languages
2
Featured
No

Metadata

ID
fgnimlbknladhkjjncailiolinldipgg
Developer ID
u3ddb53ff6f816cb996e165005c62a2fa
Developer Email
[email protected]
Created
May 13, 2026
Last Updated (Store)
May 15, 2026
Last Scraped
Jun 8, 2026
Website
Support URL
Privacy Policy

Data sourced from the Chrome Web Store · last verified Jun 8, 2026.