NotoSansへ置換するやつ(改修型) by 1llum1n4t1
読みづらいフォントをNoto Sans JP / UDEV Gothic JPDOCに自動置換。パフォーマンス改善版。
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About this extension
✨ Features
・🎨 Fixed Fonts: Body text replaced with Noto Sans JP, monospace with UDEV Gothic JPDOC. No configuration needed.
・🔘 On/Off Toggle: Easily enable or disable the extension via the popup toggle button.
・⚡ Fast & Lightweight: Optimized for minimal impact on page load speed.
・🔄 Fully Automatic: Works instantly across all websites without configuration.
・📦 Modern Web Support: Supports Shadow DOM elements (works on YouTube and modern web apps).
・🌐 Dynamic Font Detection: Automatically detects fonts requested by sites and incorporates unknown names into the replacement target set.
・🎯 Preserve Intent: Replaces fonts based on their type (Gothic, Serif, or Monospace) to maintain the intended layout.
・🛠️ Broad Coverage: Covers everything from OS standard fonts to popular web fonts like Inter and Roboto.
🔤 Bundled Fonts
▼ Body: Noto Sans JP (Regular 400)
Google's open-source Japanese font. Wide weight coverage, beautiful rendering at any size, optimized for mixed Japanese/Latin layouts.
▼ Monospace: UDEV Gothic JPDOC (Regular 400)
BIZ UD Gothic + JetBrains Mono composite. Excellent code legibility with clear dakuten/handakuten distinction. Ideal for source code with Japanese comments.
※ Bold weights are preserved. This variant has no font picker (fixed-fonts edition). If you want to choose fonts yourself, use the regular edition "目に優しいフォント置換".
🔄 Replacement Logic
・General Fonts (Gothic/Serif/System): Replaced with Noto Sans JP.
・Monospace Fonts & Code: Replaced with UDEV Gothic JPDOC.
📄 License
・Project: MIT License — https://github.com/1llum1n4t1s/ReplaceFontSelect/blob/main/LICENSE
・Bundled fonts: All licensed under SIL Open Font License 1.1 — https://scripts.sil.org/OFL
・🎨 Fixed Fonts: Body text replaced with Noto Sans JP, monospace with UDEV Gothic JPDOC. No configuration needed.
・🔘 On/Off Toggle: Easily enable or disable the extension via the popup toggle button.
・⚡ Fast & Lightweight: Optimized for minimal impact on page load speed.
・🔄 Fully Automatic: Works instantly across all websites without configuration.
・📦 Modern Web Support: Supports Shadow DOM elements (works on YouTube and modern web apps).
・🌐 Dynamic Font Detection: Automatically detects fonts requested by sites and incorporates unknown names into the replacement target set.
・🎯 Preserve Intent: Replaces fonts based on their type (Gothic, Serif, or Monospace) to maintain the intended layout.
・🛠️ Broad Coverage: Covers everything from OS standard fonts to popular web fonts like Inter and Roboto.
🔤 Bundled Fonts
▼ Body: Noto Sans JP (Regular 400)
Google's open-source Japanese font. Wide weight coverage, beautiful rendering at any size, optimized for mixed Japanese/Latin layouts.
▼ Monospace: UDEV Gothic JPDOC (Regular 400)
BIZ UD Gothic + JetBrains Mono composite. Excellent code legibility with clear dakuten/handakuten distinction. Ideal for source code with Japanese comments.
※ Bold weights are preserved. This variant has no font picker (fixed-fonts edition). If you want to choose fonts yourself, use the regular edition "目に優しいフォント置換".
🔄 Replacement Logic
・General Fonts (Gothic/Serif/System): Replaced with Noto Sans JP.
・Monospace Fonts & Code: Replaced with UDEV Gothic JPDOC.
📄 License
・Project: MIT License — https://github.com/1llum1n4t1s/ReplaceFontSelect/blob/main/LICENSE
・Bundled fonts: All licensed under SIL Open Font License 1.1 — https://scripts.sil.org/OFL
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Permissions and data
Required permissions:
- Access your data for all websites
Optional permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 3.0.7
- Size
- 33.41 MB
- Last updated
- 3 days ago (May 18, 2026)
- Related Categories
- License
- MIT License
- Version History
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