YouTube Subtitle Styler by Sefohui
Force your preferred subtitle style on YouTube — font, size, color, background and more. Styles stay locked in even when YouTube resets your preferences.
Extension Metadata
About this extension
YouTube Subtitle Styler lets you take full control over how subtitles look on YouTube. Set your preferred font, size, text color, background color and opacity, bold, italic, and text shadow — then save once and never worry about YouTube resetting your preferences again.
Styles are enforced using CSS injection with a MutationObserver that automatically reapplies your settings if YouTube tries to override them. All settings are stored locally and applied instantly on every YouTube page you visit.
No account required. No data collected. Open source.
GitHub: https://github.com/Sefohui/youtube-subtitle-styler
Styles are enforced using CSS injection with a MutationObserver that automatically reapplies your settings if YouTube tries to override them. All settings are stored locally and applied instantly on every YouTube page you visit.
No account required. No data collected. Open source.
GitHub: https://github.com/Sefohui/youtube-subtitle-styler
Rated 5 by 1 reviewer
Permissions and data
Required permissions:
- Access browser tabs
- Access your data for sites in the youtube.com domain
Optional permissions:
- Access your data for sites in the youtube.com domain
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Version
- 1.3.0
- Size
- 23.54 KB
- Last updated
- 2 days ago (Mar 14, 2026)
- Related Categories
- License
- MIT License
- Version History
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