| What it does | Change the key of audio in your Chrome tab while keeping vocals natural
| Free Chrome extension to detect fonts on any website, find free alternatives, and swap them live
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| Stage | Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Pitch shift from −12 to +12 semitones
- Fine-tuning by ±50 cents
- Keep vocals natural mode enabled by default
- Preserves playback speed while changing pitch
- Works with YouTube, YouTube Music, Spotify Web, SoundCloud
- Video stays synchronized with processed audio
- Remembers pitch preferences for each song
- Keyboard shortcuts for pitch adjustment
- Processes audio locally with no uploads
- Powered by Key Changer Engine for natural pitch shifting
| - Canvas-based font detection on any page
- Premium font flagging with free alternative matching
- Live font swapping with instant undo
- Font inspector showing computed properties
- Highlight font usage across page elements
- Export results as Markdown, JSON, or CSS
- WCAG contrast ratio audit
- Font performance metrics tracking
- Works on any website including authenticated pages
- No account or sign-up required
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| What makes it different | - Preserves natural vocal character while shifting pitch
- Processes audio locally in browser, no data uploaded
- Works with most major streaming platforms without additional setup
- Video stays perfectly synchronized with pitch-shifted audio
| - No account or data collection required
- Works on any website instantly without installation beyond the extension
- High accuracy font detection using DOM computed properties
- Completely free with no premium tier or ads
- Changes are local only and changes persist in your browser session
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 2 ● no change since last check | 3 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 7 |
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| Citation Flow (Majestic) | 12 | 25 |
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| Referring domains (Majestic) | 2 | 30 |
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Key Changer
FontSwap