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Perfect Key

perfectkey.app
ExtensionTools10 users
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Item media 1 (screenshot) for Perfect Key
Item media 1 (screenshot) for Perfect Key
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Overview

Suggests the ideal key for worship songs from SongSelect, tailored to a predefined vocal range.

Perfect Key helps worship leaders and musicians find the right key — instantly. Open any song on SongSelect (CCLI), set your vocal range once using the interactive piano keyboard, and Perfect Key will analyze the song and recommend the key that fits your voice best. No more trial and error, no more transposing in the middle of rehearsal. KEY FEATURES • Instant key recommendation — analyzed directly from the SongSelect page • Interactive piano keyboard — set your lowest and highest note visually • Song history — remembers the recommended key for every song you've analyzed • 26 languages supported — UI available in English, German, French, Spanish, Portuguese, and many more • Hand sign display — shows a hand sign for the recommended key • Adjust on the fly — shift the recommended key up or down with +/– buttons • Multiple singers — save different vocal range profiles for different people • 100% local — no data is sent anywhere, everything stays in your browser PERFECT FOR • Worship leaders preparing setlists • Spontaneous worship moments with no plan • Musicians who want to transpose quickly without guessing PRIVACY Perfect Key does not collect, transmit, or store any personal data outside your browser. All settings and history are saved locally via Chrome's storage API. Free to use. If it saves you time, a small Ko-fi donation is always appreciated — but never required.

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Details

  • Version
    1.0
  • Updated
    April 12, 2026
  • Size
    695KiB
  • Languages
    English
  • Developer
    Website
    Email
    hey@jonathan-rhein.de
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

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The developer has disclosed that it will not collect or use your data.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, visit the developer's support site

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