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ETERNAL WORKSPACE is a desktop app for Windows. YouTube Studio relies on Windows’ built-in Data Protection API to encrypt sign-in tokens, so it is available on Windows only.

The Tag Editor edits MP3 files (ID3 tags and cover artwork). BPM & Key analyses MP3 and WAV files. You can add single files or whole folders — folders are scanned recursively.

No. There is no ETERNAL account. The Tag Editor and BPM & Key work entirely offline. Only YouTube Studio needs an internet connection and a Google account.

By design, ETERNAL never changes your tags on its own. Values from analysis or from file names appear as suggestions; click to apply them, then save. When results are sent from BPM & Key to the Tag Editor, only empty fields are filled — a different existing value is offered as “Replace”.

It is the offset of the track’s tuning reference from A4 = 440 Hz, in cents. A track tuned to 432 Hz shows about −32 cents. Offsets within ±10 cents are inaudible in practice and are not shown.

MP3 cover art is conventionally square. Non-square images are filled to a centred square automatically, without distortion. Use Adjust fit to choose Fill, Stretch or a custom crop instead.

Changes are written into the file only when you save. Tag frames that ETERNAL doesn’t edit are preserved. As with any tool that writes to files, keep backups of important material.

Open YouTube Studio and complete the one-time Google Cloud client setup the app asks for. Then choose Connect a channel: your browser opens Google’s sign-in page, where you pick the account (or brand channel) and grant access. Return to the app when the browser says “Connected”.

You can connect several channels, including channels from different Google accounts.

The account you picked has no channel yet. Create one on YouTube, or connect again and choose a different account or brand channel in Google’s account chooser.

The app waits five minutes for you to finish signing in in the browser. Start the connection again and complete the Google consent screen.

Google no longer accepts the saved sign-in — for example because access was removed in your Google Account. Choose Connect a channel again for that channel.

The YouTube Data API limits how many requests each Google Cloud project can make per day. Uploads use a large share of this quota. Try again after the daily quota resets.

Uploads are sent in chunks and resume where they stopped if the connection drops. If you close the app during an upload, the item returns to Ready in the queue and can be started again — drafts and their details are kept.

YouTube only allows custom thumbnails on channels that are permitted to use them (usually verified channels). Check your channel’s feature eligibility in YouTube Studio on the web.

You pick and see times in your computer’s local time zone. The app sends them to YouTube in UTC, and YouTube publishes the video at that moment — the app doesn’t need to be running.

In Settings → YouTube Studio, choose Disconnect next to the channel. The app deletes its token and queue and asks Google to revoke access. You can also remove access anytime at myaccount.google.com/permissions (opens in a new tab).

Only on your computer, in %APPDATA%\com.eternal\eternal_workspace\. Sign-in tokens there are encrypted with Windows DPAPI. Delete that folder (with the app closed) to remove everything. Full details are in the Privacy Policy.

No. The app contains no analytics, telemetry, advertising or crash-reporting code, and has no ETERNAL server to send data to.