Frequently Asked Questions

More detail on sources and tools is in Tips & Tricks. For background on scrobbling and Last.fm itself, see Guides.

Start converting a playlist now, or read on for details.

Is my Spotify data stored on your server?

No. Your Spotify access token stays in your browser's sessionStorage and is never sent to our server. All Spotify API calls are made directly from your browser using your own token. We have no database, no user accounts, and no server-side sessions.

What information does Track Down access on my Spotify account?

When you connect, we request these scopes: view your account data (name, username, public playlists), view your activity (currently playing, top artists/tracks), and take actions (create/edit playlists, upload playlist cover images). We only use these to power the features you explicitly use.

Why do I need to connect Spotify?

Track Down searches Spotify's catalog to match your input tracks, then creates or updates playlists in your account. Both of these require a Spotify access token. The matching could theoretically work without authentication, but Spotify requires authentication for all API calls.

Can I use Track Down without a Spotify account?

No. The only use case for Track Down is converting music into Spotify playlists, so a Spotify account is required.

What happens to my Last.fm data?

When you use a Last.fm source, your browser sends a request to our passthrough API, which forwards it to Last.fm's API. We cache the response briefly (10-15 minutes) in Cloudflare KV to reduce redundant lookups. We don't log or store individual user data.

Is there a limit on how many tracks I can convert?

Spotify's API rate limits apply to your personal token, not to us. In practice, you can convert hundreds of tracks per session without issues. If you hit a rate limit (HTTP 429), Track Down automatically backs off and retries with exponential delay.

Can I add tracks to an existing playlist?

Yes. After matching, click "Add to existing" to see a dropdown of your playlists, then select one and click "Add." You can also create a new playlist at any time.

Does Track Down work on mobile?

Yes. The UI is responsive and works in mobile browsers. Canvas image downloads work on iOS and Android.

How do I save a toolbox image to my Spotify playlist as a cover?

Download the JPEG from the Playlist Cover tool, then on Spotify (desktop or mobile), edit your playlist and upload the image. Track Down doesn't automatically upload images to Spotify — you need to do that manually or use the playlist cover upload feature.

I found a bug or have a suggestion. Where do I report it?

There's no dedicated support channel set up yet.