Check the tool page first
Every tool has its own FAQ covering the questions we get most, including the real limits each one enforces — the 500 MB upload cap, the 40-second ringtone length, the 0.25×–4× speed range, the ±12 semitone pitch range, and why vocal removal works on some songs and not others. If your question is about what a tool can do, the answer is usually already on its page.
Reporting a problem
The more specific you are, the faster this goes. Useful details: which tool you were using, the format and rough size of the file, your browser and operating system, the settings you had chosen, and the exact wording of any error message. If an export failed, tell us whether the failure happened while uploading or while the file was being processed. We cannot look at your file to investigate, because exported files are deleted as soon as the download finishes and we keep no copies.
Things we can't help with
We can't recover a file you have already downloaded and lost, because nothing is retained on our side. We can't grant permission to use audio you don't own — that has to come from whoever holds the rights. And we can't download audio from streaming services on your behalf; the tools work on files you already have.
What happens to your message
It reaches us by email and nowhere else. We don't add you to a mailing list, we don't pass your address on, and we don't need an account from you to reply.