What happens to an uploaded file
Your browser decodes the original file locally. For audio between 15 and 30 seconds, the sample covers the full duration. Longer tracks contribute three ten-second windows distributed across the recording. The server receives at most 30 seconds of mono audio, not the original file.
The detection service processes those samples in memory and returns the result. Suno Checker stores neither uploaded music nor detection results. A CSV export is created in your browser; the file remains wherever you choose to save it.
Documented product facts
These are implementation facts for the public service as of October 11, 2026, not accuracy claims.
| Property | Current behavior |
|---|---|
| Price and account | Free, no account or subscription |
| Track quota | No daily or monthly track quota |
| Upload formats | MP3, WAV, FLAC and M4A |
| Track duration | 15 seconds to 10 minutes |
| File size | Up to 100 MB per file |
| Audio examined | Up to 30 seconds per track |
| Batch processing | Sequential, submitted with the analyze button |
| Export | Free CSV generated in the browser |
| Retention | No stored audio or result history |
What the result fields mean
The combined AI signal is the detection ensemble’s score on a 0–100 scale. Acoustic fingerprint and AI detection signals 1 and 2 show separate outputs used by the detector. They are not vocal, instrumental, ownership or copyright scores.
Flagged sample windows is the mean share of sampled windows flagged by the two neural detectors. It is not the percentage of the whole song created by AI. A low combined score does not certify human authorship, and a high score does not prove a particular generator was used.
What has not been established
We have not published an independently validated accuracy benchmark for this service. We do not claim a false-positive rate, genre-specific accuracy or verified coverage of each Suno or Udio version. Operational tests that check requests and responses do not establish detection accuracy.
Research distinguishes test-set performance from robustness to edited audio and unseen generators. See the cited research for that broader limitation. Compare an uncertain result with production records and the creator’s explanation.
Operating limits and privacy
There is no track-count paywall. File limits, request-rate controls and a concurrent processing guard protect availability. A busy response can require a later retry.
The optional fromband launch waitlist is separate from detection. It stores only the email and consent information described in our privacy policy, and is not required to use the tool.