How it works
- Drop your master. MP3, WAV, FLAC, AIFF, OGG or M4A up to 500 MB — it's decoded and analyzed locally, nothing is uploaded.
- One pass runs every check. Integrated loudness, true peak, dynamics (LRA), clipping, mono compatibility, sample rate and format, leading/trailing silence and duration.
- Read the verdict. Each check gets a pass / warn / fail badge with its measured value and a plain-language explanation, plus a global readiness score.
Features
- Loudness vs streaming targets. Your integrated LUFS is compared to the platforms' reference levels — Spotify, YouTube, Amazon and Tidal at −14, Deezer at −15, Apple Music at −16.
- True peak and clipping. Flags inter-sample true peaks above −1 dBTP and locates actual clipped regions in the file.
- Beyond the meters. Mono compatibility, dynamics (LRA), sample rate and lossless format, accidental leading/trailing silence, and the 30-second streaming duration threshold.
- 100% in your browser. Your master never leaves your computer — every measurement runs locally.
FAQ
Is the release checker free?
Yes. Anonymous users get 5 free checks per day — no account needed. One check is counted per file analyzed; re-reading the report costs nothing. AudioKit Premium removes the daily limit.
Is my master uploaded to a server?
No. The file is decoded and all measurements run entirely in your browser — it never leaves your machine. The only network call is a tiny anonymous counter that tracks your daily free quota.
What loudness do streaming platforms actually want?
The common reference points the tool checks against: Spotify, YouTube, Amazon Music and Tidal normalize around −14 LUFS, Deezer around −15, Apple Music around −16, with a true peak kept at or below −1 dBTP. You don't have to hit −14.0 exactly — platforms turn loud masters down anyway — but landing in that neighborhood with clean true peaks means your track plays back the way you mixed it.
What exactly does it check?
Nine things in one pass: integrated loudness (LUFS) against streaming targets, true peak (warn above −1 dBTP, fail above 0), loudness range (LRA) for over-compression or excessive dynamics, clipped regions, mono compatibility (phase correlation), sample rate and lossless format, leading silence, trailing silence (too long or cut too abruptly), and the 30-second minimum duration that streaming royalties depend on. Each gets a pass / warn / fail badge plus a global score.
Will it fix the problems it finds?
No — it's a pre-flight check, not a repair tool, and that's deliberate: each fix belongs in the right place. Loudness off target? Use our LUFS normalize tool or adjust your limiter. Clipping? Locate it with the Clipping detector and fix the gain staging upstream. Silence at the edges? Trim it. The checker tells you what's wrong and where; the fixing stays under your control.