An app for ChatGPT
Is your track ready to release?
Loudness Check measures your song, mix or podcast against the loudness targets for Spotify, YouTube, Apple Music, podcasts and EBU R128 broadcast, then brings it to the right level in one click.
Processed on your device. Your audio isn't uploaded. Details
Is my song loud enough for Spotify?
Done: it now sits right at Spotify's level, and the peaks still have room.
Three steps, all in the chat
No plugins, no meters to read. Ask a question, add the file, get an answer you can act on.
Ask
Ask ChatGPT something like "Is my song loud enough for Spotify?" or "Normalize my podcast audio."
Add your file
Drop a WAV, FLAC, MP3 or AAC file into Loudness Check, or attach it to your message.
Fix and download
See how far you are from the target, then download a level-matched 24-bit WAV.
Pick where it's going
Every platform plays music at its own level. Loudness Check knows the targets, so you only have to know where you're releasing. All share a true-peak ceiling of −1 dBTP.
Plays tracks at about the same level
Turns loud uploads down
A little quieter, more room for dynamics
Spoken word on podcast apps
Broadcast delivery (EBU R128)
Gain only, on purpose
Loudness Check only changes the overall level. It never limits, compresses or EQs your audio, and it tells you if your peaks stop it short of the target.
- Measures integrated loudness (LUFS), true peak and loudness range
- Turns the whole file up or down to the platform's target
- Stops at −1 dBTP so peaks never clip, and says how far short it is
- Exports a 24-bit WAV at your original sample rate
- No limiting, compression or EQ
- No noise removal or mastering
- No surround: mono and stereo files only
- No account, and no copy of your audio on our servers
Measurements follow ITU-R BS.1770-4 and EBU Tech 3342, with true peak read at 8× oversampling.
Your audio stays with you
Files you choose in Loudness Check are decoded, measured and normalized in your browser. They are never sent to our servers. ChatGPT only receives the file name and the numbers.
If you attach a file to a ChatGPT message, or download a normalized file inside ChatGPT, ChatGPT stores that file. Read the privacy policy