SnipFree LUFS Audio Normalizer
Normalize audio to the exact loudness Spotify, Apple Music, YouTube, podcast apps, and broadcasters expect — or peak-normalize to a target dBFS. ITU-R BS.1770-4 measurement runs entirely in your browser. Nothing is uploaded.
Drop audio file here
or click to browse — measured & normalized in your browser, never uploaded
Your file is never uploaded. LUFS measurement and gain application happen in your browser — nothing is sent to a server. Privacy policy.
Normalize audio to Spotify, Apple Music, YouTube, podcast & broadcast loudness — free, private, no sign-up
SnipSound's normalizer measures your audio's integrated loudness using ITU-R BS.1770-4 K-weighting (the same standard Spotify and broadcasters use), then applies the gain needed to land on your target. Pick a platform preset for streaming, podcast, or broadcast delivery — or switch to peak mode to normalize by sample peak instead. Everything runs in your browser; nothing is uploaded.
Which LUFS target should I use?
It depends on where the audio is going. Streaming platforms apply loudness normalization on playback — if you master louder than their target, they turn you down. Mastering exactly to the target means your audio plays at the level you intended.
LUFS vs peak normalization — when to use which
LUFS normalization measures perceived loudness across the whole file. A quiet acoustic guitar piece and a loud rock mix end up sounding equally loud after normalization to -14 LUFS. This is what you want for music, podcasts, voice-overs — anything that gets played alongside other content where consistent loudness matters.
Peak normalization brings the single loudest sample to a target level (e.g. -1 dBFS). It preserves the original dynamic range exactly — a quiet song stays quiet, a loud song stays loud, you're just guaranteeing nothing exceeds your target peak. Use this for sound effects, short clips, or when you want to avoid clipping without affecting perceived loudness.
What gets shown after upload
- Integrated loudness (LUFS) — the single ITU-R BS.1770-4 number describing how loud the whole file sounds. Streaming platforms compare this to their target.
- Peak (sample dBFS) — the loudest single sample. -0.1 dBFS means the file is just below digital clipping; -6 dBFS means there's 6 dB of headroom before clipping.
- Gain to apply — the difference between your current loudness and your target. Positive means we'll turn it up; negative means we'll turn it down.
Why use SnipSound's normalizer
- 100% in your browser. Auphonic, Adobe Podcast, and Loudness Penalty Analyzer all upload your file to a server. We don't — your master never leaves your device.
- Real ITU-R BS.1770-4 measurement. K-weighted, gated, integrated. Same standard streaming platforms use to evaluate your upload.
- Both LUFS and peak modes in one tool. Most free tools offer one or the other.
- Platform presets baked in. No need to memorize that Spotify is -14 and Apple Music is -16 — pick the platform, hit Normalize.
- Clipping protection. When the source is quieter than your target, we tell you exactly how much gain we capped and what the actual output LUFS will be.