Free LUFS Loudness Normalizer
Normalize a track to streaming, club, or broadcast loudness (LUFS) — free, no sign-up, no watermark.
Lower (more negative) is quieter with more headroom. Higher (closer to 0) is louder, with a greater risk of clipping.
Two-pass accurate
Measures actual loudness first, then corrects precisely.
3 presets + custom
Streaming, club, broadcast, or your own LUFS target.
No sign-up
No account, no email, no watermark.
How to normalize loudness
- Upload an MP3, WAV, FLAC, M4A, AAC, OGG, or AIFF file.
- Choose Streaming, Club, Broadcast, or set a custom LUFS target.
- Download the result — measured and corrected in two passes for accuracy.
Why loudness matching matters for streaming
Streaming platforms don't play tracks at whatever level they were mastered — each one normalizes playback to its own target, turning louder tracks down to match it. The exact target isn't identical everywhere, though: Spotify's default normalization level is -14 LUFS integrated, and YouTube sits in the same neighborhood, while Apple Music normalizes closer to -16 LUFS — a bit quieter than the other two. A track mastered significantly louder than a platform's target gets turned down on playback and can end up sounding flatter or less punchy relative to a track that was already close to it.
Mastering with a platform's target in mind ahead of time means the platform has less (or no) correction to apply, preserving more of the intended dynamics and impact. -14 LUFS is a reasonable single target if you're releasing to more than one platform at once, since it's close to what Spotify and YouTube both normalize toward.
What LUFS level should you use?
-14 LUFS (Streaming): a reasonable single target for releasing to multiple streaming platforms at once — close to Spotify's and YouTube's own normalization level.
-9 LUFS (Club): louder, matching common club and DJ mastering conventions where the material is played through a system built for a loud room rather than normalized playback.
-23 LUFS (Broadcast): the EBU R128 / ATSC A/85 standard used in TV and radio delivery — considerably quieter than either streaming or club targets.
Custom:useful when a specific platform, client, or delivery spec gives you an exact LUFS target that doesn't match any of the presets above.
Why two passes instead of one
A single-pass loudness correction estimates the needed adjustment in real time as it streams through the file — a reasonable approximation, but one that can miss the actual target by a noticeable margin on tracks with uneven loudness throughout. This tool always runs two passes: the first measures the track's true integrated loudness, peak, and dynamic range with the whole file already analyzed; the second applies the exact correction those measurements call for. The cost is one extra decode pass; the benefit is a result that actually lands on the target you asked for.
Want the fuller breakdown of LUFS vs. peak level, and why different platforms genuinely target different loudness levels? Read What Is LUFS, and Why Does Streaming Loudness Matter?
Common uses
Preparing a track for upload to Spotify, YouTube, or Apple Music at a competitive loudness level; mastering a DJ set or club track to a louder, dancefloor-appropriate level; delivering audio to broadcast at the EBU R128 standard; and matching loudness across a batch of tracks so a playlist doesn't have jarring volume jumps between songs.
Working from a raw mix that's too quiet or too loud overall before normalizing? The Volume Booster adjusts gain by a fixed decibel amount instead of a loudness-standard target, which is a simpler tool if you just need a quick gain change rather than accurate LUFS matching.
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