LUFS Loudness Normalizer Online
Hit −23, −16, or −14 LUFS targets for broadcast, podcast, or streaming. K-weighted measurement, peak-safe output, all in your browser.
Pick the Right LUFS Target
Each platform expects a different loudness — match it once and your audio sounds right everywhere.
EBU R128 Broadcast
European broadcast standard. Used by BBC, ZDF, France TV. The strictest target — gives the most headroom for drama and dynamic content.
Podcast
Apple Podcasts and Spotify Podcasts target. Loud enough for listeners on phones in noisy environments without sounding compressed.
Music Streaming
Spotify, YouTube, Tidal master target. Mastered music expects this level. Going louder triggers downward gain on these platforms.
Why Notevibes LUFS Normalizer
K-weighted measurement, peak-safe output, instant.
3 Industry Targets
−23 LUFS for EBU R128 broadcast, −16 LUFS for podcasts, −14 LUFS for streaming. One click each.
K-Weighted Measurement
ITU-R BS.1770 approximation via highshelf + highpass filtering. Accurate to ±0.5 LU on speech and music.
Privacy First
Audio is processed locally in your browser. Nothing is uploaded.
Any Audio Format
MP3, WAV, M4A, FLAC, OGG, AAC up to 200 MB.
No Inter-Sample Clipping
Output peak clamped at ±0.99 prevents both digital and inter-sample clipping after gain.
Works on Mobile
Normalize loudness on any phone or tablet. iOS, Android, all major browsers.
Your Audio Stays on Your Device
Every file is processed locally in your browser. Nothing is uploaded.
No Upload
File never leaves your device
No Account
Start normalizing immediately
No Tracking
We never see your audio
When to Use a LUFS Normalizer
Most files process in under a minute.
Podcast publishing
Hit Apple/Spotify −16 LUFS so episodes match every other show
Audiobook delivery
Match ACX loudness specs (−23 to −18 LUFS depending on platform)
Music master prep
Hit Spotify's −14 target so tracks aren't downward-leveled
YouTube voiceover
Reach −14 LUFS for YouTube's preferred speech loudness
Broadcast handoff
Stay in EBU R128 spec (−23 LUFS ±1 LU) for radio/TV submissions
Album consistency
Make sure every track on a release lands at the same target
Need Limiting + Loudness Together?
The Notevibes Audio Editor stacks limiter, normalizer, EQ, and effects — process whole tracks with stacked operations and metering.
Open Full Audio EditorFrequently Asked Questions
What is LUFS?
LUFS (Loudness Units relative to Full Scale) is the modern standard for measuring perceived loudness, defined by ITU-R BS.1770 / EBU R128. Unlike peak normalization (which only looks at the loudest sample), LUFS approximates how loud humans actually perceive audio — closer to dB SPL.
What are the standard LUFS targets?
−23 LUFS = EBU R128 (European broadcast). −16 LUFS = podcast platforms (Apple Podcasts, Spotify Podcasts). −14 LUFS = music streaming (Spotify, YouTube, Tidal). Below those targets, platforms apply downward leveling; above, they may apply lossy attenuation.
How is this different from peak normalization?
Peak normalization scales audio so the loudest sample sits at a target dB (typically −1 dB). It does not account for perceived loudness — a quiet podcast and a heavy compressed song can both peak at −1 dB but feel very different in volume. LUFS targets perceived loudness instead. For peak normalization, use the classic Audio Normalizer.
Why is the LUFS measurement an approximation?
True ITU-R BS.1770-4 uses K-weighting (a specific shelf + high-pass curve) and gated 400 ms blocks. This tool uses BiquadFilter approximations of K-weighting and ungated mean-square measurement — accurate to within ±0.5 LU on speech and music. Plenty for matching to streaming targets.
Will the output clip after normalization?
No — output is clamped at ±0.99 to prevent both digital and inter-sample clipping. If your input has loud peaks, run it through a limiter first to control transients before normalizing.
Is the LUFS normalizer free?
Yes. Completely free with no sign-up, no watermark, and no limits. Max file size is 200 MB.
Is my audio file uploaded to a server?
No. The normalizer runs entirely in your browser. Your file never leaves your device.
What audio formats are supported?
MP3, WAV, M4A, FLAC, OGG, and AAC. Anything your browser can decode will load. Output is exported as a 192 kbps MP3.
Can I create audiobooks with Notevibes?
Yes. The AI audiobook generator turns your EPUB, Kindle, or PDF into a narrated audiobook with character detection, 550+ voices, and ACX-compliant volume normalization built in.