1
Upload Your Audio File
Drag and drop or click to browse. We support MP3, WAV, FLAC, OGG, AAC, and M4A formats directly in your browser.
Professional broadcast loudness analysis & normalization. Client-side processing — your audio never leaves the browser.
Master your audio for any destination with our free online LUFS Normalizer. Built on the EBU R128 standard, this loudness analyzer measures Integrated LUFS, Loudness Range (LRA), True Peak dBTP, and Momentary levels in real time. Whether you're producing podcasts for Apple Podcasts, mixing music for Spotify and YouTube, or preparing broadcast content for television and radio, our client-side audio tool ensures your tracks meet every platform's loudness specification — without ever uploading files to a server.
Drag and drop or click to browse. We support MP3, WAV, FLAC, OGG, AAC, and M4A formats directly in your browser.
Click "Analyze Loudness" to scan your track. Get precise readings for Integrated LUFS, True Peak, Momentary Max, Short-Term Max, and Loudness Range.
Choose from preset platform targets — EBU R128 Broadcast (-23), Apple Podcasts (-16), Spotify / YouTube (-14), or Amazon / AES (-12).
Hit "Normalize Audio" to apply gain, enforce True Peak limiting, and download your broadcast-ready WAV file instantly.
| Platform / Standard | Target LUFS | True Peak Limit | Best For |
|---|---|---|---|
| EBU R128 Broadcast | -23 LUFS | -1 dBTP | TV, Radio, Professional Broadcast |
| Apple Podcasts | -16 LUFS | -1 dBTP | Podcasts, Spoken Word, Voiceover |
| Spotify / YouTube | -14 LUFS | -1 dBTP | Music Streaming, Video Content, Social Media |
| Amazon / AES | -12 LUFS | -1 dBTP | Audiobooks, Loudness-Heavy Delivery |
All audio processing happens client-side in your browser. Your files are never uploaded to any server, ensuring complete privacy for unpublished tracks and sensitive recordings.
Engineered to the European Broadcasting Union standard for accurate Integrated, Momentary, Short-Term, and Loudness Range measurements with K-weighting filters.
Optional 4x oversampled brickwall limiting protects your audio from inter-sample peaks, keeping distortion at bay while maximizing perceived loudness.
Upload MP3, WAV, FLAC, OGG, AAC, and M4A files. The built-in decoder handles variable sample rates and channel configurations automatically.
Toggle instantly between your original and normalized audio to hear the difference before you export. Waveform visualization shows the gain change graphically.
Stop guessing. Built-in presets for Broadcast, Podcasts, Spotify, YouTube, and Amazon automatically set the correct LUFS target and True Peak limit for your delivery destination.
LUFS stands for Loudness Units relative to Full Scale. Unlike traditional dB meters that measure peak or RMS levels, LUFS measures perceived loudness the way human ears actually hear it. Streaming platforms like Spotify, Apple Music, and YouTube use LUFS to normalize playback volume, meaning if your track is too loud or too quiet, the platform will automatically adjust it — often poorly. Mastering to the correct LUFS target ensures your audio sounds exactly as intended across every speaker and platform.
Decibels (dB) measure electrical or digital signal level, while LUFS measures subjective loudness over time. A track can have high dB peaks but still sound quiet, or have moderate peaks yet sound loud due to compression. LUFS accounts for frequency response and duration, making it the industry standard for loudness normalization in broadcasting and streaming.
Spotify and YouTube normalize content to approximately -14 LUFS integrated. We recommend targeting -14 LUFS with a -1 dBTP true peak limit for music delivered to these platforms. This gives you competitive loudness without excessive compression, preserving dynamic range while preventing the platform's algorithm from aggressively turning your track down.
Absolutely not. This LUFS normalizer is a fully client-side application. Your audio file is decoded, analyzed, and processed entirely within your web browser using the Web Audio API. No data is transmitted to any external server, making this tool completely private and secure for unreleased music, confidential voiceovers, and proprietary content.
True Peak measures the actual analog peak level of your audio, including inter-sample peaks that regular peak meters miss. When digital audio is converted to analog or processed by lossy codecs, peaks can exceed 0 dBFS and cause clipping distortion. A True Peak limit of -1 dBTP provides a safety margin that prevents distortion on any playback system, which is why it is mandated by EBU R128 and recommended by all major streaming services.
Yes. Simply select the "Apple Podcasts" preset (-16 LUFS, -1 dBTP) or enter -16 manually. This is the loudness standard recommended by Apple for podcast submissions. It ensures spoken-word content is clear and consistent across episodes while leaving enough headroom for music intros and ads.
The tool supports all major browser-decodable formats including MP3, WAV, FLAC, OGG, AAC, and M4A. Both mono and stereo files are supported, and the analyzer automatically adapts to your file's sample rate for accurate EBU R128 measurement.
Yes. The LUFS Normalizer is 100% free with no registration, watermarks, or export limits. Use it as often as you need for broadcast compliance, podcast mastering, music distribution prep, and video post-production.
Upload your track above and normalize to broadcast-standard loudness in seconds. No software to install, no account required, and your audio never leaves your device.