Client-Side PDF Toolkit
100% Client-Side PDF processing. No server uploads.
About Audio Volume Normalizer
The Audio Volume Normalizer & Loudness Matcher normalizes audio levels across tracks using standard Peak Normalization (0 dBFS / -0.1 dBFS) or EBU R128 / ITU-R BS.1770 LUFS Integrated Loudness normalization (-14 LUFS Spotify, -16 LUFS Apple Music, -23 LUFS Broadcast).
How to Use Audio Volume Normalizer
Step 1
Upload an audio file (WAV, MP3, OGG).
Step 2
Select a loudness target preset (e.g. -14 LUFS Spotify or Peak -0.1 dBFS).
Step 3
Review computed LUFS gain adjustments.
Step 4
Click "Normalize and Download".
Practical Use Cases for Audio Volume Normalizer
Mastering Audio for Spotify, Apple Music & YouTube Streaming (-14 LUFS)
Normalize music and podcast master tracks to standard streaming targets (-14 LUFS) to prevent automatic platform volume attenuation.
Balancing Uneven Voiceover & Dialogue Levels
Boost quiet speaker recordings without distorting loud peaks using True Peak brickwall limiting.
Input & Output Examples
Normalizing Podcast Track to -16 LUFS (Apple Podcasts Standard)
Audio: `podcast_ep1.wav` (Current: `-22.4 LUFS`, True Peak: `-3.1 dBFS`)
Normalized Audio: `-16.0 LUFS` (Target Matched) | Gain Applied: `+6.4 dB` | Zero Clipping
Key Features & Performance
- ✓Target Standards: Spotify/YouTube (-14 LUFS), Apple Podcasts (-16 LUFS), Broadcast EBU R128 (-23 LUFS), Peak 0 dBFS, Peak -1.0 dBFS.
- ✓Computes: Integrated LUFS, Loudness Range (LRA), Momentary Max, and True Peak (dBFS).
- ✓Built-in transparent lookahead brickwall limiter prevents digital distortion.
- ✓100% Client-Side Web Audio DSP engine.
- ✓1-Click Download normalized audio.
Key Terminology & Definitions
LUFS (Loudness Units Full Scale)
An international standardized measurement of perceived audio loudness taking human ear frequency sensitivity into account.
Peak Normalization
Scaling the entire audio track linearly so the highest single sample peak reaches a specified maximum level (e.g. 0 dBFS).