Normalize Audio Volume
Adjust audio volume to optimal levels
Audio or video file
Audio analysis
- Peak level
- N/A
- RMS level
- N/A
- Dynamic range
- N/A
Result
Your result appears here.
- New peak level
- New RMS level
- Gain applied
Choose a file to begin.
Good to know
- The whole file is scaled so its loudest sample reaches the target peak level. This is peak normalization, not loudness (LUFS) matching.
- The result is a 16-bit WAV; video files give their audio only.
- Need an MP3? Convert the WAV with the WAV to MP3 Converter.
- The file is named after your file with _normalized.wav at the end.
About Audio & Video Volume Normalizer
Our free audio normalizer tool analyzes and adjusts the volume levels of your audio and video files to achieve consistent, professional-sounding output. Whether your recording is too quiet or too loud, this volume normalization tool scales the whole file so its loudest peak hits the target you choose, with presets for podcasts, music, YouTube videos, and more.
This online audio leveler supports both audio files (MP3, WAV, AAC, FLAC, M4A) and video files (MP4, MOV, AVI), automatically extracting audio from video for processing. The tool provides detailed analysis including peak level, RMS level, and dynamic range measurements in dB, along with waveforms of the original and normalized audio.
Your files stay on your device and are never uploaded to any server, making this a privacy-first volume normalizer that keeps your content completely secure. The tool also includes an optional soft limiter for increased perceived loudness without clipping.
Key Features
- Peak normalization with adjustable target level from -30 dB to -1 dB
- Support for both audio (MP3, WAV, AAC, FLAC, M4A) and video (MP4, MOV, AVI) files
- Automatic audio extraction from video files
- Waveform displays for the original and normalized audio
- Detailed audio analysis: peak level, RMS level, and dynamic range in dB
- Preset peak targets of -18, -14, -12, -10 and -1 dB
- Optional soft limiter for increased perceived loudness without hard clipping
- Before-and-after comparison with side-by-side playback controls
- Drag-and-drop file upload with format validation
- 16-bit WAV output (video files give audio only)
How to Normalize Audio Online
- Upload your file: Click "Choose File" or drag and drop an audio or video file into the upload area. The tool accepts files up to 200MB in formats like MP3, WAV, FLAC, MP4, MOV, and more.
- Review the analysis: The tool automatically analyzes your file, showing peak level, RMS level, and dynamic range with color-coded indicators. It also generates a waveform display of your original audio.
- Set your target level: Use the slider or preset buttons to choose your desired peak normalization level. Common choices are -18 dB for voice and -12 dB for music; -1 dB brings the loudest peak just under full scale.
- Enable the limiter (optional): Check the "Loudness boost" option to apply a soft limiter that increases perceived loudness, recommended for music and streaming content.
- Normalize and compare: Click "Normalize Audio" to process the file. Compare the original and normalized versions using the built-in players and waveform displays.
- Download the result: Click "Download Normalized Audio" to save the processed WAV file to your device.
Use Cases
- Podcast production: Ensure consistent volume levels across episodes and between different speakers for a professional listening experience.
- YouTube content: Raise quiet video audio to a set peak level, then put the WAV back into your video in your editor.
- Music mastering prep: Bring tracks to a consistent peak level before sending them to a mastering engineer or uploading to streaming services.
- Audiobook narration: Bring every chapter of a long recording to the same peak level.
- Lecture recordings: Raise quiet recordings from classrooms, webinars, or conference presentations.
- Radio broadcast: Set a consistent peak level before final loudness checks; peak normalization alone does not meet broadcast standards such as EBU R128.
- Video editing: Extract and normalize the audio from video files before final export.
Frequently Asked Questions
What normalization level should I use?
It depends on your use case. Use -18 dB for voice and podcasts, -12 dB for music, or -1 dB for maximum peak level. These are peak levels: -14 dB here is not the -14 LUFS loudness target used by streaming platforms. The preset buttons make it easy to choose.
What does the soft limiter do?
The soft limiter gently rounds off the loudest peaks so quieter parts come up, which changes the final peak level. This increases perceived loudness without introducing hard clipping artifacts, making your audio sound louder and fuller.
Can I normalize video files?
Yes, the tool accepts video files like MP4, MOV, and AVI. It automatically extracts the audio track, normalizes it, and outputs the result as a WAV file that you can then recombine with your video.
Does normalization reduce audio quality?
Normalization changes the overall gain only. The output is an uncompressed 16-bit WAV file, so no lossy compression is added; the optional loudness boost does change the dynamics.
Tips & Best Practices
- Check your peak levels first: Review the audio analysis before normalizing. If peak and RMS levels are already near your target, normalization may not be needed.
- Use preset targets: Click a preset button (-18, -14, -12, -10 or -1 dB) to quickly set the target peak level.
- Enable the limiter for music: The soft limiter is especially useful for music and streaming content where you want maximum perceived loudness without distortion.
- Compare before and after: Use the dual playback controls and waveform displays to carefully compare the original and normalized audio before downloading.
- Normalize at the right stage: Apply normalization as one of the final steps in your audio workflow, after editing and before final export or distribution.
- Convert to MP3 if needed: The output is WAV for quality. Use our WAV to MP3 converter tool if you need a compressed format for sharing or uploading.