Loudness Analyzer and LUFS Normalizer online
- 100% Locally in browser
- No Uploads
- No Storing
- No Ads
Loudness Tool
Analyze and normalize your audio files. Everything runs locally in your browser.
-
by
Fabian
- last edited:18.03.2026
Troubleshooting
- File is not displayed. Make sure it is a valid audio file and not just a renamed file extension. Supported formats include WAV, MP3, FLAC, AAC, OGG, and M4A.
- Multiple files are not accepted. The tool processes one file at a time. If nothing happens, reload the page and try again.
- Analysis or normalization does not start. Check whether JavaScript is enabled in your browser. Try using a current browser such as Chrome, Edge, or Safari.
- Progress appears to be stuck. All processing runs locally in your browser. For long audio files, this may take some time. Wait until the process is complete.
- Processing is complete but download is not working. Check whether your browser is blocking downloads. Disable any popup or download blockers and reload the page.
- Very large file. Uncompressed formats like WAV can be very large. For long recordings, normalization may take several minutes. Close other programs to free up memory.
- File cannot be decoded. The audio file may be corrupted or contain an unsupported format. Re-export the file as a standard WAV at 16-bit or 24-bit.
- Processing stops on mobile devices. The page must remain in the foreground until processing is complete. Switching apps or locking the screen may pause the process.
- No download on iPhone or iPad. Long-press the download button and select Save to Files. Downloads may be blocked in private browsing mode.
- MP3 output sounds different from WAV. MP3 is a lossy compressed format. For the highest quality, select MP3 320k in the format options.
- Browser becomes slow or unresponsive. Large audio files require significant memory. Use a desktop browser for long recordings when possible.
- Normalized file does not appear. Reload the page and add the file again. Make sure the file has fully loaded before starting normalization.
Want to check the loudness of an audio file? And if it’s off, normalize it to the correct level.
With our Loudness Analyzer and Normalizer you can do that without any downloads. All processing runs directly in your browser. Your audio data never leaves your device.
Ideal for music productions, podcasts, voice recordings, or broadcast content where you need to adjust loudness.
Analyzing and Normalizing Loudness: Here's How It Works
- Select an audio file
- The analysis starts automatically
- Review the current loudness values
- Adjust the loudness if needed.
Which loudness should you choose?
The optimal loudness depends on the use case and platform. Target values for platforms and broadcast are:
YouTube: −14 LUFS
YouTube Shorts: −14 LUFS
Instagram: −14 LUFS
TikTok: −14 LUFS
Spotify Music: −14 LUFS
Spotify Podcasts: −14 LUFS
Apple Music: −16 LUFS
Apple Podcasts: −16 LUFS
Amazon Music: −14 LUFS
Audible: −18 LUFS
Broadcast / TV per EBU R128: −23 LUFS
Streaming platforms frequently normalize audio automatically. If your file is significantly louder or quieter than the target, this can lead to unexpected level changes. Proper normalization ensures consistent loudness.
Note: YouTube does not normalize audio louder! If your audio is too quiet, YouTube will not adjust it automatically. If it is too loud, it will be turned down to the target level.
| Platform | Target Loudness | Typical Use |
|---|---|---|
| YouTube | −14 LUFS | Videos and music content |
| YouTube Shorts | −14 LUFS | Short-form videos |
| −14 LUFS | Reels and social media videos | |
| TikTok | −14 LUFS | Short-form videos and social media content |
| Spotify Music | −14 LUFS | Music streaming |
| Spotify Podcasts | −14 LUFS | Podcast streaming |
| Apple Podcasts | −16 LUFS | Podcast platform |
| Apple Music | −16 LUFS | Music streaming |
| Amazon Music | −14 LUFS | Music streaming |
| Audible | −18 LUFS | Audiobooks and spoken word |
Why you should use our web app for your conversion
- No upload to external servers
- No storage of your files
- No sharing of audio data
- Full control over your content
What is loudness? And what is the difference to volume?
Volume usually describes the momentary level of a signal, for example in dBFS. It is a purely technical value.
Loudness describes how loud a signal is perceived over its entire duration.
This is why a file with lower peaks can still sound louder than another. Similarly, some files require volume adjustments because the loudness fluctuates. Commercials often sound louder because their loudness is higher.
Common measurements in loudness analysis:
Integrated LUFS
Average loudness over the entire file.
Short Term LUFS
Loudness over short time windows (3 seconds).
True Peak
Highest actual peak level after D/A reconstruction.
Loudness Range
A measure of dynamics — the difference between the loudest and quietest parts of the audio file.
These values help master audio consistently and in line with platform requirements.
Why loudness normalization is important
Without loudness normalization, audio content can have widely varying levels. This leads to a poor listening experience.
Common problems:
- Podcasts are too quiet (e.g. on YouTube)
- Processing (e.g. limiting) affects quality and tone
- Music is automatically turned down by platforms, which can alter the sound
- Voice recordings have significant loudness fluctuations
Proper normalization ensures:
- Consistent loudness
- Better intelligibility
- Platform-compliant audio levels
- Professional sounding productions
Most importantly, it means you can be confident that the platform won’t reprocess your file, and you retain full control over the sound. Every additional processing step means a loss of control.
If your song is too loud, the platform will turn it down and you lose dynamics in your mix. If it’s too quiet, some platforms won’t compensate. On YouTube for example, it simply stays too quiet.
Do you need to submit files in other formats?
Then check out our audio converter. You can use it to convert many other audio formats. It’s also free, ad-free, and has no data limits.
Frequently Asked Questions About the Loudness Analyzer and Normalizer
What is LUFS?
What is the loudness target for YouTube?
YouTube normalizes audio to −14 LUFS. If your audio is significantly louder than that, it will be automatically lowered. If it’s too quiet, YouTube won’t enhance it.
What is the loudness target for Social Media?
All social media platforms typically normalize audio to around −14 LUFS. If your audio is significantly louder than that, it will be automatically lowered.
Will my files be uploaded?
No. All analysis and processing takes place locally in your browser. Your files never leave your device.
Is there a file size limit?
Since no servers are involved, there is no traditional upload limit. The maximum file size depends on your device’s capabilities.
Does the Loudness Analyzer work on smartphones?
Yes. The tool works on modern browsers on Windows, macOS, Linux, iOS, and Android.
Does normalization affect audio quality?
Loudness normalization simply adjusts the volume level. If volume spikes occur during normalization, a limiter kicks in to ensure the target levels are met and prevent clipping. The audio quality is preserved as much as possible. You can adjust the limiter settings
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