Increase Volume & Normalize LUFS (Free)
Raise or lower the volume of an audio file, or match it to a loudness standard (LUFS) used by YouTube, Spotify, podcasts and broadcast.
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A recording that is too quiet gets skipped and one that is too loud distorts. Loudness matching measures how loud your audio really sounds and sets it to the level each platform expects.
When to use it
- Make a quiet phone recording audible
- Match a podcast episode to -16 LUFS
- Prepare music or narration for YouTube or Spotify at -14 LUFS
- Even out levels between clips before merging
How to use
- Add an audio or video file.
- Check the current loudness shown under the waveform.
- Either set a gain in dB, or pick a target (-14, -16, -19, -23 LUFS) and press Normalize to this target.
- Listen to the result; the before and after values are shown.
- Choose a format and save.
Supported formats and limits
- Input: mp3 · wav · m4a · ogg · flac · aac · mp4 · webm and more
- Output: MP3, WAV, FLAC, M4A/M4R (when supported)
- Loudness: ITU-R BS.1770-4 integrated loudness with gating; true peak limited to -1 dBTP
- Presets: -14 (YouTube, streaming), -16 (podcast), -19 (mono podcast), -23 (broadcast EBU R128)
Tips
- If the target can't be reached without clipping, the limiter keeps peaks at -1 dBTP so the result may land slightly lower.
- For a full loudness report with LRA, use the Loudness Meter tool.
FAQ
What is LUFS?
LUFS measures perceived loudness over the whole file. Streaming services and podcasts use it to keep tracks at a similar level.
Which target should I choose?
-14 LUFS for YouTube and music streaming, -16 LUFS for most podcasts, -19 for mono podcasts and -23 LUFS for broadcast (EBU R128).
Will boosting the volume cause distortion?
The normalize option limits true peaks to -1 dBTP to avoid clipping. Plain dB gain can clip if you push it too far, so listen before saving.
Are my files uploaded?
No. Measuring and processing happen in your browser.