Audio Volume Adjuster Online
Adjust the level of a recording with an explicit gain or normalize its highest sample to a selected peak. Clipping protection can limit amplification so the exported signal stays within the PCM range.
Local processing · No signup · PCM WAV output
- 01Add your recording
- 02Adjust & listen
- 03Export WAV
Audio Volume Adjuster workspace
Add a file, adjust settings, and export a standard WAV audio file.
Boosting beyond 0 dB may clip. Peak normalization scales the loudest sample; it is not loudness (LUFS) normalization.
Load audio to estimate output duration and WAV size.
Choose an audio file to begin.
How to use Audio Volume Adjuster Online
- Choose a mono or stereo audio recording.
- Set gain in decibels or enable peak normalization and choose a target. Leave clipping protection enabled unless you deliberately want hard clipping.
- Create the WAV and inspect applied gain, peak and any clipping warning. Listen before downloading.
When to use this editor
Make a quiet voice recording easier to hear or reduce the level of a loud clip. Raising gain can also raise background noise; sample-peak normalization does not perform noise removal or LUFS mastering.
Peak normalization is not loudness normalization
A peak target scales the highest absolute sample toward the selected percentage while using the same gain for both channels. It preserves their relative level. Perceived loudness depends on more than the highest sample, so two peak-normalized recordings can still sound different. Clipping protection caps requested gain when it would exceed full scale; without it, out-of-range samples are hard clipped and counted.
Worked example
Input peak: 50%; target peak: 95%
Normalization gain: 0.95 / 0.50 = 1.9
Approximately +5.58 dB.
Silent input stays silent.Choose manual gain or peak normalization deliberately
Normalization and manual gain are alternative calculations here. With peak normalization enabled, the target peak determines the gain; the manual gain slider is not added on top.
| Mode | Calculation used | Review |
|---|---|---|
| Normalization off | The selected gain in decibels | Clipping protection can cap the requested amplification. |
| Normalization on | Target peak divided by the measured input peak | A large existing peak can limit how much quieter speech is raised. |
- Use your own recording and decide whether you need a specific gain adjustment or a target sample peak.
- For a manual adjustment, turn normalization off and start with a modest gain. Keep clipping protection enabled when you want amplification capped at full scale.
- For normalization, select a target and render. Inspect the reported applied gain and listen to the result; a peak target does not establish perceived-loudness consistency.
- Check quiet passages and background noise as well as the loudest moment. Gain scales the entire recording, and this tool does not separate speech from noise.
Authored level-review workflow, not a supplied processed recording. The source preview is not proof of rendered gain. For independently balancing voice and music, use Audio Editor Studio. Use Trim Audio if unwanted material should be removed before level adjustment.
Formats and limits
No LUFS normalization, dynamic-range compressor, noise reduction or true-peak limiter is implemented. Eight-bit/16-bit PCM quantization and playback resampling can affect final peaks; the displayed peak describes the processed float samples before quantization. Listen for distortion and keep the original.
Up to 50 MiB per file, 20 merge tracks and 30 million channel samples for decoded input and rendered output. Compressed files expand during decoding; available device memory can impose a smaller practical limit. Cancellation terminates WAV encoding; an in-flight browser decode/render may finish internally before controls are released.
Audio processing uses built-in browser APIs and a local worker. These editors do not upload your audio or load external processing libraries. A WAV export creates a new file; your original is not modified.
Reference: Audio gain values.
Frequently asked questions
Why is applied gain smaller than the slider value?
With clipping protection enabled, amplification is capped so the largest processed sample does not exceed full scale.
Does normalization make every recording equally loud?
No. This is sample-peak normalization rather than a perceived-loudness or LUFS process.
Will quiet background noise also get louder?
Yes. Gain scales the whole recording. It does not separate speech from noise.
Peak normalization is not noise removal
Changing gain scales the recording, including background noise. Sample-peak normalization is different from perceived-loudness or LUFS matching. Inspect the reported gain and listen to the rendered WAV before keeping it.
Trim Audio Online - Cut Recordings to PCM WAV · Merge Audio Online - WAV with Gaps or Crossfades · Online Multitrack Audio Editor - Mix & Export