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Volume Adjuster

Backing track too quiet, or recordings jumping between loud and soft? Drag to turn it up or down, or make everything equally loud in one tap. Clipping protection is on by default, so playback through speakers is less likely to distort.

  • No uploads
  • Log in to use
  • No usage limits
  • ¥0

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§ 01How-to

How do I adjust volume and match loudness online?

Choose a file and the page first measures its overall loudness and true peak, and tells you whether it's too loud or too quiet. Pick a target or drag the slider, then export.

  • Bring a quiet backing track to −14 for clearer speaker playback
  • Make recordings that jump between loud and soft equally loud
  • Bring podcasts and voiceovers to −16
  • Turn down audio that's too loud

  1. Choose a file

    Click the box above or drag in MP3, WAV, M4A or other audio; sound from videos works too. Within seconds you'll see the original loudness (LUFS) and true peak (dBTP).

  2. Pick a target, or drag the slider

    To sound close to platform playback volume, pick −14 under “Match loudness”; to just make it a bit louder or quieter, drag the slider under “Adjust volume”. The page estimates the processed loudness and peak live, so you can see at a glance whether it will clip.

  3. Export and preview

    Pick a format and export, then preview on the page before downloading. The file name includes the adjustment (e.g. “song-loudness-14LUFS.mp3”), so your original isn't overwritten.

§ 02FAQ
Q1What do LUFS and dBTP mean?
LUFS is overall loudness as the ear perceives it — the closer to 0, the louder; −14 is quite a bit louder than −20. dBTP is the true peak, how high the tips of the waveform reach; above 0 it clips and sounds distorted. After you choose a file, the page measures and shows both numbers.
Q2Should I pick −14, −16 or −23?
For short videos, music platforms and phone speakers, pick −14: many platforms play at around this loudness and turn down anything louder. For podcasts, audiobooks and voiceovers, pick −16. TV and radio often use −23. If unsure, pick −14.
Q3Will turning it up cause clipping?
“Match loudness”, and “Adjust volume” with “Clip protection” on, both keep peaks within −1 dBTP: only peaks that go over are gently pressed down, and everything else is simply turned up. If the target is so high that peaks need a lot of pressing, it may sound flatter — the page warns you in advance. With clipping protection off, a big boost can clip. Also, exporting to MP3 or M4A raises peaks by a few tenths of a dB during encoding, which is why the ceiling is −1 rather than 0.
Q4Can I push an already loud song even louder?
Not recommended. To avoid clipping, peaks can only be pressed down, so extra gain barely adds loudness and just squashes the dynamics. In that case the tool stops at a safe level instead of forcing it to the target; the export shows the loudness actually reached.
Q5Are files uploaded? Do I need to log in?
Nothing is uploaded. Log in to use it free with no usage limits; measuring and adjusting happen entirely in your browser, for audio up to 20 minutes. WAV and FLAC exports aren't compressed again; MP3 and M4A exports are re-encoded once.
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