Free tool · runs in your browser

Audio Volume Changer

Boost or attenuate any audio file by a precise number of decibels or a plain multiplier, entirely in your browser. The tool shows the equivalent value in the other unit in real time, warns when a boost risks clipping, and never uploads your file.

How to use this tool

  1. 01

    Upload your audio

    Drop in or choose any format FFmpeg supports — it's processed locally and never uploaded.

  2. 02

    Pick mode

    dB change for precise, broadcast-style control, or Multiplier for an intuitive 2× / 0.5× adjustment.

  3. 03

    Enter the change

    Positive dB or a multiplier above 1× boosts; negative dB or below 1× reduces.

  4. 04

    Convert and check

    Apply the gain, then listen for clipping — if it sounds distorted, lower the boost and run it again.

Why this matters

Mismatched levels are the single most common audio problem in user-generated content — an interview recorded too quietly, a music bed that's way too hot under narration, a screencast where the voice is barely audible next to the system sounds. One precise gain adjustment fixes the majority of these without touching a full editor.

Most online volume tools either upload your file or only offer a couple of fixed presets. This one runs entirely in your browser and speaks both languages — decibels, the unit every DAW and broadcast spec uses, and a plain multiplier — so the change translates predictably to the rest of your pipeline. Chain it with the Audio Fade In/Out tool to also smooth an interview's intro and outro in a second quick pass.

Related tools

Video to MP3

Extract the audio track from any video as a clean MP3 file. Pick bitrate, trim start and duration, preview before download — all in your browser.

Open tool→
Audio Converter

Convert audio between MP3, WAV, M4A/AAC, OGG, and FLAC right in your browser. Set a bitrate for lossy formats or a sample rate for lossless. No upload, free.

Open tool→
Audio Trimmer

Trim audio to a precise start and end with HH:MM:SS inputs and lossless stream-copy — all in your browser. No upload, no quality loss, no signup.

Open tool→

FAQ

dB is the unit professional audio works in because it's logarithmic, matching how we actually perceive loudness — a +6 dB step sounds like a consistent jump whether the source is quiet or loud, and it's how broadcast and DAW specs are written. The multiplier is more intuitive for quick math: 2× is twice the amplitude, 0.5× is half. Use dB when you're matching a target or working alongside other audio tools; use the multiplier when you just want a rough, obvious change.

Explore the full toolkit

94 free tools covering titles, tags, thumbnails, scripts, captions, embeds, schema, and in-browser video processing.

Browse all tools →