1Upload the audio files whose level you want to change.
2Move the volume slider: above 100% makes the file louder, below 100% makes it quieter.
3Run it; the whole file is raised or lowered by the same amount, so a large boost can make loud passages clip.
4Download the adjusted Audio file.
Adjust Audio Volume FAQ
Does the source format matter?
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It does. this format is read and written by the same streaming pipeline as everything else we support. That decides whether a gain change is an exact edit of the samples or has to go through a re-encode.
Anything specific to Audio to know?
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Yes — the codec is detected from the stream, so a mislabelled extension does not derail the job. Relevant if you plan to adjust the level more than once.
How does Adjust Audio Volume change the level?
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Concretely, the gain is applied after decode and written back in the source format, with clipping checked before the file is written. You move the volume slider, where 100% leaves the level unchanged, and the change is applied evenly across the whole file.
Which audio formats does Adjust Audio Volume accept?
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MP3, WAV, AAC, M4A, FLAC, OGG, Opus, WMA and AIFF. Codecs are detected from the stream rather than the extension, so a mislabelled file still works and a mixed batch is handled per file.
Is there a file size limit on Adjust Audio Volume?
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Yes: free accounts process audio up to 15 MB per file whichever codec you brought; ffmpeg handles the decode and encode. In practice that limit only bites on uncompressed WAV; a compressed file of the same length is nowhere near it.
Why would a modern-format site run Adjust Audio Volume?
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WEBP.to is built around the modern replacement for both of the old defaults: one format that does lossy, lossless, alpha and animation, and reliably lands smaller than the JPEG or PNG it came from. People arrive here having decided the old defaults are costing them bandwidth, and that decision immediately raises the rest: what size, what quality, what happens to the transparency. Adjust Audio Volume is on the same upload and the same account so those questions get answered in one place.
Once Adjust Audio Volume has run, what is worth doing next?
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The converter on this site moves images to and from WebP, PNG, JPG and AVIF, which is where you decide whether a smaller file is worth losing the older browsers. Doing it in that order matters: pick the pixels first and the container afterwards, because the container is the cheap decision and the pixels are the expensive one.
Do the sibling sites run something different?
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The engines are identical — same libraries, same workers, same caps. What is different is the opinion attached, and the opinion here rests on a property of the format this site is named after: the same .webp extension can hold a lossy VP8 frame, a lossless one, or an animation, so the sensible processing path is decided per file rather than per extension.
What happens to my file, and is an account required?
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No account is needed. Uploads and results are kept for about 24 hours, which leaves time to download the result, and are then deleted automatically; nobody reads, lists or indexes them. Several files in one job need a paid plan.
