1Upload the audio files whose level you want to change.
2Set a gain in decibels or as a percentage — positive to boost, negative to bring it down.
3Run it; headroom is checked first, so a boost that would clip is flagged rather than silently squared off.
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 set a gain in decibels or as a percentage and it is applied uniformly across the whole file.
Will boosting the volume distort the audio?
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Only if it clips. Headroom is checked before the file is written, so a boost that would push peaks past full scale is flagged rather than silently squared off. If the recording is quiet because it is noisy, boosting raises the noise too.
Do tags and cover art survive?
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Yes — ID3, Vorbis comments and MP4 atoms are carried across along with embedded artwork, so processed files still sort correctly in a music library.
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 200 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.
Will Adjust Audio Volume lower the quality of my audio files?
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It depends on the source. Lossless input (WAV, FLAC, AIFF) is edited sample-exactly and loses nothing. Lossy input has already discarded detail once, so where the job can be done by copying the encoded stream rather than re-encoding it, that is the path taken.
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, and nothing is retained: uploads are deleted from the workers shortly after the job finishes, and nothing is inspected, listed or indexed. Accounts exist for history and batch size only.
