Frequently asked questions
Are my files uploaded anywhere?
No. Your audio is decoded, adjusted and re-encoded entirely in your browser on your device. Nothing is ever sent to a server.
What is the difference between the three modes?
Set level applies a fixed volume change you choose, like making something twice as loud. Peak normalize raises the whole track so its loudest moment just reaches a safe ceiling, which is the safest way to make audio louder without clipping. Even out loudness aims for a consistent perceived loudness using an average-level estimate, which is handy for matching several clips.
Is "Even out loudness" the same as LUFS normalization?
Not exactly. It uses an RMS (average level) estimate, which is close in spirit to loudness normalization and good for matching clips, but it is not a full LUFS meter with frequency weighting like broadcast tools use. For most everyday needs it works well, and a limiter keeps it from clipping.
Will making it louder cause distortion?
Peak normalize never clips because it stops at the ceiling you choose. When you push the level higher than the audio can hold in Set level or Even out loudness, a limiter clamps the loudest peaks so it does not overflow, which can slightly flatten very loud moments. Leaving a little headroom, like a -1 dB ceiling, avoids playback issues.
Which formats can I open and save?
You can open common audio like MP3, WAV, M4A, OGG and FLAC, as long as your browser can decode it. You can save as MP3, M4A, WAV, OGG or FLAC; WAV and FLAC keep full quality.
Is there a size limit?
One file at a time, up to 1 GB. Adjusting volume loads the whole file into memory on your device, so very long files may be slow or run out of memory on a phone or older machine.