How it works
Select the destination rate. Web Audio decodes and resamples the file at that rate. The result preserves duration, not the original encoded bytes.
Worked example
One second at 44.1 kHz contains 44,100 frames; at 48 kHz it contains 48,000. Merely relabeling a WAV header would change speed — this tool resamples the audio instead.
Read the result
Resampling constructs samples on a new time grid while preserving duration. Simply changing a header's sample-rate number would change playback speed instead. This tool asks Web Audio to decode at the selected rate, then exports actual PCM at that rate.
Common mistakes
Do not increase sample rate expecting missing bandwidth or lossy detail to reappear. Avoid repeated conversions when the destination accepts your original. Check the receiving application's requirements before choosing a rate.
Questions musicians ask
What is resampling audio?
Resampling represents the waveform at a different number of sample frames per second. It requires signal processing, not just a filename or header change. Browser implementation and source decoding affect the result.
Does sample rate affect file size?
For fixed duration, channels and PCM bit depth, payload size scales with sample rate. The file-size calculator shows that relationship. Compressed formats have additional codec-dependent behavior.
Does sample rate affect sound quality?
It can affect representation and conversion behavior, but a higher number is not a universal audible upgrade. Resampling cannot recover information absent from the source. Use the rate required by your workflow and compare the actual output.
Sources and calculation notes
From measurement to mastering
Understand the measurement, then compare your own mix and reference. Your ears remain the final judge.