Use the free WAV Sample Rate Converter below: your data never leaves your browser — all work happens on your device, and nothing is uploaded to any server.
What sample rate means, without the jargon
Digital audio is a series of snapshots of a sound wave. The sample rate is how many snapshots are taken every second. A rate of 44100 Hz means 44100 snapshots per second. A rate of 48000 Hz means 48000. More snapshots can capture higher frequencies, but they also make bigger files. That is the whole trade-off. The sample rate does not decide whether a recording is good. A great performance at 22050 Hz beats a bad performance at 96000 Hz every time. The rate only decides compatibility and file size, and that is exactly why you sometimes need to convert it.
The numbers you see in this tool are not random. 8000 Hz is the rate of old telephone audio, and it is still used for phone systems. 16000 and 22050 Hz are common for speech and voice assistants. 44100 Hz is the CD standard, and most music lives there. 48000 Hz is the video standard, and most cameras, video editors and streaming platforms expect it. 96000 Hz is used in professional studios. When a device or a project demands one rate and your file has another, conversion is not optional. The file simply will not play, or the editor will convert it badly without telling you.
Why converting yourself beats letting an editor guess
Most video editors will accept a mismatched file and silently resample it in the background. That usually works, but you have no control over the quality, and if the editor resamples every time you open the project, you pay the cost in export time again and again. Converting once, here, gives you a finished file at the exact rate your project wants. Drop it in, and the editor stops guessing. Podcast producers have the same habit: they standardise every guest recording to one rate before editing, so cuts between guests never glitch.
There is also a file size benefit when you convert down for speech. A lecture at 48000 Hz stereo is far bigger than the same lecture at 16000 Hz mono, and for spoken words the listener cannot tell the difference on a phone speaker. If you are storing hundreds of hours of lectures, interviews or voice notes, converting down saves real disk space. Just keep the original somewhere safe, because converting down throws away high frequencies permanently, and you cannot get them back by converting up again.
How to use this converter
Upload your file. The tool reports its current sample rate, so you know your starting point. Choose the target rate from the list. If you are making audio for video, choose 48000 Hz. If you are making audio for a music project, choose 44100 Hz. If you are making audio for a phone system, check what the system asks for, because phone systems are the pickiest of all. Press Convert, check that the duration stayed the same, play the result, and download the WAV. The duration check is your proof that the conversion worked: resampling changes the number of samples, not the length of time.
Under the hood, the tool renders your audio through an offline audio context running at the new rate. That is a real resampling process, not a trick where the file header is relabelled. A relabelled file would play at the wrong speed, because the player would read the same samples at a new rate. A properly resampled file plays at the correct speed, with the correct number of samples for its duration at the new rate. The WAV you download has the new rate written in its header and the matching sample data to go with it.
Converting up does not add quality
This is the most common misunderstanding about sample rates, so it is worth stating plainly. If your recording was made at 22050 Hz, it contains no frequencies above about 11000 Hz, because a sample rate can only capture frequencies up to half its value. Converting that file to 96000 Hz does not invent the missing high frequencies. It just draws more snapshots of the same limited sound. The file gets bigger, and nothing gets better. Convert up only when a device demands it, never because you hope the sound will improve. Convert down only when you accept that the highest frequencies are gone for good.
Common questions
Will conversion change the pitch? No, if it is done properly, and this tool does it properly. A pitch change means the samples were relabelled, not resampled. Will it change the length? No, the duration stays the same within rounding. Is my file uploaded? No. The resampling runs in your browser, and the WAV download is the only copy that leaves it.