Upload a WAV file and get a MP3 back. No signup, no watermark, no limit on how many.
WAV is raw, uncompressed PCM in a Microsoft container: the audio exactly as it was sampled, with nothing clever done to it.
Where you run into it: Recording sessions, sample libraries, video editors, anything that has to be edited rather than merely listened to.
What it costs you: It is enormous — roughly 10 MB a minute in CD-quality stereo — and it carries almost no tagging, so a folder of WAVs is a folder of filenames.
MP3 is the format that made portable music work, and thirty years on it is still the one every device, car stereo, DAW and browser will open without being asked twice.
Where you run into it: Downloads, podcast feeds, old music libraries, anything a client sends you and expects you to just play.
What it costs you: It throws audio away to get small, and at 320 kbps almost nobody can hear what went. What matters is that the discarded part never comes back.
This is the conversion the whole format exists for: your WAV holds every sample, and MP3 throws away the ones a listener will not miss in exchange for a file a tenth of the size. Two things about your WAV stop mattering the moment you press Convert. Bit depth is one — a 24-bit take and a 16-bit take of the same recording produce MP3s of identical size, because the encoder works in its own arithmetic and never sees your bytes. The other is that a WAV has nothing to hand over but audio, so what you get back is a tagless file named after whatever you uploaded.
This is the deliverable step, and it is usually the last thing you do to a file. Podcast hosts, radio submission forms, client review copies and anything going up on a website all expect MP3, and a WAV is what your session bounced. Two practical points. Keep the WAV — it is the only copy that can be encoded again later at a different rate, and once you have deleted it the MP3 is your master whether you like it or not. And tag the MP3 before you send it anywhere: nothing came across from the WAV, so unless you fill in artist and title, the file arrives anonymous.
Yes, entirely, and there is no cap on how many files you convert. No account, no watermark, no trial.
Yes, deliberately, and the setting is the only thing you actually control here. Best means variable bitrate: the encoder spends generously through a dense mix and sparingly through a quiet passage, which on most material gives a smaller file than a flat 320 kbps for the same result. Pick a fixed rate instead only when something downstream demands one. Going below 192 kbps is where a 24-bit studio WAV starts to sound like a copy of itself rather than a smaller version of itself.
Around a tenth of the WAV at Best, so a 40 MB four-minute export lands near 4 MB. The exact figure moves with the music rather than with the source file, which is the part that catches people out: two WAVs of identical size can produce MP3s that differ by half, because one is a dense master and the other is a solo voice with room around it.
Yes — MP3 is one of the formats this converter writes, so the reverse page exists at /mp3-to-wav/. Be clear about what comes back, though: the WAV you get is a faithful copy of the MP3, not of the original. The loss happened on the way out, and returning to a lossless format stops further loss rather than undoing it. Keep the original WAV if you still have it.
The file is uploaded to do the conversion — nothing here runs in your browser — and both your upload and the converted result are deleted the moment the file is sent back. Nothing is stored and nothing is logged beyond the request itself.