Instant, Reliable, Ad-Free - MP3 Converter Web Service. — convert WAV, AIFF and MP3 into clean, clean MP3 format in seconds, from your phone, tablet or laptop, on the go. Choose 320, 192 or 128 kbps, drop your files, and download — fast processing quality, no ads, nothing to install.
Upload your audio, choose your bitrate, and collect a distribution-ready MP3 in moments.
Even today, converting audio to MP3 is still a chore. Open files in apps, settings, and set the file properties for exporting them. We make the process much simpler. Wherever you are, on your phone or on the go, just upload your audio anywhere through our web services; we’ll handle the rest, instantly, 24hrs 365 days a year.
Upload your WAV, AIFF or MP3 straight from your browser — drop several to queue them.
320 kbps for best quality, or 192/128 for smaller files. Our studio pipeline encodes it cleanly.
Grab your distribution-ready MP3 in moments — ready for streaming, sending, or sharing anywhere.
Clean encoding, full control over quality, and none of the ads or quality loss you get from free online converters.
Clean, transparent encoding up to 320 kbps CBR from our own pipeline — your MP3 sounds like your source, not a generation down.
Optimised conversion. Drop it in and it just works — nothing to configure.
Choose 320, 192 or 128 kbps — full control, instead of one anonymous default.
Your files are yours. Processed securely and never sold, shared, or mined for ads.
No pop-ups, no fake download buttons, no bundled installers. Just the tool.
Drop multiple tracks to queue them, convert in one go, and download your MP3s together.
Create a free account and convert your first files on us. Need more? Go unlimited any time.
Yes — it's an easy web app, no install: open the page on your phone, tablet or laptop, upload from your device and download the converted MP3s right back to it. Convert on the go, wherever the files are.
Yes — create a free account and your first conversions are on us, at full studio-grade quality, no card needed. For regular or unlimited use there's a simple paid plan.
WAV, AIFF and MP3. Lossless sources like WAV and AIFF give the cleanest MP3, because the encoder starts from the full original signal.
MP3 is a compressed format, so some data is discarded — but at 320 kbps the difference is inaudible to almost everyone. Our pipeline encodes cleanly, without the muddiness cheap converters add.
320 kbps for the best quality (recommended for music), 192 kbps for a smaller file that still sounds great, 128 kbps for the smallest size.
Yes. Files are sent over a secure connection, used only to create your MP3, and deleted after conversion — never shared or reused.
No. It runs entirely in your browser — desktop or phone. Nothing to download or install.
Create your account in seconds and hear the ST Mastering difference for yourself.