Audio Converter
Convert audio to MP3, WAV, FLAC, AIFF, M4A or OGG in your browser, with trim, fade and normalise built in — no ffmpeg to install, no upload, no sign-up.
Drop audio or video files here or click to browse
🔒 Decoding and encoding both happen in this page — nothing is uploaded. Output is MP3, M4A (AAC), OGG (Opus), FLAC, WAV or AIFF. AAC and Opus come from your browser’s own encoder and the other four from code on this page; the containers are written here either way. The audio is re-encoded from decoded samples, so cover art and tags are not carried over.
Convert audio without uploading a thing
Drop an audio file, pick an output format, and download the result. Decoding uses the Web Audio API — your browser's own audio engine — so it opens whatever your browser can already play: almost always MP3 and WAV, usually M4A/AAC, and often OGG and FLAC. Every step runs on your device, so there is no ffmpeg to install and nothing to wait on a server for.
Six output formats, and what each is for
WAV and AIFF are uncompressed 16-bit PCM: lossless, and about 10 MB a minute in stereo. FLAC is lossless too and roughly half that. MP3 is the one everything plays, at any bitrate the format allows — 32 to 320 kbps for 32/44.1/48 kHz sources, 8 to 160 for the half-rate MPEG-2 range. M4A holds AAC and OGG holds Opus; both are encoded by your browser itself through WebCodecs, so no encoder is downloaded — and if your browser has no encoder for the one you picked, the page says so and names one that does rather than quietly writing something else.
Editing, and the limits it keeps
Before re-encoding you can trim the start and end, fade in and out, reverse, force mono or stereo, adjust the level or normalise the peak, and change the sample rate through a windowed-sinc resampler. Everything the tool cannot do honestly, it refuses: Opus holds only 8, 12, 16, 24 and 48 kHz, so a 44.1 kHz source is refused with those rates named rather than resampled behind your back, and AAC runs a few milliseconds longer than its source because it codes 1,024 samples at a time — the page says so on screen instead of hiding it. There is no mixing and no video handling.
Frequently asked questions
Which input formats can I convert?
Whatever your browser can decode through the Web Audio API — almost always MP3 and WAV, usually M4A/AAC, and often OGG and FLAC. Support varies by browser and operating system, so if a file can't be decoded you get a clear error instead of a broken download.
Is my audio uploaded to a server?
No. Decoding uses your browser's built-in audio engine and the encoding runs in JavaScript on your device, so the file never leaves your computer. Even private recordings stay local, and the tool keeps working offline.
Should I choose WAV or MP3?
WAV is uncompressed 16-bit PCM: lossless but big, roughly 10 MB per minute in stereo. MP3 is much smaller and lets you choose 128, 192 or 320 kbps. Pick WAV for editing or archiving, and MP3 for sharing or uploading.