Just Tool It
Just Tool It / Audio Converter
On-device — nothing uploaded

Audio to WAV Converter

Drop an MP3, OGG, FLAC, M4A, Opus or AIFF file and download a lossless WAV. Optional resample, channel mix, trim and normalize controls.

Drop an audio file here

or browse from your device — MP3, WAV, OGG, FLAC, M4A, AAC, Opus, AIFF

Convert audio to lossless WAV without uploading

Most online audio converters upload your file to a server, run an encoder there, and email you a download link. The round-trip is slow and exposes your recording to a third party. Just Tool It decodes the audio inside your browser using the built-in Web Audio API and writes a WAV file locally. The original file never leaves the tab.

What you can convert

Any audio format your browser can decode is accepted as input — typically MP3, WAV, OGG, FLAC, AAC, M4A, Opus and AIFF on modern Chrome, Firefox, Edge and Safari. The output is WAV (RIFF / PCM), the de-facto lossless format for editing, archiving and sharing with audio software.

  • Bit depth: 16-bit (CD quality), 24-bit (studio), or 32-bit float (editing master).
  • Sample rate: 8 kHz → 96 kHz, or keep the original.
  • Channels: keep, downmix to mono, or upmix to stereo.
  • Trim: set a start and end in seconds.
  • Normalize: rescale the peak to −1 dBFS so quiet files come out loud enough.

How to use

  1. Drop an audio file onto the upload area, or click to browse.
  2. Pick a bit depth and sample rate. 16-bit at the original rate is the safe default.
  3. Optionally trim or downmix. Useful for podcasts, voice notes or sample preparation.
  4. Click Convert to WAV, then Download WAV.

Frequently asked questions

Is my audio uploaded anywhere?
No. The file is decoded by your browser's Web Audio engine, processed in memory, and re-encoded as WAV using a small JavaScript routine that runs inside this page. Disconnect from the internet after the page loads and the converter still works.
Why only WAV output? What about MP3, OGG, FLAC?
Browsers can decode every common audio format but cannot natively encode anything other than uncompressed WAV. Reliable client-side MP3 or OGG encoding would require bundling a multi-hundred-kilobyte encoder library on every page load. We deliberately keep this tool small, fast and dependency-free. WAV is also the format most editing and archival workflows want.
Why is the WAV bigger than my MP3?
MP3 is lossy and heavily compressed. WAV is uncompressed, so it is several times larger but contains every sample your browser was able to decode. If size matters more than fidelity, keep the original MP3.
Which sample rate should I pick?
Leave "Keep original" unless you have a reason. 44.1 kHz is CD audio, 48 kHz is the pro / video standard, 16 kHz is plenty for clean speech, and 8 kHz is the telephone standard. Down-sampling reduces file size proportionally.
Why is WMA not supported?
No major browser can decode Microsoft's WMA format. Convert WMA to MP3 elsewhere first, then bring it back here for further processing.