FormatDogWorkspace
Convert an audio file between MP3, WAV, OGG, M4A, and FLAC — runs on a real local audio engine, entirely inside your browser.
No signup · No file limits · Files never leave your deviceSelect the file you want to convert.
MP3, WAV, OGG, M4A (AAC), or FLAC.
Get your converted file, encoded locally.
MP3 for the smallest, most universally compatible file. WAV for uncompressed, edit-ready audio. OGG for an open, patent-free format. M4A (AAC) for Apple devices and software. FLAC for lossless compression when file size matters less than exact fidelity.
No. Conversion happens entirely inside your browser, on your own device.
A real, self-hosted build of FFmpeg compiled to WebAssembly — about a 30MB one-time download the first time you use any video/audio tool on this site, then cached by your browser for every tool afterward.
Yes, a little — converting MP3 to another lossy format like OGG re-encodes the already-compressed audio, which is an inherent limitation of any lossy-to-lossy conversion, not specific to this tool. Converting to or from WAV or FLAC (lossless) avoids that extra loss.
Yes, completely free, with no daily limit.
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Pinch or use +/− to zoom, two fingers to pan. One finger to drag and redact.
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Drag the corner handles to resize the crop area, or drag the middle to move it.
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Detecting grid lines…
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Click any line of text to retype it. Pinch or use +/− to zoom.
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Highlight/Underline: drag a box over the text. Draw: drag to sketch. Note: tap once to place a comment.