FormatDogWorkspace
Pull just the sound out of a video file as a standalone MP3, WAV, or M4A — a lecture recording, a podcast filmed on camera, a voice memo shot as video. Runs on a real local video engine, entirely in your browser.
No signup · No file limits · Files never leave your deviceSelect any video file with an audio track.
MP3, WAV, or M4A (AAC).
Get just the sound, with the video discarded.
The first time you use this tool (or any FormatDog video/audio tool), your browser downloads a real, self-hosted build of FFmpeg compiled to WebAssembly — about 30MB, one time, then cached by your browser. Every video and audio operation on this site runs on that same local engine, entirely on your device.
No. The video never leaves your device — the extraction runs inside your browser tab, in local memory.
MP3 is the smallest and most universally compatible choice for speech or music. WAV is uncompressed and best if you plan to edit the audio further. M4A (AAC) is a good middle ground and plays natively on iPhones and most Apple software.
That's the one-time ~30MB engine download, not the extraction itself — the actual audio extraction is usually fast. Every video/audio tool you use afterward on this site reuses the same cached engine.
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.