Uncompressed recordings down to a tenth of the size, playable everywhere — converted on your own device.
MP3, WAV, M4A, FLAC, OGG… — or drop a video (MP4, MOV, WebM) to extract its audio · nothing is uploaded
No size limit · files are processed on your device and never uploaded · how it works
MP3 conversions run instantly in your browser — nothing to download. Other formats use the FFmpeg engine (31 MB, once).
Plays everywhere — the safe choice.
192 kbps is transparent for most music; 128 suits voice; 320 is the maximum.
Runs in your browser. Files are never uploaded — you can go offline after the page loads.
Drop files, pick options, download. Whole folders at once, no signup, no daily limit.
The same engines the professionals use — SVGO, resvg, MozJPEG, libwebp, libavif — compiled to run in your browser.
Files are processed on your device and never uploaded. Close the tab and nothing remains anywhere.
This page opens the Audio Converter pre-set to MP3. WAVs from recorders, DAWs and sample packs convert in seconds; whole folders download as one ZIP.
Everything runs on your device — FFmpeg compiled to WebAssembly — so raw session audio and voice recordings are never uploaded anywhere.
This is a pre-set view of the Audio Converter. Every option in the toolbar can still be changed.
192 kbps is transparent for most music; 128 kbps is fine for voice; 320 kbps if storage is no concern. A 50 MB WAV becomes roughly 7 MB at 192 kbps.
MP3 is lossy, so technically yes — but at 192 kbps and above the difference from the WAV is inaudible for most content and listeners. Keep the WAV as your editing master.
Most online converters upload your file to a server. InfyTool ships the actual encoders to your browser as WebAssembly instead, so processing happens inside your tab — faster for batches, and nothing to delete afterwards.
InfyTool is built by the same team as these free libraries.