WebM is what Chrome, Firefox and most browser-based recorders save: screen recordings, Loom-style captures, recorded calls. Many players and editors don't open it. This keeps the audio and saves it as an MP3, converted on your own device.
Your file never leaves your device. Nothing is uploaded.
Drop an audio or video file here
Drop a .webm (video or audio) up to 500MB. Nothing is uploaded.
Conversion runs on FFmpeg, compiled to WebAssembly, inside this browser tab. Licences and source
WebM audio is usually Opus at 64 to 160 kbps. A 192 kbps MP3 keeps all of it; 128 kbps is plenty for recorded calls and screen recordings with voice.
Nowhere. The converter runs inside your browser tab, so the file is read and converted on your own device and saved straight back to it. It is never uploaded to Wave or anyone else, and we never see its name or contents.
Recordings stopped abruptly (a crashed tab, a closed laptop) sometimes have a damaged header. The converter will say it can't read the file; re-exporting it from the original app usually fixes it.
A WebM screen recording carries video you don't need for a transcript. As an MP3 it's a fraction of the size, so it uploads to the free Wave AI transcription tool in seconds.
Related: Free Audio Converter That Never Uploads Your File · Free audio transcription · Free YouTube Transcript Generator · Convert MP4 to MP3 Without Uploading the Video · Video to MP3: Extract the Audio From Any Video · Convert M4A to MP3 in Your Browser · Convert WAV to MP3 and Make It 10x Smaller · Convert MP3 to WAV for Editing and Playback · Convert OGG and Opus Voice Notes to MP3 · Convert MOV to MP3: Audio From iPhone Videos
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