WebM to MP3 Converter – Free, Fast & Private
Convert WebM video and audio to MP3 locally in your browser — your recording never leaves your device
How to convert WebM to MP3
Choose or drag in your WebM file — nothing is uploaded, it stays on your device.
Conversion starts instantly — the audio is extracted and encoded to MP3 right in your browser, with live progress.
Download your MP3 file.
Everything happens right here in your browser: your file is converted locally on your device with WebAssembly FFmpeg and is never uploaded to any server. Because there is no upload, there is no practical length limit either — multi-hour recordings and files up to 8GB convert just fine, and even a huge file starts instantly. Read more: how in-browser conversion works →
About WebM to MP3 conversion
WebM is the format the web itself produces: browser screen recordings, in-page voice recorders, web-app meeting captures and video saved from web players. It is efficient and open — and almost nothing outside a browser will open it, which is a problem the moment you want the audio in a podcast app, an editor or a transcription tool.
This converter decodes WebM's Vorbis or Opus audio and writes a plain 192–320kbps MP3, entirely inside your browser. Since browser recordings are often meetings and voice notes, it matters that the file is never uploaded anywhere.
Frequently asked questions
Drop the .webm file into the box above. The audio — Opus or Vorbis, depending on what your browser recorded — is decoded and encoded to MP3 on your device, and you download it when the progress bar finishes.
Yes. Many web recorders produce WebM with no video track at all; those convert exactly the same way, just faster, because there is nothing to skip past.
WebM was designed for browser playback and its Opus/Vorbis audio codecs are not what most desktop audio software expects. MP3 is the universal fallback that every editor, player and upload form accepts.
No. The conversion runs entirely in your browser using WebAssembly (FFmpeg). Your recording never leaves your device — that is also why there is no upload wait, no queue and no file-size pricing. For personal recordings, lectures and meetings this matters more than anywhere else.
Up to 8GB on desktop browsers and 2GB on mobile — big enough to pull the audio out of a multi-hour lecture or meeting recording. There is no limit on the number of files, no signup and no watermark.
192–320kbps, which is transparent for speech and very close to transparent for music. The audio stream is decoded once and encoded once — there is no extra generation loss from server-side re-processing.
Yes — completely free and unlimited, with no watermark, signup or daily quota. Because the conversion runs on your own device instead of our servers, there are no processing costs to charge for.
Yes. It runs in any modern browser — Chrome, Safari, Edge or Firefox — on Windows, macOS, ChromeOS, Linux, iOS and Android. There is nothing to install.
Audio-only work is fast: there is no video to re-encode, so even the soundtrack of a long video converts in well under real time. Files whose audio is already MP3 are rewrapped without re-encoding and finish in seconds.
Yes. Our sister site Red Panda Transcribe (redpandatranscribe.com) turns the MP3, M4A or WAV you export here into text right in your browser — like this tool, nothing is uploaded, and there is no time limit and no signup. It exports TXT, SRT and VTT.