Files stay on your deviceYour recording.
Ready to listen.
Turn a compatible browser or screen recording into an MP3. Keep the conversation without keeping the screen.
Your media stays on your device.
Private by default192 kbps by defaultTested with VP9 + Opus
Your WebM recording stays on this device throughout conversion. The browser creates the MP3 locally, with no media upload to a conversion server.
A SIMPLE WORKFLOW
Choose. Convert. Keep.
Stop the recording and save its finished .webm file. Play it once to check the sound, then choose the file here or drag it onto the converter on desktop.
Keep 192 kbps for a starting point, or choose 128, 256 or 320 kbps. Auto sample rate and channels keep the source settings where supported. Trim audio can save one segment when the browser can read the recording’s length; recordings with unknown duration can still be converted in full.
Click Convert to MP3, keeping this tab open. Listen to the result, then click Download MP3. The saved audio appears in your browser’s downloads list.
BUILT AROUND YOUR AUDIO
Convert a compatible WebM recording or web export to MP3 on this device. Free, with no account.
In your recording app, enable the microphone or shared tab audio you need. These are separate sources, and available audio capture depends on the browser and what you share. Make a short test and listen before recording a full session.
Follow the WebM browser recording guideA video-only recording returns a no-audio-track error. A recording with an audio track that contains silence may convert successfully but still sound silent. Check the saved source; MP3 conversion cannot recreate missing speech or tab audio.
Troubleshoot a missing audio trackMP3 helps when your player or editing app does not accept WebM audio. If it supports Ogg Opus, use Extract Audio with Original audio selected to copy compatible Opus into a .opus file without encoding it again.
Extract the original Opus audioKNOW YOUR FORMAT
LESS VIDEO. MORE POSSIBILITY.
Bring the sound from your WebM recordings into an MP3 listening workflow.
THE RESULT
Turn a locally saved presentation recording into audio you can review while preparing your next delivery.
Save your WebM recording to this device, choose it here and convert at 192 kbps. Preview and download the MP3.
VP9 with Opus is the verified WebM combination.
Tested input: VP9 video + Opus audio
THE RESULT
Create an audio-only copy of your own recorded walkthrough when the listener only needs your spoken explanation.
Select the WebM, choose 128 kbps and set Channels to Mono. Convert and download, then share through your preferred app.
Opus to MP3 re-encodes the audio and adds a lossy encoding step.
Tested input: VP9 video + Opus audio
THE RESULT
Keep a concise explanation from a longer browser recording as a standalone audio note.
Choose the file and enable Trim audio in Advanced settings. Enter the range you need, convert and download the excerpt.
Trimming is available when the recording’s duration can be read.
Tested input: VP9 video + Opus audio
Choose a video. Convert. Download your audio.
Illustrative workflows. Use a local file you own or have permission to process.
UNDER THE EXTENSION
A .webm file describes the container, not a single audio format. WebM can contain Opus or Vorbis audio; changing its filename to .mp3 does not convert either codec.
Compare WebM, MOV and MP4The verified combination on this page is VP9 video with Opus audio. A browser recording can use a different codec combination. Vorbis is not available in Original audio mode, and untested WebM variants are not covered by the Opus result.
MAKE AN INFORMED CHOICE
192 kbps is the default balance between output size and MP3 quality; 128, 256 and 320 kbps are also available.
Transcoding Opus to MP3 is lossy. Increasing the MP3 bitrate cannot restore detail already removed from the WebM audio.
Auto sample rate and channels normally preserve the source layout without an extra forced conversion.
Compare MP3 bitrates and file sizesNo. The WebM bytes stay in your browser during conversion and are not sent to our servers.
The verified sample contains VP9 video and Opus audio. WebM files with other codecs may not decode in the current local engine.
Yes, if the saved recording is a compatible WebM with audio, such as VP9 and Opus. Finish saving the recording before choosing it. If your recorder exports MP4 or MOV instead, use the matching tool rather than renaming the file.
Screen sharing does not always include sound. The recorder may capture video without microphone or tab audio, depending on your settings and browser. Check the saved recording before converting. If it has no audio track, record again with the needed source enabled; a higher MP3 bitrate will not recover it.
First check the player volume and play the source WebM. A silent audio track can be encoded into a valid but silent MP3. If the source has audible sound and the MP3 does not, check whether it has multiple audio tracks: this tool uses the first one and does not offer track selection.
Yes, for a compatible Opus track. Open Extract Audio from Video, choose Original audio and select the WebM. The result is an Ogg Opus file with a .opus extension. It keeps the encoded audio without converting it to MP3; your player must support that output.
Opus and MP3 are different lossy codecs. Converting between them changes the encoding and cannot improve the original source.