WEBA to MP3 Converter
A .weba file is audio-only WebM, the format Chrome and Edge produce when a web page records your microphone. It plays in the browser and almost nowhere else, so converting it to MP3 is how a browser recording becomes a normal audio file.
Audio Converter
or drop MP3, WAV, M4A … files here ·
Max 95 MB per file· Up to 20 files· Deleted after 30 minutes
Files are processed on our servers and deleted after 30 minutes.
Constant bitrate (CBR) gives a predictable size and works on every player. Variable bitrate (VBR) spends bits where the music needs them and is usually smaller at the same quality.
Keep the source rate unless a device asks for one. 44.1 kHz is CD standard, 48 kHz is video standard, 8 kHz is used by phone systems and AMR.
Mono halves the size of lossless files and is fine for voice recordings.
16-bit is CD quality. 24-bit keeps headroom for editing and mastering; converting a 16-bit source up does not add detail.
Optional. Seconds (e.g. 75) or minutes:seconds (1:15). Leave empty to start at the beginning.
Optional. Same format as the start time. Leave empty to keep everything up to the end.
How to use this tool
- 1
Add the .weba files
Upload up to 20 recordings, each up to 95 MB. Files saved with a .webm extension that contain only audio work the same way.
- 2
Keep constant bitrate
The page starts at 128 kbps with Bitrate mode on Constant (CBR), so every player can calculate the length exactly. For a single voice, set Channels to Mono.
- 3
Press Convert to MP3
The Opus or Vorbis audio is decoded and written as MP3. Download each file or a ZIP; uploads are deleted after 30 minutes.
What a .weba file is and where it comes from
When a website records audio through your browser, whether it is an online voice recorder, an interview tool, a language-learning exercise or a dictation app, it uses the MediaRecorder API. In Chrome and Edge that API produces WebM with Opus audio, and when the download has no picture, it often lands with the .weba extension.
Inside the browser that file is perfectly fine. Outside it, you hit three problems: many desktop and phone music apps do not open WebM audio, upload forms for podcasts, job applications or coursework often list only MP3, WAV or M4A, and the missing duration makes the file look empty or broken. Converting solves all three. If your browser recording also has video, use WebM to MP3 to pull out just the sound.
How the WEBA to MP3 converter rebuilds the file
Read the WebM container
The tracks are opened even when the header has no duration.
Decode and re-encode
Opus or Vorbis is decoded to PCM, then written as MP3 at your chosen bitrate.
Write a complete MP3
The file has a fixed length, a working seek bar and ID3 tags.
WEBA with Opus or Vorbis: matching the MP3 bitrate
| Codec inside | Standardized | Typical source | MP3 bitrate to pick |
|---|---|---|---|
| Opus | 2012, IETF RFC 6716 | Chrome and Edge page recorders, web calls | 96–128 kbps for speech |
| Opus (music) | 2012, IETF RFC 6716 | Audio saved from streaming web players | 160–192 kbps |
| Vorbis | 2002, Xiph.Org 1.0 release | Older WebM files and some encoders | 160–192 kbps |
Converting browser recordings: dos and don'ts
| Do | Don't |
|---|---|
| Keep Constant (CBR) so older players show the right length | Rename .weba to .mp3 and hope it plays |
| Use Mono for a single microphone | Pick 320 kbps for speech; the file grows with no gain |
| Turn on Normalise volume if the recording is quiet | Delete the original until you have played the MP3 through |
| Trim silence at the start with Start at | Upload recordings you have no permission to share |
WEBA
WebM audio
WEBA is an audio-only WebM file, the web format released by Google in 2010, usually containing Opus or Vorbis audio. Browsers produce WEBA when recording audio and some sites serve audio in it. Quality is good at low bitrates, but most music players, phones and editors do not recognise the .weba extension.
- Compression
- Lossy
- Transparency
- –
- Animation
- –
- Introduced
- 2010 · Google
MP3
MP3 audio
MP3 (MPEG-1 Audio Layer III) is a lossy audio format developed largely at the Fraunhofer Institute and standardised by MPEG in 1993. It removes sounds the ear is unlikely to notice, shrinking music to about a tenth of CD size at 128–320 kbps. All patents have expired, and every phone, car stereo, browser and media player supports it. Quality loss is audible at low bitrates and accumulates with re-encoding.
- Compression
- Lossy
- Transparency
- –
- Animation
- –
- Introduced
- 1993 · Fraunhofer IIS / MPEG
Chrome and Edge save web-page microphone recordings as .weba, which plays in a browser but not in Apple's Music app, most car stereos or upload forms, and often lacks a duration; MP3 turns it into a finished, seekable file.
WEBA to MP3: frequently asked
Why does my .weba recording show 0:00 or no length?
Browsers write a recording as a live stream and usually never go back to fill in the duration field in the WebM header. Players then cannot show a length or let you seek. The converted MP3 is written as a finished file, so the duration and seek bar work everywhere.
What is the difference between .weba and .webm?
Both use the WebM container that Google announced in 2010. The .weba extension simply signals that the file has no video track. Some sites save audio-only recordings as .webm anyway; this page accepts both.
Is there Opus or Vorbis inside my .weba file?
Recordings made in Chrome or Edge with a page's recorder almost always contain Opus. Older WebM files and some encoders use Vorbis. VLC shows the codec under Tools > Codec Information, but you do not need to know it: both decode the same way here. A standalone .opus file goes through Opus to MP3 with the same settings.
Can I just rename .weba to .mp3?
No. Renaming changes only the label, while the audio inside is still Opus or Vorbis in a WebM wrapper. Some players will refuse the file and others will play silence; real conversion decodes and re-encodes the audio.
Which bitrate suits a browser voice recording?
Browser recorders usually capture speech at modest Opus bitrates, so 96 or 128 kbps MP3 already holds everything recorded, and Mono halves the size. Use 192 kbps only when the .weba contains music.
