webm → text · browser recordings
WebM to text.
Recorded something in a browser app? It's probably a .webm. Drop it in and get the transcript.
// short answer
To convert WebM to text, drop the .webm file into the box above. Audio-only and video WebM both work: the sound is transcribed, and you can download .txt or .srt. Some WebM files don't store their length, which changes when limits are checked. Free: 3 files a day with no account, transcripts on screen for recordings up to 15 minutes, and emailed for 15–30 minutes (15 MB upload cap). Unlimited ($9/month) takes files up to 2 hours and 50 MB, 30 hours of audio a month, no daily limit, with speaker labels.
Updated 2026-09-17
Why WebM files are everywhere
WebM is what Chrome and Firefox produce when a web page records your microphone, camera or screen. Browser-based voice recorders, screen recorders and online meeting tools that save in the browser often hand you a .webm.
The missing-duration quirk
Files recorded live in a browser are often written without a total duration in the header. The page checks a file's length before uploading so it can tell you up front if it's too long. With no duration it can't, so a WebM over the free limit is turned away after the upload instead of before.
Converting to MP3 fixes the header and shrinks the file:
ffmpeg -i recording.webm -vn -ac 1 -b:a 48k output.mp3Tips for browser recordings
- Use a headset if you can. Laptop microphones pick up keyboard noise and room echo, the two things that hurt accuracy most.
- Check the recording has sound. Screen recorders in the browser only capture tab or system audio if you tick the share-audio option.
Free vs Unlimited
| Free | Unlimited | |
|---|---|---|
| Price | $0 | $9/month, cancel anytime |
| Files per day | 3 | No daily limit |
| Longest file | 15 min on screen, 30 min by email | 2 hours |
| Upload size | 15 MB | 50 MB |
| Audio per month | — | 30 hours |
| Speaker labels | No | Yes |
| Account | None | None, Stripe checkout |
FAQ
Does WebM video work, or only audio?+
Both. For video, only the audio track is transcribed.
Why did my WebM fail after uploading?+
Most likely it was longer than the free limit and the file didn't record its duration, so it could only be checked on the server. Free files can be up to 30 minutes. Unlimited takes 2 hours.
Can I get subtitles from a WebM?+
Yes. Click Download .srt after the transcript appears.