WebM to text
A .webm file is a video file that carries the audio, and Transcrib Si takes it as it is: 120 minutes per file. Most of the time nobody wanted the video, only the talking that came with it. Screen recorders and meeting recorders write WebM by default, so the speech lands buried inside the file.
Good news: the transcription only listens to the sound, so the picture is ignored completely. .webm is on the accepted list, one file runs up to 64 MB and 120 minutes, and you get the text back with timestamps and speaker labels.
What is inside, and why the file is big
WebM is Google's container for VP8 and VP9 video with Opus audio, and it became the default output format for browsers, screen recorders and conference software because it is open and efficient. The video part is usually the reason a .webm file is heavy: a screen recording of an hour is a lot of frames.
None of that matters for transcription, but the size limit does, and this is where .webm users hit a wall. Video bytes eat into the 64 MB allowance quickly, so a long recording often breaks the limit while the speech itself would have fitted easily. The workaround is simple: extract or record the audio track alone and send that, or cut the recording into shorter parts. The guide to long recordings has the details.
| Part | What it is | What the transcription does with it |
|---|---|---|
| Video | VP8 or VP9 frames | Ignored — the picture is not part of the job |
| Audio | Usually Opus | Read, split into lines and labelled by speaker |
| Size | Counts against the 64 MB limit | Send the audio alone when the recording is long |
| Length | Counts against the 120-minute limit | Split the file into parts past two hours |
From a screen recording to a paragraph
The uploader below reads the sound track and ignores the rest.
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Save the recording
Whatever produced the .webm — a meeting recorder, a browser, a screen capture tool — will happily hand the file over. Keep it where you can reach it from a browser.
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Send it as it is, or send only the sound
If the file is comfortably under 64 MB, send it whole. If it is heavy because of the picture, save the audio track next to it and send that instead — the transcript is identical and the upload is much faster.
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Fix the names, export the result
Speaker splitting marks who said what. The text can be corrected in the editor and then downloaded as TXT, Markdown, SRT, VTT, CSV or DOCX.
Drop an audio or video file
or — mp3, wav, m4a, mp4, up to 64 MB and two hours
Transcription runs under your account: sign in or create a free account.
The free plan asks for no card. Create a free account or sign in.
The price of one .webm file
Paying by the length of the recording, not by the container and not by the picture. The video track is never charged for — only the minutes of sound you send.
| Plan | Price | What you can send | What you get back |
|---|---|---|---|
| Free | $0 | 3 files a day, up to 30 minutes and 64 MB each | Text with timestamps, speaker labels, TXT, Markdown, SRT, VTT, CSV |
| Pro, billed yearly | $10 per month, $120 for the year | 1,500 minutes of audio per calendar month, files up to 64 MB and two hours | Every export format, DOCX included, plus API keys and full history |
| Pro, billed monthly | $20 per month | The same allowance, cancel any time | The same features |
Questions this page answers.
Do I have to remove the video track first?
Only if the file is too heavy for the 64 MB limit. The service ignores the picture completely, so sending a whole .webm works fine as long as the size fits; a video with the sound track pulled out is simply smaller and faster to upload.
Does the transcription follow the picture?
No. What comes out is a transcript: the words that were spoken, in order, with a timestamp on every line and a speaker label when you ask for one. It is not a description of the screen and it does not note what happened visually.
My .webm recording is longer than two hours. What now?
Cut it into parts and upload them one after another, or save only the sound track and send that. Two hours and 64 MB are hard limits on every plan, paid ones included, and they exist because the gateway cannot take more.
Can I get subtitles for the video as well?
Yes — export SRT or VTT and place it next to the .webm file. The subtitle timings come from the same timestamps as the transcript, so the captions and the text agree with each other.
Which formats do you accept besides .webm?
mp3, wav, m4a, mp4, webm, ogg, flac, aac, wma and mov. The general guide walks through what each one is good for, and the MP4 page covers the other common video container.
Where the numbers on this page come from
Each line names the page the figure was read on and the day it was read.
- Free $0, 3 files a day, 30 minutes per file, 64 MB — https://transcrib.si/pricing.html — checked 2026-10-25
- Pro $10 per month ($120 for the year), $20 per month, 1,500 minutes per calendar month, 120 minutes per file — https://transcrib.si/pricing.html — checked 2026-10-25
- Accepted containers: mp3, wav, m4a, mp4, webm, ogg, flac, aac, wma, mov — https://transcrib.si/app.html (the file input of the upload form) — checked 2026-10-25
- Exports in TXT, Markdown, SRT, VTT, CSV and DOCX — https://transcrib.si/pricing.html — checked 2026-10-25
Where to go next
MP4 to text
The other video container, and the same job in a different wrapper.
Transcribe a meeting to text
What to do with the recording a meeting leaves behind.
Transcribe a long recording
Cutting a file that is bigger than the limit allows.
Transcribe audio to text
The general guide to every container and every export.
Plans and prices
Every plan, every limit, side by side.
Security
What happens to a file while it is being transcribed.
More to read: the privacy policy, the terms of service, about the author, the contact page and the app.
Mark Burmistrov, Founder.
Every number on this page comes from the pricing page, the service contract or the upload form itself. The author of the page and the publisher of the site are the same person. Questions and corrections: support@transcrib.si.