Convert WebM to Text
Upload your webm file and get an accurate transcript in seconds. 100+ languages, speaker detection, timestamps included.
About WebM
WebM is an open web media format designed for HTML5 video. Common for web recordings and browser-based audio capture.
Export Transcripts As
.TXT
Plain Text
.SRT
Subtitles
.VTT
WebVTT
.DOCX
Word Doc
.JSON
Structured
.PDF
Document
Frequently Asked Questions
Upload your WebM video file (WEBM) to STT.ai or paste a URL — we extract the audio track automatically and run it through your chosen AI model. No manual demux step required. Output formats include TXT, SRT, VTT, DOCX, JSON, and PDF.
Yes. STT.ai includes 600 free minutes/month — enough for around 10 hours of video content. WebM files tend to be larger; upload limits scale with your plan. Paid plans start at $5/month.
Accuracy on WebM video transcription depends on the audio track inside the container — higher bitrate audio (256 kbps+) gives better results than heavily compressed soundtracks. Our best models reach 93-95% accuracy on clean dialogue.
For most WebM files, STT.ai Enhanced or Whisper Large V3 give the best accuracy. NVIDIA Canary is faster with comparable quality on shorter clips. You can compare results from multiple models on the same file in the compare-stt tool.
Yes. WebM video transcription supports 100+ languages and auto-detects the spoken language. For multi-language dialogue, enable language detection per segment.
Yes. Speaker diarization works on every supported format including WebM. Each speaker is labeled (Speaker 1, Speaker 2, ...) and you can rename them in the editor afterwards.
WebM video files up to 2 GB are supported on every plan. Free users get up to 1 hour of video per file; paid plans extend that to 8+ hours per file. For huge raw camera files, compress to H.264/AAC or use a URL upload.
Yes. WebM files are processed and deleted by default. Pro plans add client-side encryption — even if our database is breached, your transcripts are unreadable without your key. Data is never used for model training without explicit opt-in.
Yes. The REST API accepts WebM files directly via the /v1/transcribe endpoint. Python and Node.js SDKs include WebM examples. Free tier includes 100 minutes/month of API usage.
Yes — after transcription you can export SRT or VTT subtitles, and our burn-subtitles tool overlays them onto your WebM video as hardsubs. Soft-subtitle muxing is also supported for WebM formats that have native subtitle tracks (MKV, MP4 with mov_text).
Yes. Every transcript opens in our built-in editor where you can correct words, rename speakers, adjust timestamps, and add notes. Edits persist across exports.
Export the transcript as SRT or VTT, then use our burn-subtitles tool to render hardsubs directly onto the WebM video — no FFmpeg knowledge required. For softsubs, MKV and MP4 support attaching subtitle tracks without re-encoding.
STT.ai supports URL uploads from 1,300+ platforms (YouTube, Vimeo, SoundCloud, podcast hosts, etc.). If the source returns WebM or anything convertible to WebM, we can transcribe it. DRM-protected sources cannot be transcribed; for those, download manually and upload the WebM file directly.