SonaFactEvidence from audio
SonaFactEvidence from audio

Transcribe Czech audio to text

Upload a recording in Czech and get a transcript with speakers told apart and a timestamp on every word. Check it in the editor while the audio plays, then export it.

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The recording language is already set to Czech — you can change it before you start. The file stays in your browser until you create a free account.

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45 min ≈ 4 min

Three transcripts a day on the free plan, up to 30 minutes each.

What you get

  • Word-level timestamps, so subtitle splitting lands exactly on the word.
  • Speakers separated automatically, with names you can set once for the whole transcript.
  • SRT and VTT subtitles in the language of the recording, on every plan.
  • AI summaries and other documents can be written in Czech or in any other of the hundred languages, whatever the language of the recording.

A real result from SonaFact

On 2 October 2026 we ran the first 75 s of a public recording in Czech through SonaFact. This is the beginning of the result exactly as it came out, with nothing corrected. The recording is one person reading a Wikipedia article, so the transcript has one speaker.

0:00 · Speaker 1

Boleslav Chrabrý, z Wikipedie, otevřené encyklopedie. …

0:09 · Speaker 1

Boleslav I. Chrabrý, polsky Boleslav I. Chrobry, narozen 1966 nebo 1967, zemřel 17. června 1025, byl polským knížetem v letech 1992 až 1025 a později se stal prvním polským králem. Obsah Původ …

0:35 · Speaker 1

Přátelství s Otou III. …

Words: 101 · length: 75 s · marked uncertain by the engine: 0%. Uncertain words are underlined — in the editor you check them by playing the moment they were said.

Recording: Boleslav Chrabry — Ludek, Public domain, Wikimedia Commons.

Three steps from recording to finished work

  1. Upload anything recorded. Audio or video — up to 30 minutes per file on Free, 3 hours on Starter, 6 on Pro and 10 on Studio. The language and the number of speakers are detected for you, or you set them yourself when you already know. You can also record straight in the browser.
  2. Review in the editor. Play it back with the line highlighted, fix a word, rename a speaker everywhere, move a line to the right person.
  3. Turn it into finished work. Export DOCX or PDF, generate minutes, action items, subtitles, chapters or a call report.

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SonaFact recognises a hundred languages and detects the language of a recording automatically.