Free Czech Speech-to-Text

Czech is spoken by around 10 million native speakers and is the official language of the Czech Republic, an EU member state. A West Slavic language closely related to Slovak and Polish, it is written in the Latin alphabet with háček and other diacritics, and Czech recordings span news, business, academia and creators alike.

ConvertSpeech transcribes them automatically. Upload your audio or video and our speech-recognition engine writes out the spoken Czech in the Latin script with the correct diacritics and punctuation, ready to copy into a document, subtitle file or translation tool. It runs in your browser, needs no installation, and your first minutes are free with no account required.

Czech is famous for its dense consonant clusters — whole syllables can be built from consonants alone, as in the tongue-twister "strč prst skrz krk" ("stick a finger through the throat"), where the vowel-like role is carried by a syllabic r. The rolled-fricative sound written "ř" is often called one of the hardest sounds in any language. ConvertSpeech is tuned for standard Czech and turns clean recordings into natural text.

Accuracy also depends on the diacritics that distinguish Czech words: the háček (č, š, ž, ř, ě) and the length marks (á, é, í, ó, ú/ů, ý) change both pronunciation and meaning, so the engine restores them from the audio. As always, the largest factor in accuracy is recording quality — a clear signal with little background noise beats everything else.