Free Thai Speech-to-Text

Thai is spoken by roughly 60 to 70 million people and is the national language of Thailand. It is written in its own Thai script, an alphabet with no capital or lower-case distinction, and it is a tonal language in which the pitch of a syllable changes the meaning of a word. Thai recordings span news, business, tourism, academia and creators alike.

ConvertSpeech transcribes them automatically. Upload your audio or video and our speech-recognition engine writes out the spoken Thai in the Thai script, 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.

Thai is a tonal language with five tones — mid, low, falling, high and rising — and the tone can be the only thing that separates two otherwise identical syllables, so the same string of sounds can mean completely different things. The engine is tuned to pick up these tonal distinctions from clear audio and render the intended word in the Thai script.

Thai also writes running text without spaces between words: sentences are continuous strings of characters, and there are no obvious boundaries marking where one word ends and the next begins. Deciding where those word boundaries fall is a genuine challenge that the transcription engine has to solve, and ConvertSpeech segments the stream into readable Thai text. As always, the largest factor in accuracy is recording quality — a clear signal with little background noise beats everything else.