Free Vietnamese Speech-to-Text

Vietnamese is spoken by roughly 85 to 100 million people and is the official language of Vietnam. It is written in chữ Quốc ngữ, a Latin-based alphabet with diacritics, so its transcripts are readable to anyone familiar with the Latin script — and demand spans news, education, business and a large overseas community.

ConvertSpeech transcribes it automatically. Upload your audio or video and our speech-recognition engine writes out the spoken Vietnamese with its tone and vowel marks in place, 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.

Vietnamese is a tonal language: standard (northern) Vietnamese has six tones, and the tone can change the meaning of an otherwise identical syllable. Those tones are written with diacritics in chữ Quốc ngữ, so clean audio matters more than usual — a clear recording lets the engine hear the tone and place the right marks. ConvertSpeech produces natural Vietnamese text with its full diacritics rather than stripped, unaccented letters.

Pronunciation also varies by region, most noticeably between the northern (Hanoi) and southern (Saigon) dialects, which differ in how some tones and consonants are spoken. The engine handles standard Vietnamese and both broad varieties, but as always the largest factor in accuracy is recording quality — a clear signal with little background noise beats everything else.