AivisSpeech
AI & Generative AI
Free speech synthesis software that produces emotionally expressive voices, usable for video narration, voice dramas and similar.
Free planAIJapanese UI
List of speech synthesis apps
5 apps
5 apps that APP NAVI confirmed from official sources as speech synthesis. Last checked: 2026-11-05. Anything we could not confirm stays "Unverified"; we never guess. Prices and specs change, so check each app's official page before you use it.
COEIROINK
AI & Generative AI
A free speech synthesis app that reads text aloud in character voices. It is distributed for Windows, Mac and Linux, and lets users create their own voice with the MYCOEIROINK feature.
Japanese UI
SHAREVOX
AI & Generative AI
A free text-to-speech app that uses deep-learning speech synthesis. The official site says users can adjust intonation and speed in detail and create a voice from their own recording.
Free planAIJapanese UI
Style-Bert-VITS2
AI & Generative AI
Text-to-speech software based on Bert-VITS2 that generates emotional speech, with controllable emotion and speaking styles.
AIJapanese UI
VOICEVOX
Video, Audio & Music
Free text-to-speech and singing voice synthesis software; the page states it is free for commercial and non-commercial use subject to each character's terms.
Free planJapanese UI