Free, Expressive Text-to-Speech
Powered by Microsoft's VibeVoice
The next generation of open-source AI voice is here. Our free online TTS tool creates high-quality, natural-sounding, and conversational audio.
Try VibeVoice for Free NowChoose Your Engine
From fast results to unparalleled quality, select the model that fits your needs.
VibeVoice 1.5B
The perfect balance of speed and high-quality audio. An efficient engine ideal for daily text-to-speech tasks and rapid content creation.
Access 1.5B for FreeVibeVoice 7B
For state-of-the-art, pro-grade results. Experience unparalleled realism and emotional depth for the most natural-sounding AI voice.
Access 7B for FreeA Powerful AI Voice Generator, Completely Free
This Text to Voice tool is designed for creators who demand quality and flexibility.
Expressive & Natural Voice
Produce high-quality audio with realistic intonation and emotion. Perfect for any project requiring an authentic AI voice.
Multi-Speaker & Long-Form Audio
Effortlessly create conversational audio with multiple speakers from a single prompt. Ideal for podcasts and long-form audio narration.
Open-Source & Free Online TTS
Built on Microsoft's open-source model, we provide this powerful TTS tool online, completely free of charge.
Powered by Microsoft's VibeVoice Model
Understand the groundbreaking open-source technology that makes this AI Voice Generator possible.
Technical Deep Dive
Advanced Architecture
VibeVoice utilizes a VALL-E style architecture, treating TTS as a language modeling task. It generates discrete audio codec tokens instead of traditional spectrograms, allowing it to produce exceptionally natural-sounding speech.
Zero-Shot Capabilities
The model's key innovation is its "in-context learning." This enables the synthesis of personalized voices from short audio prompts, maintaining speaker identity and prosody to create a truly expressive voice.
VibeVoice Model Feature Showcase
Hear the Difference
Listen to high-quality audio generated by the VibeVoice TTS model.
Spontaneous Emotion
Generates a truly expressive voice that captures spontaneous, unscripted emotional nuances.
Podcast with Background Music
Demonstrates robustness by generating clean speech from prompts containing background noise, perfect for podcasts.
Cross-Lingual Synthesis
Maintains a speaker's vocal identity while seamlessly switching from Mandarin to English (code-switching).
FAQs
The primary technical difference is the model's scale, which creates a clear trade-off between computational efficiency and audio fidelity.
VibeVoice 1.5B (High-Efficiency):
- This 1.5 billion parameter model is optimized for speed.
- It achieves an excellent Mean Opinion Score (MOS) of 4.3 ± 0.1 and a very low Real-Time Factor (RTF) of ~0.2, making it ideal for most applications where a fast response is crucial.
VibeVoice 7B (High-Fidelity):
- This 7.0 billion parameter model is designed for maximum quality.
- It achieves a state-of-the-art MOS of 4.5 ± 0.1, excelling at capturing subtle emotional nuances and prosody. This higher fidelity requires more computational resources, reflected in a higher RTF of ~0.8.
Summary:
| Metric | VibeVoice 1.5B | VibeVoice 7B |
|---|---|---|
| MOS (Quality) | 4.3 ± 0.1 | 4.5 ± 0.1 |
| RTF (Speed) | ~0.2 (Faster) | ~0.8 (Slower) |
| Best For | Daily Use & Speed | Pro-Grade Quality |
Yes, absolutely. Our mission is to make high-quality Text-to-Speech accessible to everyone. This is a Free TTS service, made possible by leveraging the open-source Microsoft VibeVoice model and efficient cloud infrastructure.
Unlike many robotic-sounding TTS tools, VibeVoice excels at creating expressive voice outputs. It understands context to produce natural-sounding intonation, making it perfect for conversational audio, podcasts, and video narration where emotion is key.
Yes. The underlying Microsoft VibeVoice model is released under the permissive MIT license. This means any audio you generate with our AI Voice Generator is yours to use for both personal and commercial projects without royalties.
This Online Text-to-Speech service is ideal for a wide range of applications, including YouTube videos, podcasts, e-learning courses, audiobooks, and any other project that requires high-quality audio from text. Its ability to handle long-form audio makes it especially powerful for extensive projects.