TTS (Text-to-Speech)
Definition
AI technology that converts written text into natural-sounding spoken audio.
Why It Matters
Understanding TTS (Text-to-Speech) is essential for anyone working with AI. This concept underpins how modern AI systems function, and knowing it helps you make better use of AI tools like those available on Free.ai.
See TTS (Text-to-Speech) in Action
Try our free AI tools that use this technology.
Try Free AI ToolsQuick Facts
| Term | TTS (Text-to-Speech) |
Browse Glossary
View All AI TermsFAQ
The Free AI Voice Generator turns any text into a natural-sounding AI voice using open-source voice models like Kokoro and Chatterbox. 174 voices, 37 languages, no sign up required.
Yes. You get 2,500 free tokens per day as a guest or 5,000 with a free account. Generating an AI voice from a single sentence costs about 100 tokens, so you can create dozens of clips per day for free.
174 AI voices spanning male, female, and neutral styles across many languages and accents. Preview any voice before generating to find the perfect match.
Yes. Upload a short audio sample and the AI will generate new speech that matches it. Use the voice cloning tool at /voice/clone/.
Generated AI voice files are delivered as WAV by default. You can convert to MP3 or other formats with any audio tool.
No. Paste text, pick a voice, and generate — no sign up required. Creating a free account doubles your daily token allowance and unlocks longer inputs.
Very natural. Models like Kokoro and Chatterbox produce human-like speech with proper intonation, rhythm, and emotion. Use the preview button to hear each voice before generating.
Yes. AI voice audio you generate is yours to use in YouTube videos, podcasts, presentations, apps, and other commercial work. All underlying voice models are open-source with permissive licenses.
37 languages including English, Spanish, French, German, Japanese, Chinese, Hindi, Arabic, and many more — with native-sounding pronunciation for each.
Up to 5,000 characters per generation (500 for anonymous users). Each generation costs tokens based on length (~100 tokens per sentence). For books or long content, use the Audiobook Generator.
Yes. Every AI voice supports speed, pitch, and emotion controls (happy, sad, angry, whisper, excited). Preview before downloading.
Yes. Access the AI voice generator programmatically — the API is compatible with the OpenAI TTS API format. See /api/ for details.