AI Text to Speech
Convert text to natural speech with AI in your browser. Powered by SpeechT5 โ 100% private, no upload to server. Multiple voices, adjustable speed, download WAV. Free online text to speech converter.
Frequently Asked Questions
Is this tool really free?
Yes! Completely free with no sign-up required. No credits, no watermarks, no limits. The AI model runs entirely in your browser via WebAssembly, so there are no server costs.
Why is the first generation so slow?
The first time you use this tool, your browser downloads the SpeechT5 model (~150MB). This only happens once — the model is cached by your browser, so subsequent generations load the model instantly. For comparison, downloading 150MB takes about the same time as installing a small desktop app, and far less than setting up your own Python TTS server.
Is my text uploaded to a server?
No! Your text is processed entirely in your browser using WebAssembly. It never gets uploaded to any server. This ensures complete privacy — you can even use this tool offline after the model is cached.
What languages are supported?
This tool is optimized for English. The underlying SpeechT5 model was trained primarily on English speech data, so non-English text may produce garbled or unnatural results. For other languages, consider a native speaker model.
How do the different voices work?
SpeechT5 is a "zero-shot multi-speaker" model. Each voice is defined by a speaker embedding — a 512-dimensional vector that captures voice characteristics. We provide a curated set of voices sourced from the CMU ARCTIC speech dataset. Switching voices loads only ~2KB of additional data per voice.
What audio format can I download?
You can download the generated speech as a WAV file (16kHz, 16-bit, mono). WAV is a lossless format supported by all audio and video editors. If you need MP3, you can convert the downloaded WAV with any audio converter tool.
Is there a text length limit?
SpeechT5 can synthesize up to ~30 seconds of audio per run (roughly 600 characters of English). For longer text, split it into multiple runs and download each audio file separately. We may add automatic chunking in a future version.
Can I use it on my phone?
Yes! This tool works on modern mobile browsers. However, model loading and synthesis may be slower on mobile devices due to limited computational resources. For best results, use a desktop browser with Chrome, Firefox, or Edge.