Is this English text-to-speech really free?

Yes. The page is public, no signup is required, and there are no credit limits. The voice model runs entirely in your browser. For studio-grade voices and longer narration, see the paid Subformer Voice Synthesis service.

How does the English TTS work in the browser?

It uses Piper, an open-source neural TTS engine, compiled to WebAssembly and run via ONNX Runtime Web. The voice model (~60 MB) is downloaded on first use and cached in your browser's Origin Private File System. Subsequent visits skip the download entirely.

Is my text uploaded to a server?

No. Synthesis runs locally in your browser. The only network calls are to download the Piper voice model and the ONNX runtime — both are static assets. Your text and the generated audio never leave your device.

Does it work offline?

Once the voice model is cached, yes. The first visit needs network access to download the model; after that the page can synthesize speech offline.

What's the difference between this free English TTS and the paid Voice Synthesis service?

The free in-browser TTS uses a medium-quality Piper voice — fine for narration drafts, accessibility, and quick previews, but it sounds noticeably synthetic. The paid Subformer Voice Synthesis service uses studio-grade models (Chatterbox + Gemini TTS), supports voice cloning, and produces broadcast-quality audio. Visit /dashboard/voice-synthesis to try it.

Which browsers are supported?

Any modern browser with WebAssembly: Chrome, Firefox, Safari 15+, Edge, and Chromium-based mobile browsers. The page runs ORT in single-threaded mode so it works in every common browser without requiring cross-origin isolation.

Can I download the audio?

Yes. After synthesis you can play the audio inline or click Download to save it as a 22 kHz mono WAV file. Use any audio editor to convert to MP3 or other formats.

Subformer

Iniciar sesión

De balde · Sen rexistro · Funciona no teu navegador

Texto a voz English gratuíto

English

Escribe ou pega texto English e escoita como se fala — todo no teu navegador, sen rexistro. O modelo de voz descargase unha soa vez (~60 MB) e gardase en caché localmente, así que as execucións subsequentes son instantáneas e funcionan sen conexión.

Premium — tamén de Subformer

Voces de calidade profesional

TTS English natural de calidade de emisión para podcasts, anuncios e narración.

Clonación de voz

Clona calquera voz a partir dun breve exemplar de audio para que poidas reutilizala noutros proxectos.

Traducir e dobrar

Traduce e dobra vídeos a máis de 30 idiomas cun só clic.

Como funciona

1. Escribe o teu texto
Pega ou escribe calquera texto English — respectanse a puntuación e as quebras de liña.
2. Xerar
Ao primeiro clic, descárgase ao teu navegador o modelo de voz de ~60 MB. Despois diso, a síntese é instantánea.
3. Descargar ou reproducir
Reproduce o audio directamente ou gárdao como un ficheiro WAV. O audio nunca sae do teu dispositivo.

O teu texto permanece no teu dispositivo

A síntese execútase integramente no teu navegador usando WebAssembly. As únicas peticións en rede son para descargar o modelo de voz Piper e o runtime ONNX — ambos son recursos públicos e estáticos. Nós non vemos o teu texto nin o audio xenerado.

Necesitas voces de calidade broadcast?

Subformer Voice Synthesis — TTS English de calidade profesional

A ferramenta gratuíta no navegador de arriba é xenial para borradores e vistas previas, pero as voces Piper soan notablemente sintéticas. A síntese de voz de pago de Subformer usa Chatterbox e Gemini TTS para audio natural de calidade profesional con clonación de voz opcional.

Proba Subformer Voice Synthesis

Texto a voz English gratuíto

Como funciona

1. Escribe o teu texto

2. Xerar

3. Descargar ou reproducir

O teu texto permanece no teu dispositivo

Subformer Voice Synthesis — TTS English de calidade profesional

Preguntas frecuentes

Proba outros idiomas TTS gratuítos