How AI Voice Narration Works
Browser-native text-to-speech via Web Speech API. Pick from system-installed voices. 0 MB download.
Try it free →Step-by-step process
- 1
Add your text
Drop or select the text you want to process — it stays on your device.
- 2
Run the model in-browser
AI Voice Narration runs instantly with no download — the work happens locally in a worker.
- 3
Download the audio
Preview the result and download the audio. Re-run with different settings anytime.
Frequently asked questions
Available now?
Voice cloning needs a hosted TTS/voice model — connect your endpoint on the Pro tier. Use only with consent.
Is it free to use?
Yes — AI Voice Narration is completely free. No account, no watermark, no credits, and no usage limits.
Do my files or prompts ever leave my device?
No. Everything runs locally in your browser via WebAssembly/WebGPU — there is no server that receives your files, prompts, or results.
Which browser and hardware do I need?
A modern browser. Chrome and Edge get WebGPU acceleration for the fastest results; Firefox and Safari run via WebAssembly. This tool downloads nothing and runs on any device.
Can I use the results commercially?
Yes. You own everything you create — NSS makes no claim to the images, videos, or text you process or export.
Does it work on mobile?
Yes — it runs on phones and tablets too, since there is no model download.
Where can I see a step-by-step guide?
Yes — there is a full walkthrough at /how-it-works/ai-voice-clone.