Type or paste the script you want to convert to speech.
Follow this complete step-by-step guide to connect your Cartesia AI developer account with NexusTTS. This enables high-fidelity custom voice cloning and premium text-to-speech generation.
Go to your web browser and search for 'Cartesia AI' or navigate to their official website to get started.
On the Cartesia homepage, locate and click the 'Start for Free' or 'Sign Up' button in the top right corner.
Complete the signup process using your Google account, GitHub profile, or any standard business/personal email address.
Enter the verification code sent to your registered email to complete verification and log in to the dashboard.
Once inside the dashboard, find the 'Instant Clone' section on the left sidebar menu to configure custom cloned voices.
Upload a clear 10-20 second audio sample of the voice you want to clone, enter a unique name for identification, choose the target language, and click 'Clone'.
After cloning is complete, click on the cloned voice card to reveal its details, and copy the unique 'Voice ID' (UUID format) to your clipboard.
Navigate to the 'API Keys' tab on the left menu. Click 'Create API Key', name it (e.g. 'NexusTTS'), and copy the generated credentials immediately.
Return to this page, open the Connection sidebar, paste your API Key and Voice ID in the respective fields, and click 'Save Config'. You are now ready to generate speech!
Yes, absolutely. Your Cartesia API Key is stored solely inside your browser's local storage (localStorage) and is never sent to our servers. All API requests to Cartesia are executed directly from your client-side browser.
Cartesia AI is a state-of-the-art voice synthesis provider. Its 'Sonic-3' models generate ultra-fast, natural, and expressive text-to-speech outputs, making it ideal for real-time applications and voice cloning.
For best results, upload a 10 to 30-second audio sample. Ensure the audio is clean, free of background noise or music, and that the speaker reads with a clear, natural tone and steady pacing.
Cartesia's free developer tier grants 20,000 characters. When you reach this limit, you can easily upgrade your plan in the official Cartesia developer console or contact their support team for a quota increase to continue using your custom cloned voice.