Is my text private when using this voiceover generator?

Yes, 100% private. All text-to-speech processing happens locally in your browser using the Kokoro-82M AI model. Your text and generated audio never leave your device - no data is sent to any server.

What voices are available and what do the quality grades mean?

The tool offers 27 voices with quality grades from A to F. Grade A/A- voices (Heart, Bella, Nicole, Emma) are best for long-form content. Grade B-/C+ voices work well for medium content. Lower grades (D/F) are suitable for short content only. Each voice card shows its grade to help you choose.

What is the difference between WASM and WebGPU?

WASM (default) uses CPU processing with a smaller ~92MB model - it works on all modern browsers. WebGPU uses GPU acceleration with a larger ~326MB model for potentially faster processing, but requires Chrome 113+ or Edge 113+. Most users should stick with WASM unless they have a powerful GPU.

Can I use this tool offline?

Yes! Once the AI model is downloaded and cached (first use only), you can generate voiceovers without an internet connection. A green 'Offline Mode Available' message confirms when offline mode is ready. Your generation history is also saved locally.

What audio format is the output?

Generated voiceovers are exported as WAV files at 24kHz sample rate with 16-bit depth. WAV is a universal format compatible with all video editors, audio software, and media players.

Which browsers support this tool?

WASM mode works in all modern browsers: Chrome, Edge, Firefox, and Safari. WebGPU mode requires Chrome 113+ or Edge 113+. For optimal performance, use Chrome or Edge on desktop. The AI model is cached after first download.

Is there a text length limit?

Yes, the maximum text length is 3,000 characters per generation. Longer texts are automatically split into chunks at sentence boundaries and processed sequentially, then seamlessly combined into a single audio file. For texts over 1,000 characters, we recommend using A or A- grade voices for best quality.

How do I download multiple voiceovers at once?

Use the 'Download all' button in the Generation History section to download all your generated voiceovers as individual WAV files. You can also download each voiceover individually using the download button on each history item.

Can I cancel a download or generation in progress?

Yes! Click the Cancel button on the progress card to stop a model download or audio generation at any time. If you cancel a download, the partial data is discarded and you can try again later. Cancelling generation stops processing immediately.

How do I manage cached models and free up storage?

The 'Cached' section shows which models (WASM/WebGPU) are downloaded. Click the X button next to a model to delete it from your browser cache. This frees up storage (~92MB for WASM, ~326MB for WebGPU) but means the model will need to download again on next use.

AI Voiceover Generator - Free Text to Speech with 27 Voices

How to Use

Choose your processing engine: WASM (default, ~92MB) or WebGPU (~326MB) for GPU acceleration.
Enter or paste your script text in the text area (up to 3,000 characters - longer texts are automatically chunked).
Browse and select from 27 voices - quality grades (A to F) help you choose the best voice for your content.
For longer texts (1000+ characters), use recommended voices: Heart (A), Bella (A-), Nicole (B-), or Emma (B-).
Click the preview button on any voice to hear a sample (model loads on first use, cached for future visits).
Adjust the speech speed using the slider (0.5x to 2.0x) or preset buttons.
Click Generate to create your voiceover - the AI model loads automatically on first use.
Use the audio player to preview, then download your voiceover as a WAV file.
Access your generation history to replay, copy text, or download previous voiceovers.

How it Works

This tool uses Kokoro-82M, a state-of-the-art text-to-speech model that runs entirely in your browser. The model delivers natural-sounding speech without sending any data to external servers.

27 Graded Voices

Quality grades (A-F) help you choose the best voice for your content length

100% Private

All processing happens locally - your text never leaves your device

Offline Mode

Works without internet after first model download - fully cached locally

Generation History

Access up to 10 recent voiceovers with playback, copy, and download options

Cancel Anytime

Cancel model downloads or audio generation at any point with one click

Manage Cached Models

View and delete cached WASM/WebGPU models to free up browser storage

WASM or WebGPU

Choose WASM for compatibility or WebGPU for GPU-accelerated processing

WAV Export

Download high-quality 24kHz audio files individually or all at once

Voice Quality Guide

Each voice has a quality grade based on training duration. Higher grades produce more natural speech, especially for longer content.

A/A-Excellent quality - Best for all content, especially long-form

B-Good quality - Suitable for medium-length content

C+/C/C-Acceptable - Works for most content, better for shorter texts

D/FLimited - May have quality issues, short content only

Common Use Cases

Content Creation

• Create YouTube video narrations without recording equipment
• Generate podcast intros and outros with consistent voice
• Add voiceovers to social media reels and TikTok videos
• Produce audiobook samples for self-published authors

Business & Education

• Create professional presentation narrations
• Generate e-learning course audio content
• Produce training video voiceovers for employees
• Add voice to product demo videos and tutorials

Accessibility

• Convert written content to audio for visually impaired users
• Create audio versions of blog posts and articles
• Generate spoken instructions for accessibility compliance

Development & Testing

• Prototype voice interfaces before production integration
• Test TTS outputs for app development without API costs
• Generate placeholder audio for mockups and wireframes

AI Voiceover Generator