# OfflineTTS: Free Browser-Based Speech and Text Conversion Tool

Protect your privacy with locally running AI audio tools.

- **Source:** [Hacker News: Show HN](https://news.ycombinator.com)
- **Published:** 2026-07-19
- **Topic:** [Data & AI](https://brifing.si/c/data-ai)
- **Original article:** <https://offlinetts.com/>
- **On Brifing:** https://brifing.si/s/03e2b035-8e71-4f71-aae3-593fbe600078

## What is OfflineTTS?

OfflineTTS is a free browser-based speech and text conversion tool. It combines text-to-speech, speech-to-text, subtitle generation, and document-to-audio conversion in one platform. All processes occur locally, enhancing privacy.

## How Does It Work?

OfflineTTS runs AI models directly in your browser using WebGPU and WebAssembly. Engines like Kokoro, Kitten, Piper, and Supertonic handle text-to-speech, while Whisper handles speech-to-text. Models can work offline after download.

## Why Is It Free?

OfflineTTS is completely free because the models run on the user's hardware. There are no server costs, API keys, or subscriptions. This allows users unlimited usage.

## Offline Usage

English text-to-speech conversion works fully offline after model download. Non-English languages use lightweight phoneme conversion. Whisper speech-to-text also works offline.

## Use Cases

OfflineTTS is designed for creators, accessibility, education, and private research. It is ideal for narration, transcription, subtitle creation, and document-to-audio conversion.

## Why Choose It?

OfflineTTS stands out with its privacy-focused browser processing, free usage, and direct export features. It offers a reliable solution for voice, transcript, subtitle, and document audio workflows.

## Sources covering this story

- https://offlinetts.com/ — 

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_Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._