> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bibigpt.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Free Online Text-to-Speech

> Convert text to natural speech in your browser using the Kokoro-82M AI model. 22+ voices across Chinese, English and Japanese, 100% local processing, downloadable WAV. Up to 5,000 characters per generation.

## Overview

BibiGPT Free Online Text-to-Speech synthesizes natural-sounding voice from any text, directly inside your browser. Chinese, English and Japanese output is powered by the open-source Kokoro-82M neural model (one-time \~86MB download, then cached locally). Korean, Spanish, French, German and other languages fall back to the browser's built-in Web Speech API. Inference runs 100% on your device — your text never leaves the browser.

## Problem It Solves

Mainstream TTS services usually require an account, a subscription, or upload your script to the cloud. That's a friction for personal video dubs, internal training narration, audio-book prototyping or game script tests where you don't want to hand your text over to a third party. This tool lets you generate downloadable audio entirely in the browser — no credit card, no leakage risk.

## Key Features

* **Open-source Kokoro-82M model**: natural, emotive Chinese/English/Japanese output on-device
* **22+ AI voices**: male/female, youth/mature, narrator/announcer styles selectable per language
* **Browser TTS fallback**: Korean, Spanish, French, German and more via the OS speech engine
* **Up to 5,000 characters per run**: covers short-video dubs, podcast openers, lesson clips
* **One-click WAV download**: drop straight into your video editor, podcast DAW, PPT, or game
* **100% local processing**: no server upload, no third-party access; works offline after the first model download

## What Makes It Different

Kokoro-82M is an 82-million-parameter open TTS model that still produces quality comparable to cloud giants — while running entirely client-side. Pairing it with Web Speech API fallback, one page covers the most common voiceover scenarios. No signup, no limits, no watermark.

## Use Cases

* **Content creation**: short-video / blog post voiceovers without monthly TTS subscription fees
* **Accessibility**: turn long articles, docs or emails into audio for commute listening
* **Language learning**: play back vocabulary, example sentences and full paragraphs in native pronunciation
* **Podcast & course narration**: auto-generate placeholder narration to time your script before human re-recording
* **Games & interactive prototypes**: rapid NPC dialogue placeholders during iteration

## Tips

* First use downloads the Kokoro model (\~86MB) — do it on Wi-Fi, then it works offline
* For scripts longer than 5,000 characters, split into sections to keep browser memory healthy
* Kokoro quality is highest for zh/en/ja; other languages use the OS TTS engine and quality varies by device
* To post-process output (noise, EQ, pacing), pair with BibiGPT's [Free Audio Noise Remover](https://bibigpt.co/features/free-audio-noise-remover) and [Free Silence Remover](https://bibigpt.co/features/free-online-audio-silence-remover)

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**Related tool**: [Free Online Text-to-Speech](https://bibigpt.co/features/free-text-to-speech-online) — try it now

**Upgrade to Pro**: unlock unlimited usage → [View pricing](https://bibigpt.co/pricing)

## Related

<CardGroup>
  <Card title="Free Speech-to-Text Online" href="/en/function-usage/platform-function/free-speech-to-text-online" />

  <Card title="Free Online Voice Recorder" href="/en/function-usage/platform-function/free-online-voice-recorder" />

  <Card title="Free Audio Noise Remover" href="/en/function-usage/platform-function/free-audio-noise-remover" />

  <Card title="Free Online Silence Remover" href="/en/function-usage/platform-function/free-online-audio-silence-remover" />
</CardGroup>