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 and Free Silence Remover
Related tool: Free Online Text-to-Speech — try it now Upgrade to Pro: unlock unlimited usage → View pricing