omni voice is a free, open-source AI voice generator that supports 646 languages. It converts text to natural-sounding speech, clones voices from a short audio sample (zero-shot voice cloning), or creates a voice from a text description alone (voice design). Developed by the k2-fsa research team and trained on 581,000 hours of open-source speech data.

Is omni voice really free?

Yes. omni voice is released under Apache 2.0 — free for personal and commercial use, with no subscription fee, no character limits, and no hidden costs.

How many languages does omni voice support?

omni voice supports 646 languages — the broadest coverage of any zero-shot TTS model. This includes major languages like English, Japanese, Spanish, and Arabic, as well as hundreds of low-resource languages most TTS tools don't support.

How does omni voice voice cloning work?

Voice cloning in omni voice is zero-shot: provide a 3–30 second audio reference, and omni voice immediately extracts the speaker's voice profile to generate new speech — no model training required. It also works cross-lingually: clone a voice from an English recording and synthesize it in any other supported language.

How does omni voice compare to ElevenLabs?

In an independent 24-language benchmark, omni voice achieved 2.85% word error rate vs. ElevenLabs' 10.95%, and higher speaker similarity (0.830 vs. 0.655). omni voice also supports 646 languages vs. ElevenLabs' 32, and is free and open source vs. $5–$1,320/month.

What is Voice Design?

Voice Design lets you create a voice without any audio reference — just describe it in text: 'female, low pitch, British accent, calm.' omni voice generates a matching speaker voice from the description. This feature is unique to omni voice and not available in ElevenLabs or PlayHT.

Can I use omni voice in a commercial product?

Yes. Apache 2.0 explicitly permits commercial use. omni voice was also trained exclusively on open-source datasets, so there are no hidden licensing risks.

Does omni voice require a GPU?

omni voice supports NVIDIA GPU (CUDA 12.8), Apple Silicon, and CPU. For production use, a GPU is recommended — on an H20 GPU it runs at ~45× real-time speed.

How many languages does the text to speech generator support?

The omni voice text to speech generator supports 646 languages — the broadest coverage of any free TTS tool. This includes English, Mandarin, Spanish, Arabic, Swahili, Welsh, Tok Pisin, and hundreds more.

What's the difference between Text to Speech, Voice Cloning, and Voice Design?

Text to Speech generates natural speech from text using an automatically selected voice. Voice Cloning replicates a specific speaker from a 3–30 second audio sample you upload. Voice Design creates a custom voice from a text description — no audio required.

How long can my input text be?

The online generator supports up to 500 characters per generation. For longer documents, omni voice can be self-hosted via the open-source release with no character limits.

What audio format does the generator output?

Generated audio is delivered as a .wav file, playable in any browser or audio app. You can download it immediately after generation — no account needed.

Can I use the generated audio commercially?

Yes. omni voice is licensed under Apache 2.0, which explicitly permits commercial use of both the model and its output. It was also trained exclusively on open-source data, so there are no hidden licensing restrictions.

How accurate is the text to speech output?

In a 24-language benchmark, omni voice achieved 2.85% word error rate — versus 10.95% for ElevenLabs. Across most languages, the output is accurate enough for professional use without manual correction. (Source: arXiv 2604.00688)

Does voice cloning work across languages?

Yes. Upload an English reference clip, and omni voice can generate speech in Mandarin, French, Arabic, or any of 646 other languages using the same cloned voice. No additional samples needed per language.

Omni Voice Generator

Omni Voice Text To Speech Generator

Free · 646 Languages · Voice Cloning · Voice Design · No Account Required

0 / 500

Language

Drag and drop your audio file here

Generate speech to preview your result here.

What People Are Creating With omni voice

"Natural narration for a product explainer video"

Language: English (en)

Mode: Text to Speech

"Cross-lingual clone from English reference"

Language: Mandarin (en)

Mode: Voice Cloning

"Right-to-left language rendered natively"

Language: Arabic (ar)

Mode: Text to Speech

"female, low pitch, calm — no audio needed"

Language: French (fr)

Mode: Voice Design

"One of 646 supported languages"

Language: Swahili (sw)

Mode: Auto Voice

"[laughter] expression token demo"

Language: Japanese (ja)

Mode: Text to Speech

How to Use the omni voice Text to Speech Generator

Text box screenshot highlighting input area

Step 1

Enter Your Text

Paste up to 500 characters of text — any language, any topic. omni voice handles punctuation, abbreviations, and numerals automatically.

Step 2

Pick Your Voice Mode

Use Text to Speech for a clean generated voice. Upload a reference clip for Voice Cloning — as short as 3 seconds. Or describe a voice in words for Voice Design.

Result player screenshot highlighting Download button

Step 3

Generate, Play, and Download

Click Generate Speech. Your audio is ready in seconds. Download as .wav or copy a share link to send to anyone.

646 Languages. One Text to Speech Generator.

Most TTS tools support a handful of major languages. omni voice supports 646 — from the most widely spoken to languages most platforms have never touched.

Most Popular

↓

English · Mandarin · Spanish · Hindi · Arabic · French · Portuguese · Russian · Japanese · German · Korean · Italian

Africa & Middle East

↓

Swahili · Hausa · Amharic · Yoruba · Zulu · Arabic (MSA) · Somali · Tigrinya · Wolof · ···

Asia Pacific

↓

Mandarin · Cantonese · Japanese · Korean · Vietnamese · Thai · Tagalog · Malay · Bengali · Tamil · Tok Pisin · ···

Europe

↓

English · German · French · Spanish · Italian · Polish · Welsh · Catalan · Basque · Faroese · ···

Americas & Indigenous

↓

English · Spanish · Portuguese · Quechua · Guaraní · Haitian Creole · ···

Generate Speech in Your Language →

[ SHOWCASE ]

Omni Voice in Action

Listen to what our community and customers are building with Omni Voice.

Audiobook Narration

Long-form content generation

NPC Dialogue

Dynamic game character voices

Podcast Intro

Professional studio quality

Language Tutor

Clear, articulate pronunciation

Customer Support

Empathetic conversational agent

News Anchor

Authoritative broadcast style

Frequently Asked Questions

Everything you need to know about the omni voice text to speech generator.

Yes — completely free. No account, no subscription, no character limits per generation. omni voice is open source under Apache 2.0, so you can also self-host it on your own server at zero cost.