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Real-Time Voice Cloning — Clone Any Voice in Seconds

Clone any voice with just 5 seconds of reference audio. 9 open-source voice cloning models including Chatterbox, CosyVoice 2, GPT-SoVITS, and OpenVoice. Zero-shot cloning with no training required — upload a sample and generate speech instantly. All models are commercially licensed.

Real-Time 5-Second Samples 9 Cloning Models Open Source 17+ Languages Emotion Control
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Real-Time Voice Cloning Features

Clone voices instantly with state-of-the-art AI — no training, no datasets, no waiting

Zero-Shot Cloning

No training, no fine-tuning, no dataset collection. Upload 5 seconds of audio and get a cloned voice immediately. The AI extracts speaker characteristics in real-time.

9 Cloning Models

Choose from Chatterbox, CosyVoice 2, GPT-SoVITS, OpenVoice, Spark, IndexTTS-2, GLM-TTS, Qwen3-TTS, and Tortoise. Each model has different strengths for quality, speed, and language.

Cross-Lingual Cloning

Clone a voice in English and generate speech in Chinese, Japanese, Korean, and more. CosyVoice 2 and Qwen3-TTS preserve voice identity across 17+ languages.

Emotion Control

Chatterbox, OpenVoice, and GLM-TTS support emotion-conditioned generation. Generate the same text with different emotions — happy, sad, angry, whispering — while keeping the cloned voice.

Open Source & Commercial

Every cloning model is open source under MIT or Apache 2.0 licenses. Use cloned voices commercially for content, products, and applications with no royalties.

Cloning API

REST API for programmatic voice cloning. Upload reference audio, specify text, and receive cloned speech. SDKs for Python and JavaScript. Batch cloning for high-volume workflows.

Voice Cloning Models

9 open-source models for every cloning use case

ChatterboxChatterbox

Premium

State-of-the-art zero-shot voice cloning with emotion control from Resemble AI.

Medium 5/5 שיכפול קול

הטוב ביותר עבור: Best overall quality — 5-second samples, emotion control, MIT licensed

נסה Chatterbox

CosyVoice 2CosyVoice 2

Standard

Alibaba's scalable streaming TTS with human-parity naturalness and near-zero latency.

Medium 5/5 שיכפול קול

הטוב ביותר עבור: Best multilingual cloning — preserves voice across Chinese, English, Japanese, Korean

נסה CosyVoice 2

OpenVoiceOpenVoice

Premium

Instant voice cloning with granular control over style, emotion, and accent.

Medium 4/5 שיכפול קול

הטוב ביותר עבור: Fast tone color conversion with emotion and style transfer

נסה OpenVoice

Spark TTSSpark TTS

Standard

Voice cloning TTS with controllable emotion and speaking style via prompts.

Medium 4/5 שיכפול קול

הטוב ביותר עבור: Fastest cloning model — results in ~12 seconds

נסה Spark TTS

IndexTTS-2IndexTTS-2

Standard

Zero-shot TTS with fine-grained emotion control and high expressiveness.

Medium 4/5 שיכפול קול

הטוב ביותר עבור: Excellent Chinese-English cloning with high speaker similarity

נסה IndexTTS-2

Tortoise TTSTortoise TTS

Premium

Multi-voice text-to-speech focused on quality with autoregressive architecture.

Slow 5/5 שיכפול קול

הטוב ביותר עבור: Studio-quality results — best for audiobooks and premium narration

נסה Tortoise TTS

How Real-Time Voice Cloning Works

From a short audio sample to unlimited cloned speech

1

Upload Reference Audio

Record or upload 5-30 seconds of clear speech from the voice you want to clone. WAV, MP3, or record directly in your browser.

2

Choose a Cloning Model

Pick the model that matches your needs — Chatterbox for quality, Spark for speed, CosyVoice 2 for multilingual.

3

Enter Your Text

Type or paste the text you want spoken in the cloned voice. Any language supported by the model works.

4

Generate & Download

Click generate and hear your cloned voice in 10-25 seconds. Download as WAV or MP3 for immediate use.

How Zero-Shot Voice Cloning Works

No fine-tuning, no dataset collection — just upload and clone

Speaker Embedding Extraction

The AI analyzes your reference audio to extract a speaker embedding — a compact mathematical representation of the voice's unique characteristics including pitch, timbre, speaking rhythm, and vocal texture. This happens in under 1 second.

  • Works with as little as 5 seconds of audio
  • Captures pitch, timbre, and speaking style
  • No training or fine-tuning required
  • Audio is never stored permanently

Conditioned Speech Synthesis

The TTS model generates new speech conditioned on the speaker embedding. The result sounds like the reference speaker saying your text — with natural prosody, appropriate emphasis, and the original voice's character preserved across any language or content.

  • Generate unlimited speech from a single sample
  • Cross-lingual cloning (speak in languages the reference didn't)
  • Emotion and style transfer
  • Results in 10-25 seconds

Voice Cloning Model Comparison

Choose the right model for your cloning use case

Model Min. Reference Speed Quality Languages Emotion License
Chatterbox 5s ~21s Best EN MIT
CosyVoice 2 5s ~20s Excellent CN, EN, JP, KO+ Apache 2.0
GPT-SoVITS 5s ~16s Excellent CN, EN, JP, KO MIT
OpenVoice 5s ~15s Good EN, CN, ES, FR+ MIT
Spark TTS 5s ~12s Good CN, EN Apache 2.0
IndexTTS-2 5s ~18s Excellent CN, EN Apache 2.0
GLM-TTS 5s ~25s Excellent CN, EN Apache 2.0
Qwen3-TTS 5s ~16s Excellent CN, EN, JP, KO+ Apache 2.0
Tortoise 15s ~60s Studio EN Apache 2.0

What People Use Real-Time Voice Cloning For

From content creation to accessibility — voice cloning has endless applications

Audiobook Narration

Authors clone their own voice and generate entire audiobooks without spending hours in a recording booth. Edit mistakes by regenerating single sentences instead of re-recording.

Video Dubbing

Dub videos into other languages while keeping the original speaker's voice. Cross-lingual models like CosyVoice 2 and Qwen3-TTS preserve voice identity across Chinese, English, Japanese, and Korean.

Content Creation

YouTubers, podcasters, and TikTok creators clone their voice for consistent branding. Generate voiceovers for new content without recording, or create alternate-language versions of existing videos.

Accessibility

People who have lost their voice due to illness or surgery can preserve it by cloning from old recordings. The cloned voice lets them communicate in their own voice through text-to-speech.

Game Development

Clone voice actors and generate unlimited dialogue variations without scheduling studio time. Perfect for indie games, mods, and prototyping where re-recording every line isn't feasible.

IVR & Phone Systems

Clone your company spokesperson's voice for phone menus and automated responses. Update IVR prompts instantly without booking a voice actor — just type new text and generate.

TTS.ai vs Other Voice Cloning Solutions

Why 9 models beats a single open-source project

Feature TTS.ai SV2TTS ElevenLabs Resemble AI
Cloning Models 9 1 1 1
Min. Reference Audio 5 sec 5 sec 30 sec 3 min
Training Required No No No Yes
Audio Quality (2025) Studio-grade Dated Excellent Excellent
Emotion Control
Cross-Lingual Cloning
Open Source
GPU Required Cloud Yes Cloud Cloud
API Access
Free Tier 15 credits Self-host Limited

Voice Cloning API

Clone voices programmatically with our REST API

Python — Voice Cloning REST API 
from tts_ai import TTSClient

client = TTSClient(api_key="sk-tts-...")

# Clone a voice from a 5-second sample
result = client.clone_voice(
    name="My Cloned Voice",
    file="reference.wav",       # 5-30 seconds of clear speech
    model="chatterbox",         # or cosyvoice2, openvoice, spark...
    text="Hello! This is my cloned voice speaking new text.",
)

# Download the cloned audio
audio = client.poll_result(result.uuid)
with open("cloned_output.wav", "wb") as f:
    f.write(audio)
cURL — Voice Cloning REST API 
curl -X POST https://api.tts.ai/v1/voice-clone \
  -H "Authorization: Bearer sk-tts-YOUR_KEY" \
  -F "reference=@voice_sample.wav" \
  -F "text=This is my cloned voice." \
  -F "model=chatterbox"

Tips for Best Voice Cloning Results

Get the most accurate voice clone with these recording guidelines

Quiet Environment

Record in a quiet room with minimal background noise. The AI extracts voice features more accurately from clean audio.

10-30 Seconds

While 5 seconds works, 10-30 seconds gives significantly better results. The more natural speech the AI hears, the more accurate the clone.

Natural Speech

Speak naturally, not in a monotone. Include varied intonation and pacing. The AI captures your natural speaking style, including pauses and emphasis.

Single Speaker

Use a sample with only one person speaking. Multiple voices confuse the speaker embedding and produce blended results.

Start Cloning Voices Today

Upload 5 seconds of audio and hear your cloned voice in under 30 seconds. Free to try.

Clone a Voice Now API Documentation

שאלות ששואלים לעתים קרובות

Common questions about real-time voice cloning

Real-time voice cloning is AI technology that can replicate a person's voice from a short audio sample — as little as 5 seconds — without any training or fine-tuning. You upload a sample, and the AI generates new speech that sounds like that person. TTS.ai offers 9 different voice cloning models, each with different strengths for quality, speed, and language support.

As little as 5 seconds works with most models (Chatterbox, CosyVoice 2, Spark, GPT-SoVITS, OpenVoice). Tortoise requires 15+ seconds for best results. For optimal quality across all models, 10-30 seconds of clear, single-speaker audio is recommended. The audio should be free of background noise and music.

Voice cloning technology itself is legal. However, you should only clone voices you have permission to use — your own voice, voices you have explicit consent for, or voices in the public domain. Using voice cloning to impersonate someone without consent, commit fraud, or create misleading content is illegal in most jurisdictions. TTS.ai's terms require you to have rights to any voice you clone.

It depends on your use case. Chatterbox produces the highest quality English clones with emotion control. CosyVoice 2 is best for multilingual cloning (Chinese, English, Japanese, Korean). Spark is the fastest at ~12 seconds. Tortoise produces studio-quality results but is slower. GPT-SoVITS excels at Chinese voice cloning. Try multiple models to find the best match for your voice.

Yes — this is called cross-lingual voice cloning. CosyVoice 2, Qwen3-TTS, and OpenVoice support it. For example, you can upload an English voice sample and generate speech in Chinese, Japanese, or Korean while preserving the speaker's vocal characteristics. The quality varies by model and language pair.

The CorentinJ/Real-Time-Voice-Cloning GitHub project (60K+ stars) uses SV2TTS, a 2019 architecture. While groundbreaking at the time, modern models like Chatterbox, CosyVoice 2, and GPT-SoVITS produce significantly better audio quality with better speaker similarity. TTS.ai runs 9 state-of-the-art models (vs SV2TTS's one) and requires no GPU setup — just upload and clone.

Yes. TTS.ai provides a REST API for voice cloning. Upload reference audio and text, choose a model, and receive cloned speech. Available via Python SDK (`pip install ttsai`), JavaScript SDK (`npm install @ttsainpm/ttsai`), or direct HTTP requests. Supports batch cloning for processing multiple texts with the same cloned voice.

Yes. After cloning, save the voice to your account and reuse it across unlimited generations without re-uploading the reference audio. Saved voices appear in your voice library on the voice cloning page and are accessible via the API.

WAV, MP3, OGG, FLAC, and WebM are all supported. You can also record directly in your browser using the built-in microphone recorder. For best results, use lossless WAV format at 16kHz or higher. The AI automatically preprocesses audio (resampling, noise filtering) regardless of input format.

Generation time varies by model: Spark is fastest at ~12 seconds, OpenVoice at ~15 seconds, GPT-SoVITS at ~16 seconds, CosyVoice 2 at ~20 seconds, Chatterbox at ~21 seconds, and Tortoise at ~60 seconds. These times are for typical sentence-length text. Longer texts take proportionally longer.

Yes. All 9 cloning models on TTS.ai use open-source licenses (MIT or Apache 2.0) that permit commercial use. You can use cloned audio in YouTube videos, podcasts, audiobooks, apps, games, phone systems, and any other commercial application — provided you have rights to the source voice.

Yes. Every model we run is open source and available on GitHub/HuggingFace. You can self-host Chatterbox, CosyVoice 2, GPT-SoVITS, OpenVoice, Spark, IndexTTS-2, GLM-TTS, Qwen3-TTS, or Tortoise on your own GPU server. Most models require an NVIDIA GPU with 4-24GB VRAM depending on the model. TTS.ai handles all the infrastructure so you don't have to.
5.0/5 (1)

Clone Any Voice in Seconds

9 open-source voice cloning models. 5-second samples. No training required. Try it free — upload your audio and hear the clone instantly.

הרשמה חופשית תצוגה של Princing