F5-TTS

Premium

Fast, Fluent, and Faithful Text-to-Speech with Cloning

Try Free F5-TTS Browse Voices (0)
Fast Speed
Very Good Quality
Yes Cloning
5 Languages

About F5-TTS

F5-TTS is a non-autoregressive text-to-speech model that achieves fast inference while maintaining high quality and supporting voice cloning. Using flow matching techniques, it generates natural speech with excellent fluency and faithfulness to reference voices. F5-TTS offers a great balance between speed, quality, and cloning capability.

Key Features

Fast Generation

Non-autoregressive architecture for rapid speech synthesis.

Zero-Shot Cloning

Clone any voice from a short audio sample without fine-tuning.

High Fidelity

Flow matching produces natural, high-quality speech output.

Natural Fluency

Smooth prosody and natural rhythm throughout.

Multilingual

Supports multiple languages with natural pronunciation.

Open Source

MIT licensed for full commercial use.

Use Cases

Content Creation Video Dubbing Audiobook Production Podcast Generation Personalized Assistants Real-Time Applications

How to Use F5-TTS

  1. 1

    Sign up free or open the demo

    Create a free TextToSpeechAI account to receive starter credits, or jump straight into the free demo to try F5-TTS with no payment required.

  2. 2

    Choose F5-TTS and (optionally) upload a reference clip

    Select F5-TTS as your engine. To clone a voice, upload a short 10-30 second reference sample of the target speaker so F5-TTS can capture their tone and accent zero-shot; skip this step to use a built-in F5-TTS voice.

  3. 3

    Enter your text

    Type or paste the text you want spoken. F5-TTS reads it naturally in your chosen or cloned voice, with smooth prosody across multiple supported languages.

  4. 4

    Generate the speech

    Click generate and F5-TTS synthesizes your audio quickly on our GPU infrastructure, billed at the Premium rate of 25 credits per 1000 characters.

  5. 5

    Download or use the API

    Download the finished audio as MP3, WAV, or OGG, or call the TextToSpeechAI API with your F5-TTS voice ID to automate generation in your own apps.

F5-TTS API

Generate speech programmatically using the TextToSpeechAI REST API.

curl -X POST "https://api.texttospeechai.com/v1/generate/" \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "F5\u002DTTS delivers fast, fluent speech with impressive voice cloning capabilities.",
    "voice": "en_US-lessac-medium"
  }'
Read API Docs Get Your API Key

Frequently Asked Questions

F5-TTS (Fast, Fluent, Faithful TTS) is a modern text-to-speech model that uses flow matching for efficient, high-quality speech synthesis. It supports zero-shot voice cloning and generates natural speech faster than traditional autoregressive models. On TextToSpeechAI, F5-TTS is the default engine used for voice cloning.

F5-TTS clones a voice zero-shot, with no training required: you upload a short reference recording of the target speaker, and the model extracts their vocal characteristics on the fly. It then synthesizes any text in that cloned voice, capturing tone, accent, and prosody from the sample.

F5-TTS can clone a voice from a short reference clip of roughly 10 to 30 seconds of clean speech. A clear, noise-free recording produces the most faithful results, and you do not need hours of training data the way older cloning systems did.

Yes. F5-TTS code is MIT licensed, and TextToSpeechAI runs the OpenF5-TTS-Base weights, which are released under the commercially permissive Apache 2.0 license. That combination makes F5-TTS safe to use in commercial products, provided you have the rights to any voice you clone.

Yes. F5-TTS uses a non-autoregressive flow-matching architecture, so it generates speech much faster than autoregressive models like Bark or Tortoise. This makes it well suited to real-time and high-volume workloads while still sounding natural.

F5-TTS produces high-quality audio with natural prosody, smooth rhythm, and clear articulation. It strikes an excellent balance of quality and speed, making it a strong default for most content, narration, and cloning use cases.

F5-TTS is faster and lighter on VRAM, making it ideal when you need quick turnaround or large batches, and it is TextToSpeechAI's default cloning engine. StyleTTS2 is an ultra-tier engine that can edge out F5-TTS on raw fidelity, so choose StyleTTS2 when maximum quality matters more than speed and cost.

F5-TTS supports English, Chinese, and several other languages with natural pronunciation. It also handles cross-lingual cloning, letting you use a cloned voice to speak a language different from the original reference recording.

F5-TTS is memory-efficient, typically requiring about 4-6GB of VRAM. On TextToSpeechAI all generation runs on our GPU infrastructure, so you do not need a local GPU to use it.

F5-TTS is a Premium-tier engine on TextToSpeechAI, billed at 25 credits per 1000 characters. New accounts receive free starter credits, so you can test F5-TTS, including voice cloning, before purchasing more.

Yes. You can try F5-TTS through the free demo on TextToSpeechAI without any payment, and creating a free account grants starter credits so you can generate speech and clone a voice. Upgrade only when you need more characters.

Select an existing F5-TTS voice from our library, or create a cloned voice by uploading reference audio, then pass that voice ID in your API requests. F5-TTS outputs WAV natively, and TextToSpeechAI can return MP3, WAV, or OGG with automatic conversion.

Technical Specs

  • Generation Speed Fast
  • Output Quality Very Good
  • Voice Cloning Supported
  • Languages 5
  • GPU VRAM 3-4GB
  • Credits/1000 chars 25

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