Try KittenTTS Online for Free
Ultra-lightweight text-to-speech that runs anywhere. Choose from 8 expressive voices, pick your quality tier, and generate speech directly in your browser.
Try KittenTTS FreeWhy KittenTTS
Why Use KittenTTS for Text-to-Speech
KittenTTS is an open-source, ultra-lightweight TTS model by KittenML. Built on StyleTTS 2 architecture and optimized with ONNX runtime and INT8+FP16 quantization, it delivers high-quality speech synthesis on virtually any device.
With models as small as 41 MB, KittenTTS runs on Raspberry Pis, smartphones, wearables, and browsers. Two quality tiers let you choose between speed and fidelity.
Ultra-Lightweight
The Micro model is just 41 MB and the Mini is 80 MB. Small enough to run on edge devices, embedded systems, and low-end hardware.
Two Quality Tiers
Micro (40M parameters) for speed and real-time use. Mini (80M parameters) for higher-quality final output. Pick the tier that fits your needs.
8 Expressive Voices
Choose from Bella, Jasper, Luna, Bruno, Rosie, Hugo, Kiki, and Leo. Each voice has a distinct character and tone.
Speed Control
Adjust playback speed from 0.5x to 2.0x. Slow it down for narration or speed it up for quick previews.
Get Started
How It Works
Open the free tool
Go to the KittenTTS tool in your browser. No download or signup required.
Pick a voice and quality tier
Choose from 8 built-in voices and select either Micro for fast generation or Mini for higher quality output.
Type your text and generate
Enter the text you want spoken, adjust the speed if needed, then hit generate. Your speech is ready in seconds.
Use Cases
Who Is KittenTTS For?
Quick Voiceovers
Generate voiceovers for videos, presentations, or social media content in seconds. Pick a voice, type your script, and export.
Developers
Build TTS into embedded, edge, or IoT applications. KittenTTS is small enough for Raspberry Pi, smartphones, and wearables.
Students and Educators
Turn notes, study guides, or lesson content into spoken audio. Great for accessibility and auditory learning.
Anyone on Low-End Hardware
No GPU required. KittenTTS runs smoothly on older computers, budget phones, and minimal hardware setups.
Getting the Most Out of KittenTTS
Tips for Best Results
Use Mini for final output, Micro for drafts
The Mini tier (80M parameters) produces higher-quality audio and is best for polished, final recordings. Use Micro (40M parameters) when you need fast iteration or are testing different scripts.
Try different voices for different tones
Each of the 8 voices has its own character. Experiment with Bella, Luna, or Kiki for warmer tones. Try Jasper, Bruno, or Hugo for deeper, more authoritative reads.
Adjust speed for the context
Slow down to 0.7x or 0.8x for narration and storytelling. Speed up to 1.2x or 1.5x for dialogue, notifications, or quick previews. The full range is 0.5x to 2.0x.
Voice Creator Pro
Need more power? Try Voice Creator Pro.
Voice Creator Pro offers GPU acceleration, voice cloning in 600+ languages, voice design from text, a local REST API, and a commercial license. All for a one-time purchase of $49.99.
GPU-Accelerated Processing
Faster generation with NVIDIA, Apple Silicon, AMD, and Intel GPU support
Voice Cloning in 600+ Languages
Clone any voice from a short audio sample across 600+ languages with open-source models
Voice Design from Text
Describe a voice in plain text and the AI creates it. No audio samples needed
Local REST API
Automate voice generation in your own apps and workflows
Commercial License
Full rights to use generated audio in commercial projects. One-time $49.99 purchase
All Models in One App
Access KittenTTS, Kokoro, Chatterbox, and many more models in a single desktop application
FAQ
Common Questions
KittenTTS is an ultra-lightweight, open-source text-to-speech model created by KittenML. It is based on StyleTTS 2 architecture, optimized with ONNX runtime and INT8+FP16 quantization to run on virtually any device, from Raspberry Pis to smartphones to web browsers.
KittenTTS was developed by KittenML, a team focused on making high-quality TTS accessible on low-resource hardware. They released it as an open-source model so anyone can use and build on top of it.
KittenTTS offers two quality tiers. Micro is the smaller model at 40M parameters (41 MB), optimized for speed and minimal resource usage. Mini is the larger model at 80M parameters (80 MB), delivering higher audio quality. Use Micro for drafts or real-time applications and Mini for final, polished output.
KittenTTS includes 8 built-in voices: Bella, Jasper, Luna, Bruno, Rosie, Hugo, Kiki, and Leo. Each voice has a distinct tone and character, so you can choose the one that best fits your project.
Yes. KittenTTS is open-source software. On this site, it runs directly in your browser with no account, no signup, and no usage limits.
No. KittenTTS is a built-in-voice-only model. It does not support voice cloning. If you need voice cloning, try Chatterbox Turbo on this site, or use Voice Creator Pro for advanced cloning in 600+ languages.
Not at all. KittenTTS is designed to run on extremely low-resource hardware. The Micro model is as small as 41 MB and can run on devices like Raspberry Pis, smartphones, and wearables. Any modern browser on any computer or phone should handle it easily.
Chrome, Edge, and other Chromium-based browsers work best. Firefox and Safari have limited support for the WebGPU features used for acceleration.