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Voice AI Labs

AI audio

Voice AI Labs is an AI voice tool focused on voice cloning, text-to-speech (TTS), and voice-to-voice conversion (V2V). According to the official introduction, uploading a voice sample of about 10 seconds allows you to generate a high-fidelity AI voice clone in about 20 seconds, with the claimed cloning similarity reaching 99%. It supports 8 languages including English, Chinese, Japanese, and German, and the same cloned voice can be used for multilingual reading. The platform provides the Voice Square community voice library, allowing one-click use of thousands of voice models published by the community; it supports online recording in the browser, professional text dubbing (with control over emotion, speed, and pitch), and voice conversion (preserving the original speaker's tone, pauses, and emotion while only changing the timbre). For developers, it provides a low-latency RESTful API for easy integration into applications and services. Registration comes with 5,000 free credits, allowing users to start for free, and it also supports trying without recording. The official statement emphasizes that all data is encrypted and no one except the user can access it. It is suitable for voice generation scenarios such as content creation, education, and entertainment. Information such as the actual pricing plans, specific prices, details of language support, and commercial use terms has not yet been provided.

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Voice Art

AI audio

Voice Art is an AI voice generation tool used in the browser, integrating text-to-speech, voice cloning and voice design features. Users can paste text, choose a voice from the public voice library, or create a private clone using authorized audio samples, and can also design synthetic voices by describing age, energy, accent and character. Free accounts can generate 120 characters of speech per session, and paid plans and credit packs can increase the per-conversion limit to 1000 characters. The tool provides generation history, audio download, multilingual script processing, and workflows for creators and developers, suitable for scenarios such as narration, ads, courses, product audio and prototype voices.

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Voice Changer.io

AI audio

Voice Changer.io is a free online voice changing tool. After users upload or record audio, they can apply dozens of voice effects to change their voice, such as making it deeper, turning it into a female or male voice, making it sound like a robot, Darth Vader, a monster, and more. It can also be used for anonymization. All generated audio clips can be used for any purpose, including commercial use, and no attribution is required. The tool offers a variety of preset voice effects such as Monster, Robot, Deep, Chipmunk, and more, and also supports custom voice effects. The website also mentions other projects such as an AI image generator.

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voice-lab

AI developer platforms

Voice Lab is a testing and evaluation framework for voice agents, open-sourced by saharmor on GitHub. It is used for systematic testing and performance evaluation across language models, prompts, and agent personas, helping developers make data-driven decisions when switching models, optimizing prompts, or adjusting persona settings. Although optimized for voice agents, it is also suitable for any LLM-based agent evaluation scenario. Currently, it only supports the text portion of voice agents, that is, testing the underlying language model and prompts.

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VoiceEnhancer AI

AI audio

VoiceEnhancer AI is a free online AI voice enhancement tool that requires no login or download and supports uploading MP3, WAV, and video files. It can automatically remove background noise and improve voice clarity, making vocals clearer in podcasts, tutorials, courses, songs with vocals, and spoken segments. The website also offers related tools such as AI Podcast Maker, AI Mashup Maker, AI Audio to Text, and AI Audio Translator, and officially states that more than 15,000 users have used it.

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VoiceIndex AI

AI audio

VoiceIndex AI is a free online AI speech synthesis and voiceover platform, offering more than 100 natural voices, supporting multiple languages such as Chinese, English, and Japanese, with online preview and MP3 download. It also provides speech-to-text, subtitle generation, and format conversion features, supports uploading audio and video files such as MP3, WAV, M4A, and MP4, and exports TXT, SRT, and VTT subtitles. It can be tried without registration, supports up to 10,000 characters per synthesis, and the free plan includes a daily quota of 50,000 characters. It is suitable for scenarios such as short video narration, course voiceover, audiobook production, meeting notes, and video subtitles.

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voiceloop

AI audio

voiceloop is a voice agent loop library that runs in the browser, implementing the complete pipeline of VAD → STT → LLM → TTS. It is characterized by zero runtime dependencies and solves the problems of interruption, echo, and self-interruption in real-time voice interaction: true barge-in is triggered based on transcribed new words rather than microphone energy, so the agent's own voice does not interrupt itself; zero self-interruption is achieved without enabling echo cancellation. The first segment of audio can appear within 1 second, and while TTS is reading the first sentence, the LLM is writing the second sentence, and LLM calls are initiated early during user pauses. Turn serialization ensures that rapid successive turns, tool results, holds, and replays do not overlap in speech. Local-first: Silero VAD and Piper TTS run as WASM within the tab, free of charge and without cloud round trips. Supports clicking anywhere in the transcript to jump the speech to that position, either forward or backward. All components are pluggable: any OpenAI-compatible LLM or custom async generator, multiple STT and TTS options. It also provides latency benchmarking scripts that measure the two key metrics of "first token" and "first sound".

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