Applio

Applio is an open-source, free AI voice conversion toolkit that supports both desktop and cloud-based operation. It can be used for creating AI cover songs, training custom voice models, and performing real-time voice conversion. The project is licensed under the MIT License, compatible with Windows, macOS, and Linux systems, and requires no account registration, has no paywalls, and collects no telemetry data; its code is fully open and auditable.

Applio is a complete open-source AI voice conversion suite that supports AI cover song creation, custom voice model training, and real-time voice conversion—either locally on your desktop or in the cloud. It provides a full end-to-end toolchain, from audio preprocessing and model training to voice blending and text-to-speech, and is available to creators, researchers, and commercial users. All features are free and can be freely modified and distributed.

Features

Voice Conversion: Use pre-built voice models to convert any audio into a specified voice, with support for pitch adjustment, audio noise reduction, sample rate enhancement, and batch file processing.

Real-Time Voice Conversion: Achieve low-latency inference to enable real-time voice modulation from microphone input, suitable for live streaming, voice calls, and singing applications.

Use cases

Create AI cover songs by using pre-built voice models to convert any audio into a specified voice.

Real-time voice transformation for live streaming, voice calls, or karaoke scenarios, with low-latency inference ensuring a smooth experience.

Train a custom voice model to generate highly personalized voices based on your own audio dataset.

How to use

Download the Applio desktop application, or choose the classic Gradio web UI.

Select a community-shared voice model, or train a custom voice using your own audio dataset.

Import an audio file to be processed, microphone input, or text content.

Perform voice conversion, real-time voice modulation, or TTS synthesis, with support for pitch adjustment, audio enhancement, and batch processing.

Pricing

Completely free—no subscription fees, no usage limits, and no hidden charges; open-source with no licensing fees.

Traffic data

Third-party estimates, not first-party analytics. Periods, devices and providers are shown separately.

No verifiable traffic data available

Sources

applio.org ↗