WhisperUI is a voice-processing platform based on OpenAI technology, primarily offering speech-to-text and text-to-speech services, with both web-based online services and a desktop application.
The Web platform offers basic features for free, but using OpenAI's transcription or synthesis services typically requires you to provide and pay for your OpenAI API key. Additionally, there are subscription plans that include enhanced features and desktop usage.
The desktop version runs entirely offline on Windows and macOS, with audio data processed locally and not uploaded to the cloud, offering privacy-conscious users a choice; processing speed depends on your local hardware.
Supports uploading a wide range of common audio and video formats including MP3, MP4, WAV, M4A, OGG, WEBM for speech-to-text processing.
Its speech-to-text uses OpenAI's Whisper model, trained on large multilingual datasets; it offers high accuracy for languages like English and can handle various accents and background noise. Real-world results depend on audio quality, language, and accent.
In local processing mode on the desktop application, audio data is processed on your device and is not uploaded to external servers. In online service mode, users are responsible for managing their OpenAI API keys.
Ideal for video creators, content producers, researchers, students, developers, and anyone who frequently needs audio transcription, subtitle generation, or text-to-speech.
Powered by OpenAI's TTS model, offers multiple voice styles (e.g., Alloy, Echo) and two model options (TTS-1 and TTS-1-HD); output formats include MP3, AAC, and FLAC.

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