CapsWriter-Offline is a voice-to-text application for Windows that runs speech recognition entirely offline using models like Paraformer and SenseVoice-Small in ONNX format. Users speak by holding CapsLock or a mouse button, and the transcribed text appears immediately. It supports hot word replacement, regex-based corrections, digital ITN conversion, and integrates LLM roles for text polishing when recognition results match predefined role names. The tool also handles file transcription for audio/video into subtitles, plain text, or timestamped JSON.