Offline CTC models

This section lists available offline CTC models.

• icefall
  • Zipformer CTC models
    • sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03 (Chinese)
      • Pre-built Android APK
      • WebAssembly example (ASR from a microphone)
      • Huggingface space (Decode a file)
      • Download the model
      • Decode wave files
      • Speech recognition from a microphone
      • Speech recognition from a microphone with VAD
• NeMo CTC-based models
  • How to export models from NeMo to sherpa-onnx
    • Step 1: Export model.onnx
    • Step 2: Add metadata
    • Step 3: Obtain model.int8.onnx
    • Step 4: Obtain tokens.txt
  • English
    • sherpa-onnx-nemo-parakeet_tdt_ctc_110m-en-36000-int8 (English, 英语)
      • Download the model
      • Decode wave files
      • Speech recognition from a microphone
      • Speech recognition from a microphone with VAD
    • stt_en_citrinet_512
      • Download the model
      • Decode wave files
    • stt_en_conformer_ctc_small
      • Download the model
      • Decode wave files
    • stt_en_conformer_ctc_medium
      • Download the model
      • Decode wave files
    • stt_en_conformer_ctc_large
      • Download the model
      • Decode wave files
  • Russian
    • sherpa-onnx-nemo-ctc-giga-am-v2-russian-2025-04-19
      • Download the model
      • Decode wave files
      • Speech recognition from a microphone
      • Speech recognition from a microphone with VAD
    • sherpa-onnx-nemo-ctc-giga-am-russian-2024-10-24
      • Download the model
      • Decode wave files
      • Speech recognition from a microphone
      • Speech recognition from a microphone with VAD
  • Japanese
    • sherpa-onnx-nemo-parakeet-tdt_ctc-0.6b-ja-35000-int8 (Japanese, 日语)
      • Download the model
      • Decode wave files
      • Speech recognition from a microphone
      • Speech recognition from a microphone with VAD
• yesno
  • Decode wave files