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    Cloud Speech: Node.js Client

    release level npm version

    Cloud Speech Client Library for Node.js

    A comprehensive list of changes in each version may be found in the CHANGELOG.

    Read more about the client libraries for Cloud APIs, including the older Google APIs Client Libraries, in Client Libraries Explained.

    Table of contents:


    Before you begin

    1. Select or create a Cloud Platform project.
    2. Enable the Cloud Speech API.
    3. Set up authentication with a service account so you can access the API from your local workstation.

    Installing the client library

    npm install @google-cloud/speech

    Using the client library

    // Imports the Google Cloud client library
    const speech = require('@google-cloud/speech');
    // Creates a client
    const client = new speech.SpeechClient();
    async function quickstart() {
      // The path to the remote LINEAR16 file
      const gcsUri = 'gs://cloud-samples-data/speech/brooklyn_bridge.raw';
      // The audio file's encoding, sample rate in hertz, and BCP-47 language code
      const audio = {
        uri: gcsUri,
      const config = {
        encoding: 'LINEAR16',
        sampleRateHertz: 16000,
        languageCode: 'en-US',
      const request = {
        audio: audio,
        config: config,
      // Detects speech in the audio file
      const [response] = await client.recognize(request);
      const transcription = response.results
        .map(result => result.alternatives[0].transcript)
      console.log(`Transcription: ${transcription}`);


    Samples are in the samples/ directory. Each sample's has instructions for running its sample.

    Sample Source Code Try it
    Microphone stream source code Open in Cloud Shell
    Beta Features source code Open in Cloud Shell
    Export-to-storage.v1p1beta1 source code Open in Cloud Shell
    Infinite Streaming source code Open in Cloud Shell
    Model Adaptation source code Open in Cloud Shell
    Multi Region source code Open in Cloud Shell
    Profanity Filter source code Open in Cloud Shell
    Quickstart source code Open in Cloud Shell
    Recognize source code Open in Cloud Shell
    Recognize speech with metadata source code Open in Cloud Shell
    Transcribe Context Classes source code Open in Cloud Shell

    The Cloud Speech Node.js Client API Reference documentation also contains samples.

    Supported Node.js Versions

    Our client libraries follow the Node.js release schedule. Libraries are compatible with all current active and maintenance versions of Node.js. If you are using an end-of-life version of Node.js, we recommend that you update as soon as possible to an actively supported LTS version.

    Google's client libraries support legacy versions of Node.js runtimes on a best-efforts basis with the following warnings:

    • Legacy versions are not tested in continuous integration.
    • Some security patches and features cannot be backported.
    • Dependencies cannot be kept up-to-date.

    Client libraries targeting some end-of-life versions of Node.js are available, and can be installed through npm dist-tags. The dist-tags follow the naming convention legacy-(version). For example, npm install @google-cloud/speech@legacy-8 installs client libraries for versions compatible with Node.js 8.


    This library follows Semantic Versioning.

    This library is considered to be stable. The code surface will not change in backwards-incompatible ways unless absolutely necessary (e.g. because of critical security issues) or with an extensive deprecation period. Issues and requests against stable libraries are addressed with the highest priority.

    More Information: Google Cloud Platform Launch Stages


    Contributions welcome! See the Contributing Guide.

    Please note that this, the samples/, and a variety of configuration files in this repository (including .nycrc and tsconfig.json) are generated from a central template. To edit one of these files, make an edit to its templates in directory.


    Apache Version 2.0



    npm i @google-cloud/speech

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