Decode base64-encoded audio content
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Audio data is binary data. You can read the binary data directly from a gRPC
response; however, JSON is used when responding to a REST request. Because JSON
is a text format that does not directly support binary data,
Text-to-Speech returns a response string encoded in
Base64. You must convert the base64-encoded
text data from the response to binary before you can play it on a device.
JSON responses from the Text-to-Speech include base64-encoded audio
content in the audioContent field. For example:
{
"audioContent": "//NExAARqoIIAAhEuWAAAGNmBGMY4EBcxvABAXBPmPIAF//yAuh9Tn5CEap3/o..."
}
To decode base64 into an audio file:
Linux
Copy only the base-64 encoded content into a text file.
Decode the source text file using the base64 command line tool
by using the -d flag:
$ base64 SOURCE_BASE64_TEXT_FILE -d > DESTINATION_AUDIO_FILE
Mac OSX
Copy only the base-64 encoded content into a text file.
Decode the source text file using the base64 command line tool:
$ base64 --decode -i SOURCE_BASE64_TEXT_FILE > DESTINATION_AUDIO_FILE
Windows
Copy only the base-64 encoded content into a text file.
Decode the source text file using the
certutil command.
certutil -decode SOURCE_BASE64_TEXT_FILE DESTINATION_AUDIO_FILE
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Last updated 2025-08-28 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[],[],null,["# Decode base64-encoded audio content\n\nAudio data is binary data. You can read the binary data directly from a gRPC\nresponse; however, JSON is used when responding to a REST request. Because JSON\nis a text format that does not directly support binary data,\nText-to-Speech returns a response string encoded in\n[Base64](https://en.wikipedia.org/wiki/Base64). You must convert the base64-encoded\ntext data from the response to binary before you can play it on a device.\n\nJSON responses from the Text-to-Speech include base64-encoded audio\ncontent in the `audioContent` field. For example: \n\n```json\n{\n \"audioContent\": \"//NExAARqoIIAAhEuWAAAGNmBGMY4EBcxvABAXBPmPIAF//yAuh9Tn5CEap3/o...\"\n}\n```\n\nTo decode base64 into an audio file: \n\n### Linux\n\n1. Copy only the base-64 encoded content into a text file.\n\n2. Decode the source text file using the base64 command line tool\n by using the `-d` flag:\n\n```bash\n $ base64 SOURCE_BASE64_TEXT_FILE -d \u003e DESTINATION_AUDIO_FILE\n```\n\n### Mac OSX\n\n1. Copy only the base-64 encoded content into a text file.\n\n2. Decode the source text file using the base64 command line tool:\n\n```bash\n $ base64 --decode -i SOURCE_BASE64_TEXT_FILE \u003e DESTINATION_AUDIO_FILE\n```\n\n### Windows\n\n1. Copy only the base-64 encoded content into a text file.\n\n2. Decode the source text file using the\n [`certutil`](https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/certutil) command.\n\n```bash\n certutil -decode SOURCE_BASE64_TEXT_FILE DESTINATION_AUDIO_FILE\n```"]]
