Say.Js

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say.js is an open-source Node.js library for text-to-speech functionality, enabling developers to send text from Node.js applications directly to speakers. It supports adjusting speech speed and exporting audio on MacOS and Windows.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Yes

Skill level

Technical

About

What is say.js?

say.js is a Node.js library designed for text-to-speech (TTS) capabilities, allowing developers to integrate voice output into their applications. It provides methods to speak text using the system's default voice or a specified voice, with adjustable speed. The library also supports stopping currently spoken text and exporting spoken audio to WAV files, though the export feature is primarily available on MacOS and Windows. While macOS and Windows offer full functionality, Linux support requires Festival and has limitations, such as the inability to export audio or list available voices. This open-source tool is ideal for developers looking to add basic TTS features to their Node.js projects across different operating systems.

Best used for

Ideal for developers who need to integrate text-to-speech capabilities into their Node.js applications, control speech parameters like speed and voice, and export spoken audio. Especially valuable for projects requiring simple, programmatic voice output across macOS, Windows, and Linux environments.

Common actions

add voice output

convert text to speech

control speech parameters

export audio files

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Capabilities

Key features

Text-to-speech conversion
Adjust speech speed
Stop speech playback
Export audio to WAV
List installed voices
Cross-platform support

Target Audience

developer

Integrations

Not yet documented

Pricing & Plans

Open Source

Free

FAQs

What are the system requirements for say.js?

say.js requires macOS (which comes with 'say'), Windows (with SAPI.SpVoice and Powershell installed), or Linux with Festival installed. Specific features like audio export or voice listing may vary by operating system.

Can I export spoken audio files using say.js?

Yes, you can export spoken audio to WAV files using the `export` method. This feature is fully supported on macOS and Windows. However, the `export` method is not available for Linux users.

How do I specify a voice or speed for the text-to-speech output?

You can specify a voice and speed as parameters in the `speak` method. For example, `say.speak('Hello', 'Alex', 0.5)` would use the 'Alex' voice at half speed. Available voices can be listed on macOS.

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