Piper

github.com/OHF-Voice/piper1-gpl Linux & Mac Apps Open-source projectOpen source

Piper converts text to speech locally with a neural speech engine, according to its repository description.

github.com/OHF-Voice/piper1-gpl
Piper homepage screenshot

About Piper

Piper is a text-to-speech engine that converts text into spoken audio using a neural speech model. The repository describes it as fast and local, and it embeds espeak-ng for phonemization, the step that turns text into speech sounds. It is installed with pip install piper-tts.

The repository lists several ways to use it: a command-line interface, a web server, a Python API, and a C/C++ API. It also includes documentation for training new voices and for building the software manually. Bindings for Java (Piper JNI) are listed for use from other programming languages. The page lists projects that use Piper, including Home Assistant and NVDA. The source is licensed under GPL-3.0. The Open Home Foundation states it is looking for maintainers for the project. Supported operating systems are not listed on the page.

Key features

  • Neural text-to-speech engine described as running locally
  • Embeds espeak-ng for phonemization
  • Command-line interface
  • Web server mode
  • Python API and C/C++ API
  • Java bindings through Piper JNI
Best for: Developers who want local neural speech output in Python, C/C++, Java, or command-line tools.
Good for
  • Described as a local engine, so the page does not describe text being sent to an external service
  • Open source under the GPL-3.0 license
  • Offers several interfaces: command line, web server, Python, C/C++, and Java bindings
Watch out for
  • The Open Home Foundation is looking for maintainers for the project
  • Supported operating systems are not listed on the repository page

Piper at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Open source
Yes · Source code
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026

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Piper FAQ

How do I install Piper?
The repository says to install it with pip install piper-tts.
What license does Piper use?
The repository lists the GPL-3.0 license.
Can Piper be used from languages other than Python?
The page lists a C/C++ API and Java bindings through Piper JNI, in addition to the Python API.
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