Twine

Free plan LinuxMacWindows

What Twine is

Twine is a free tool for publishing Python packages to PyPI, TestPyPI, and other configured repositories, including private registries. It uploads source and binary distribution files that have already been built, without requiring it to run setup.py during upload. Twine accepts packaging formats including wheels, and its check command checks whether a distribution’s long description will render correctly on PyPI. It authenticates to PyPI over HTTPS using a verified connection, and can sign files with GPG or upload files signed beforehand. Repository settings can come from a .pypirc file, command-line options, or environment variables, which can be useful on CI or build servers. Twine can store repository credentials with keyring; headless Linux systems may need extra setup to store secrets securely. It supports macOS, Windows, and POSIX/Linux, requires Python 3.10 or later, and is licensed under Apache-2.0. It does not provide lockfile support, environment management, or dependency groups.

Who it suits

Twine suits developers who need to upload already-built Python package distributions to public or private repositories. It can also fit CI or build-server workflows that use environment-variable configuration.

What it does well

Uploads source and binary distributions
Supports wheels and other packaging formats
Authenticates to PyPI over verified HTTPS
Can sign files with GPG

What to know first

Requires Python 3.10 or later
Headless Linux may need extra keyring setup
No lockfile support or environment management
No dependency groups

Limits

Twine's free plan has no listed usage quota. Its keyring credential storage may need extra setup on headless Linux systems; the package also requires Python 3.10 or later.

Plans

Plan	Billed and limits	Price
Twine	Apache-2.0 · Python >=3.10	Free

As twine.readthedocs.io lists them, read 8 Oct 2026. The maker's own page has the final word.

Getting started

Visit the Twine documentation website.
Use a system running Linux, macOS, or Windows with Python 3.10 or later.
Build the source or binary distribution files you want to publish.
Set repository details with a `.pypirc` file, command-line options, or environment variables.
Upload the built files to PyPI, TestPyPI, or another configured repository.

Verdict

Twine focuses on package publishing rather than building or managing environments. Its ability to upload pre-built files and configure repositories through environment variables may suit release and CI workflows.

Questions

How much does Twine cost?

Twine is free. Its plan is listed as free.

Which repositories can Twine publish to?

It can upload to PyPI, TestPyPI, and other configured repositories, including private registries.

Which operating systems does Twine support?

The listed platforms are Linux, macOS, and Windows.

Does Twine build packages during upload?

No. It uploads distribution files that have already been built and does not need to run setup.py during upload.

What license does Twine use?

Twine is licensed under Apache-2.0.

What Python version does Twine require?

It requires Python 3.10 or later.

Facts from Twine's own pages

Automation: The documentation notes that environment-variable configuration can be useful on CI or build servers. · twine.readthedocs.io, 7 Oct 2026
Build independence: Twine uploads already-built distribution files without requiring it to run setup.py. · twine.readthedocs.io, 7 Oct 2026
Build workflow: Twine uploads files that have already been created, so distributions can be tested before release without executing setup.py during upload. · twine.readthedocs.io, 8 Oct 2026
Configuration: Repository settings can be supplied through a .pypirc file, command-line options, or environment variables. · twine.readthedocs.io, 8 Oct 2026
Credential storage: Twine supports storing repository usernames and passwords securely using keyring. · twine.readthedocs.io, 8 Oct 2026
Distribution checks: The twine check command checks whether a distribution’s long description will render correctly on PyPI. · twine.readthedocs.io, 7 Oct 2026
File signing: Twine supports signing uploads with GPG and can upload pre-signed .asc files. · twine.readthedocs.io, 8 Oct 2026
Intended users: PyPI classifies Twine’s intended audience as developers. · pypi.org, 8 Oct 2026
Keyring limitation: The documentation says keyring may require additional setup on some systems, especially Linux headless environments. · twine.readthedocs.io, 8 Oct 2026
License: The package is licensed under Apache-2.0. · pypi.org, 8 Oct 2026
Package checks: The twine check command checks whether a distribution’s long description will render correctly on PyPI. · twine.readthedocs.io, 8 Oct 2026
Package formats: Twine supports any packaging format, including wheels. · twine.readthedocs.io, 7 Oct 2026
Package uploads: It uploads source and binary distribution files independently of the build system. · twine.readthedocs.io, 8 Oct 2026
Purpose: Twine is a utility for publishing Python packages to PyPI and other repositories. · twine.readthedocs.io, 8 Oct 2026
Repositories: Twine documentation shows uploading to PyPI, Test PyPI, and other package indexes configured by repository name or URL. · twine.readthedocs.io, 8 Oct 2026
Runtime requirement: The package requires Python 3.10 or later. · pypi.org, 8 Oct 2026
Secure connection: Twine authenticates to PyPI over HTTPS using a verified connection. · twine.readthedocs.io, 8 Oct 2026
Security: The documentation says Twine authenticates to PyPI over HTTPS using a verified connection. · twine.readthedocs.io, 7 Oct 2026
Signing: Twine supports signing files with GPG and uploading files that were signed in advance. · twine.readthedocs.io, 7 Oct 2026
Supported formats: Twine supports uploading any packaging format, including wheels. · twine.readthedocs.io, 8 Oct 2026
Supported operating systems: The PyPI project page lists macOS, Windows, and POSIX/Linux among its operating-system classifiers. · pypi.org, 7 Oct 2026

Where Twine stands on Freedom251

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