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pip-tools
What it is
pip-tools is a free pair of command-line tools for managing pinned pip-based packages and making builds more predictable: pip-compile and pip-sync. pip-compile creates requirements.txt files from pyproject.toml, setup.cfg, setup.py or requirements.in. It also supports project and optional dependencies declared in pyproject.toml, and can generate hashes for pip hash-checking mode. pip-sync installs, upgrades or uninstalls packages so a virtual environment matches a compiled requirements.txt file. Project defaults can be set in .pip-tools.toml or pyproject.toml, and pip-compile can be used as a pre-commit hook. The tools support Linux, macOS and Windows, and the package requires Python 3.9 or later. One limitation is that compilation can produce different results across operating systems, Python versions and implementations, so users targeting multiple environments should compile separately for each. The backtracking resolver is the default; the legacy resolver is deprecated. pip-tools is distributed under the BSD License and is classified for developers and system administrators.
For and against
For
- Compiles requirements from common project configuration files.
- Synchronizes virtual environments to compiled requirements.
- Can generate hashes for pip hash-checking mode.
- Supports Linux, macOS and Windows.
- Free and distributed under the BSD License.
Against
- Requires Python 3.9 or later.
- Compilation can differ across target environments.
- Legacy resolver is deprecated.
- It does not provide environment management.
The verdict
pip-tools offers a focused workflow for compiling pinned requirements and aligning virtual environments with them. Cross-environment differences mean teams should compile separately for each target, and the package requires Python 3.9 or later.
Who it suits
It is for developers and system administrators who want to compile pinned pip requirements and synchronize virtual environments. It is relevant for projects targeting multiple operating systems or Python environments, provided requirements are compiled for each target.
Plans and prices
pip-tools
command-line tools · install per virtual environment · Python >=3.9
Read 1 Oct 2026 · pip-tools.readthedocs.io
On the record
- Audience
- PyPI classifies the project for developers and system administrators.pypi.org · read 1 Oct 2026
- Configuration
- Project-level defaults can be configured in .pip-tools.toml or pyproject.toml.pip-tools.readthedocs.io · read 1 Oct 2026
- Core commands
- The project consists of pip-compile and pip-sync.pip-tools.readthedocs.io · read 1 Oct 2026
- Cross-environment limit
- Because dependencies can vary by operating system, Python version, and implementation, users should run pip-compile separately for each targeted environment.pip-tools.readthedocs.io · read 1 Oct 2026
- Dependency compilation
- pip-compile creates requirements.txt files from pyproject.toml, setup.cfg, setup.py, or requirements.in.pip-tools.readthedocs.io · read 1 Oct 2026
- Environment synchronization
- pip-sync installs, upgrades, and uninstalls packages so a virtual environment matches compiled requirements exactly.pip-tools.readthedocs.io · read 1 Oct 2026
- Hash security
- pip-compile can generate hashes for pip hash-checking mode with the --generate-hashes flag.pip-tools.readthedocs.io · read 1 Oct 2026
- License
- pip-tools is distributed under the BSD 3-Clause License.github.com · read 1 Oct 2026
- Maintainer model
- Jazzband is a collaborative community that shares responsibility for maintaining Python-based projects.github.com · read 1 Oct 2026
- Packaging integrations
- The documentation describes use with Setuptools, Hatch, and flit projects.pip-tools.readthedocs.io · read 1 Oct 2026
- Pre-commit integration
- pip-compile can be used as a pre-commit hook.pip-tools.readthedocs.io · read 1 Oct 2026
- Purpose
- pip-tools is a set of command-line tools that keeps pinned pip-based packages fresh and helps make builds predictable and deterministic.pip-tools.readthedocs.io · read 1 Oct 2026
- Pyproject support
- pip-compile supports project dependencies and optional dependencies declared in pyproject.toml.pip-tools.readthedocs.io · read 1 Oct 2026
- Release provenance
- PyPI says the release was uploaded using Trusted Publishing and has a GitHub Actions signature and attestation.pypi.org · read 1 Oct 2026
- Reproducibility limit
- pip-compile can produce different requirements.txt results for different operating systems, Python versions, and Python implementations.pip-tools.readthedocs.io · read 1 Oct 2026
- Requirement compilation
- pip-compile generates requirements.txt from pyproject.toml, setup.cfg, setup.py, or requirements.in.pip-tools.readthedocs.io · read 1 Oct 2026
- Resolver behavior
- The backtracking resolver is the default and is more robust, while the legacy resolver is deprecated and may take less predictable paths.pip-tools.readthedocs.io · read 1 Oct 2026
- Resolver limit
- The legacy resolver is deprecated, while the backtracking resolver is the default and is described as more robust but generally slower.github.com · read 1 Oct 2026
