ua-parser-builtins

Precompiled rules for User Agent Parser

ua-parser-builtins Permissive license Apache 2.0 Active ★ 648 v202606 released 2026-06-01

Install

ua-parser-builtins on PyPI

pip

pip install ua-parser-builtins

uv

uv add ua-parser-builtins

poetry

poetry add ua-parser-builtins

Package facts

License	Apache 2.0 (permissive)
Python support	supports the current Python release (>=3.10)
Install friction	low — pure-Python wheel
Runtime dependencies	none
Maintenance	actively maintained — 73 days since the last release
Last repo commit	2026-05-27
First released	2024-11-26
Popularity	one of the top 1,000 most-downloaded packages on PyPI (30-day window, as of 2026-08-13)
Known vulnerabilities	none known (OSV.dev, checked 2026-08-13)

Evidence: ua_parser_builtins-202606-py3-none-any.whl

Development Status :: 4 - BetaEnvironment :: Web EnvironmentIntended Audience :: DevelopersLicense :: OSI Approved :: Apache Software LicenseOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: Implementation :: CPythonProgramming Language :: Python :: Implementation :: GraalPyProgramming Language :: Python :: Implementation :: PyPyTopic :: Internet :: WWW/HTTPTopic :: Software Development :: Libraries :: Python Modules

About ua-parser-builtins

from the package's own PyPI description — quoted content, verbatim

Precompiled ruleset for ua-parser

This project does not do anything on its own, nor does it have any actual API: it contains the dataset of uap-core pre-compiled for use by ua-parser to decrease initialisation times.

The precompiled ruleset is released monthly based on whatever uap-core's default branch is at that moment. The uap-core commit used for creating the compiled ruleset is stored in the REVISION file at the root of the wheel.

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AI interpretation — verify before relying

AI-generated interpretation of the package facts above; every digit, version, license, or vulnerability id it cites is grounded in the facts already shown on this page

Provides precompiled user-agent parsing rules to decrease initialization times when used with ua-parser.

Low friction installation as a pure wheel with no runtime dependencies. Active maintenance with monthly releases tracking upstream uap-core changes.

Apache 2.0 permissive license allows commercial and private use with minimal restrictions.

Usage

pip install ua-parser-builtins
# Contains precompiled ruleset from uap-core for use by ua-parser

Requires Python 3.10 or later; intended as a companion dataset, not standalone.

Verdict: A lightweight, actively maintained data package released monthly that accelerates ua-parser initialization. No vulnerabilities, permissive Apache 2.0 license, and broad Python version support (3.10–3.14) make it a low-risk dependency.

Needs verification

Whether ua-parser automatically detects and uses this package when installed, or if explicit configuration is required.
Performance improvement magnitude compared to runtime ruleset compilation in typical applications.
How the monthly release cycle aligns with uap-core updates and whether users need to manually update.

user agent parsing rulesua-parser precompiled datauser agent detectionbrowser detection libraryhttp user agent parsingprecompiled ruleset