python-stdnum
Python module to handle standardized numbers and codes
Decision gist · record as of 2026-08-14
Yes. The package is production-stable, actively maintained, has no dependencies, and solves a real problem for any application handling international identifiers or financial codes. The copyleft license is standard for this type of utility and poses no barrier for most commercial use. Install it if you validate or reformat standardized numbers.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Low friction: pure Python wheel with no runtime dependencies.
- Actively maintained with recent release and steady commit activity.
- Supports Python 3.8 through 3.14 and PyPy.
License · maintenance · safety
LGPL (copyleft) — Licensed under LGPL (copyleft); you may use it freely but must disclose modifications and license derivative works under LGPL if distributed.
last release 2026-01-04 (222 days) · last repo commit 2026-08-14 · 588 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 6,192,662 downloads/mo, #1,961 on PyPI
Alternatives
Verify before relying
pip install python-stdnum
from stdnum.es import nif
if nif.is_valid('ABC'):
print(nif.format('ABC'))- Whether validation rules are kept current with real-world regulatory changes across all supported jurisdictions.
- Performance characteristics when validating large batches of numbers.
- Exact count of supported country formats and number types.
What it is and what it does
python-stdnum is a validation and formatting library for standardized identification and financial numbers used across the world. It handles tax IDs, VAT numbers, bank account identifiers, national identity codes, and other regulated number formats from many countries and regions. The library provides functions to check whether a number is valid according to its format's checksum or structural rules, and to reformat numbers into canonical or display-friendly forms.
The package is designed for developers in finance, insurance, telecommunications, and government sectors who need to validate user input or process international identifiers. It has no external dependencies, installs quickly, and works across modern Python versions. Typical use cases include validating customer tax IDs before submission to authorities, checking IBAN correctness in payment systems, or normalizing identity numbers for database storage.
Use it for
- Validate a customer's tax ID or VAT number before submitting to a government agency or payment processor.
- Normalize and reformat bank account numbers for consistent storage or display in financial applications.
- Check the structural validity of national identity card numbers during user registration or KYC workflows.
- Parse and validate international business registration numbers in multi-country accounting systems.
- Verify financial security identifiers in trading or portfolio management tools.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
The package is production-stable, actively maintained, has no dependencies, and solves a real problem for any application handling international identifiers or financial codes. The copyleft license is standard for this type of utility and poses no barrier for most commercial use. Install it if you validate or reformat standardized numbers.
Install
python-stdnum on PyPI
Before you install
Low friction: pure Python wheel with no runtime dependencies. Actively maintained with recent release and steady commit activity. Supports Python 3.8 through 3.14 and PyPy.
License in practice
Licensed under LGPL (copyleft); you may use it freely but must disclose modifications and license derivative works under LGPL if distributed.
Quickstart
pip install python-stdnum
from stdnum.es import nif
if nif.is_valid('ABC'):
print(nif.format('ABC'))Verify before relying
- Whether validation rules are kept current with real-world regulatory changes across all supported jurisdictions.
- Performance characteristics when validating large batches of numbers.
- Exact count of supported country formats and number types.
Package facts
| License | LGPL copyleft |
| Python support | Supports the current Python release >=3.8 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 222 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 6,192,662 / month, #1,961 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersIntended Audience :: Financial and Insurance IndustryIntended Audience :: Information TechnologyIntended Audience :: Telecommunications IndustryLicense :: OSI Approved :: GNU Lesser General Public License v2 or later (LGPLv2+)Operating 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 :: 3.8Programming Language :: Python :: 3.9Programming Language :: Python :: Implementation :: PyPyTopic :: Office/Business :: FinancialTopic :: Software Development :: Libraries :: Python ModulesTopic :: Text Processing :: General |
Evidence: python_stdnum-2.2-py3-none-any.whl
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