certifi
PyPIv2026.7.22Python package for providing Mozilla's CA Bundle.
Safe to adopt
Yes — certifi scores well across adoption, maintenance, weight, supply chain, and licensing. No download data reported for this package yet. Last published 50 days ago. 15 releases in the last 2 years.
- ?Adoption: grade ?, Not reported by this registry.
No download data reported for this package yet.
- AMaintenance: grade A, Excellent.
Last published 50 days ago. 15 releases in the last 2 years.
- AWeight: grade A, Excellent.
Zero runtime dependencies, about 134 KB installed.
- BSupply chain: grade B, Good.
This package has a single maintainer (bus factor of 1).
- ALicense: grade A, Excellent.
MPL-2.0 — permissive, with no copyleft found in the dependency tree.
Grades are computed deterministically from registry metadata collected by PackageGraph — downloads, dependents, publish dates, the resolved dependency tree, maintainer count, and declared licenses. No third-party scores are used.
Install cost
What you actually take on by adding certifi to a project.
Runtime packages this one declares itself.
Distinct packages in the full runtime tree, deduplicated the way a package manager would.
Unpacked size of this package plus its entire runtime tree.
Longest resolved dependency chain below this package.
Compatibility
- Python
- python >=3.7
Used by
Popular packages that depend on certifi.
Relationship graph
Dependencies (left) and dependents (right) of certifi.
Frequently installed together
Internationalized Domain Names in Applications (IDNA)
HTTP library with thread-safe connection pooling, file post, and more.
A pure-Python, bring-your-own-I/O implementation of HTTP/1.1
High-level concurrency and networking framework on top of asyncio or Trio
A minimal low-level HTTP client.
Release history
15 releases in the last two years, typically about 50 days apart.
| Version | Published | Size | License |
|---|---|---|---|
| 2026.7.22latest | 1 month ago | 134 KB | MPL-2.0 |
| 2026.6.17 | 2 months ago | 130 KB | MPL-2.0 |
| 2026.5.20 | 3 months ago | 131 KB | MPL-2.0 |
| 2026.4.22 | 4 months ago | 133 KB | MPL-2.0 |
| 2026.2.25 | 6 months ago | 150 KB | MPL-2.0 |
| 2026.1.4 | 8 months ago | 149 KB | MPL-2.0 |
| 2025.11.12 | 10 months ago | 156 KB | MPL-2.0 |
| 2025.10.5 | 11 months ago | 159 KB | MPL-2.0 |
| 2025.8.3 | 1 year ago | 157 KB | MPL-2.0 |
| 2025.7.14 | 1 year ago | 159 KB | MPL-2.0 |
| 2025.7.9 | 1 year ago | 155 KB | MPL-2.0 |
| 2025.6.15 | 1 year ago | 154 KB | MPL-2.0 |
| 2025.4.26 | 1 year ago | 156 KB | MPL-2.0 |
| 2025.1.31 | 1 year ago | 162 KB | MPL-2.0 |
| 2024.12.14 | 1 year ago | 161 KB | MPL-2.0 |
Overview
certifi is an PyPI package that python package for providing Mozilla's CA Bundle. It has 3 known dependents in the graph. The latest version is 2026.7.22, released under the MPL-2.0 license.
Who should use it
Teams working in the PyPI ecosystem who need python package for providing Mozilla's CA Bundle and value a focused solution.
When not to use it
Consider an alternative if you need to or if a more actively-maintained option better fits your PyPI stack.
Pros
- Clear open-source license (MPL-2.0).
- Zero runtime dependencies — minimal footprint.
Cons
- No significant drawbacks detected from available metadata.
Auto-generated from collected registry metadata. No external claims are inferred.
Maintainers
Frequently asked questions
Should I use certifi?
Yes — certifi scores well across adoption, maintenance, weight, supply chain, and licensing. No download data reported for this package yet. Last published 50 days ago. 15 releases in the last 2 years.
How do I install certifi?
Run `pip install certifi` to add certifi to your PyPI project.
What license is certifi released under?
certifi is distributed under the MPL-2.0 license.
How popular is certifi?
PyPI does not publish download counts. Within PackageGraph's crawl, 3 known packages depend on certifi.
Is certifi still maintained?
The most recent release of certifi (v2026.7.22) was published 1 month ago.