certifi

Certifi provides Mozilla’s carefully curated collection of Root Certificates for validating the trustworthiness of SSL certificates while verifying the identity of TLS hosts. It has been extracted from the Requests project.

Installation

certifi is available on PyPI. Simply install it with pip:

$ pip install certifi

Usage

To reference the installed certificate authority (CA) bundle, you can use the built-in function:

>>> import certifi

>>> certifi.where()
'/usr/local/lib/python3.7/site-packages/certifi/cacert.pem'

Or from the command line:

$ python -m certifi
/usr/local/lib/python3.7/site-packages/certifi/cacert.pem

Enjoy!

Addition/Removal of Certificates

Certifi does not support any addition/removal or other modification of the CA trust store content. This project is intended to provide a reliable and highly portable root of trust to python deployments. Look to upstream projects for methods to use alternate trust.

Release files for certifi 2026.7.22

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for certifi 2026.7.22
File	Size	Uploaded
certifi-2026.7.22.tar.gz	138.1 kB	Jul 22, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for certifi 2026.7.22
File	Interpreter	ABI	Platform	Reset
certifi-2026.7.22-py3-none-any.whl 137.0 kB Jul 22, 2026	Python 3	none	any	Details

Total release size: 275.1 kB

Release files / certifi-2026.7.22.tar.gz

Download URL	certifi-2026.7.22.tar.gz
Size	138.1 kB
Tags	Source
SHA-256 checksum How to use checksums	`741e2c3b351ddf169a738da9f2c048608ff7f2c5cc02f1ebc6b118bb090d5d55`
BLAKE2b-256 checksum How to use checksums	`a3c224167ea9858356b47a87a50d39908bfdb72ceeefe0041586e704e5376b3a`
Upload date	Jul 22, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/certifi/python-certifi
Publishing commit: github.com/certifi/python-certifi/tree/f4bc676bc101fe2235846e37044e8c693d6cbaf4

Workflow

Publishing configuration: github.com/certifi/python-certifi/blob/f4bc676bc101fe2235846e37044e8c693d6cbaf4/.github/workflows/release.yml
Publishing logs: github.com/certifi/python-certifi/actions/runs/29888764268/attempts/1

Artifact

Subject: certifi-2026.7.22.tar.gz
SHA-256 checksum: 741e2c3b351ddf169a738da9f2c048608ff7f2c5cc02f1ebc6b118bb090d5d55 Verifying attestations

Release files / certifi-2026.7.22-py3-none-any.whl

Download URL	certifi-2026.7.22-py3-none-any.whl
Size	137.0 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`62f22742b58a1a33014a2b6b706588a8d7e2a88ae7bd1a6ebe8c992928483775`
BLAKE2b-256 checksum How to use checksums	`0ba771ac2cff56fec219ed242bb11b8efb69fcc4bec75db06fb7bfe35de520e6`
Upload date	Jul 22, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/certifi/python-certifi
Publishing commit: github.com/certifi/python-certifi/tree/f4bc676bc101fe2235846e37044e8c693d6cbaf4

Workflow

Publishing configuration: github.com/certifi/python-certifi/blob/f4bc676bc101fe2235846e37044e8c693d6cbaf4/.github/workflows/release.yml
Publishing logs: github.com/certifi/python-certifi/actions/runs/29888764268/attempts/1

Artifact

Subject: certifi-2026.7.22-py3-none-any.whl
SHA-256 checksum: 62f22742b58a1a33014a2b6b706588a8d7e2a88ae7bd1a6ebe8c992928483775 Verifying attestations