s3fs

Convenient Filesystem interface over S3

s3fs Permissive license BSD Active ★ 1,046 v2026.7.0 released 2026-07-28

Install

s3fs on PyPI

pip

pip install s3fs

uv

uv add s3fs

poetry

poetry add s3fs

Package facts

License	BSD (permissive)
Python support	supports the current Python release (>=3.10)
Install friction	low — pure-Python wheel
Runtime dependencies	3 — aiobotocore, fsspec, aiohttp
Maintenance	actively maintained — 16 days since the last release
Last repo commit	2026-07-28
First released	2016-03-22
Popularity	one of the 100 most-downloaded packages on PyPI (30-day window, as of 2026-08-13)
Known vulnerabilities	none known (OSV.dev, checked 2026-08-13)

Evidence: s3fs-2026.7.0-py3-none-any.whl

Keywords: s3, boto

Development Status :: 4 - BetaIntended Audience :: DevelopersLicense :: OSI Approved :: BSD LicenseOperating System :: OS IndependentProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14

About s3fs

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

s3fs

|Build Status| |Documentation|

S3FS builds on aiobotocore to provide a convenient Python filesystem interface for S3.

Support

Work on this repository is supported in part by:

"Anaconda, Inc. - Advancing AI through open source."

Read as markdown · JSON record · Source repository · Homepage

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

s3fs provides a Python filesystem interface to Amazon S3, built on aiobotocore, allowing you to read, write, and navigate S3 buckets using familiar file-like operations.

Low friction: pure-Python wheel, three lightweight async-capable dependencies (aiobotocore, fsspec, aiohttp), released 16 days ago with active maintenance—1046 GitHub stars and commits through July 2026.

BSD license (permissive) imposes no significant restrictions; you may use, modify, and distribute s3fs freely in commercial and private projects provided you retain the license notice.

Usage

pip install s3fs
import s3fs
fs = s3fs.S3FileSystem()
with fs.open('s3://bucket/key', 'r') as f:
    data = f.read()

Requires Python 3.10 or later; AWS credentials must be configured (via environment variables, ~/.aws/config, or IAM role).

Verdict: s3fs is a mature, actively maintained top-100 PyPI package with permissive licensing, low install friction, and no known vulnerabilities. It is a solid choice for S3 filesystem access in Python 3.10+.

Needs verification

Whether aiobotocore, fsspec, and aiohttp themselves carry known vulnerabilities or maintenance concerns.
Performance characteristics and concurrency limits under high-throughput S3 workloads.

s3 filesystem interface pythonaws s3 file operationss3 bucket access pythonaiobotocore s3 wrappers3 like filesystemboto3 filesystem abstraction