PyRank
zarr-developers

numcodecs

A Python package providing buffer compression and transformation codecs for use in data storage and communication applications.
PyPI GitHub
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

numcodecs has 6.9M monthly downloads and 148 GitHub stars. Version 0.16.5 supports Python 3.11+, first published in 2016.

It is actively maintained under a permissive license, last released in Nov 2025.

It is built on top of numpy and typing-extensions. It is used by 221 tracked packages, including zarr, kerchunk and dandi.

Downloads
Day
262.1K
Week
1.6M
Month
6.9M
Stars
148
Forks
112
Issues
95
Version
0.16.5

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
90
Popularity
50
Adoption
70
Community
90
Provenance
0
How the maintenance status was determined
Last commit
17 days ago
Monthly downloads
6,929,276
• Active
Activity within 30 days
Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
6,929,276
Stars
148
Stars per 1k downloads
0.02
Industry Standard
> 10,000,000 monthly downloads
• Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
228,578
Month daily avg
230,976
Momentum
-1.0%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
>=3.11
Cutting Edge
Minimum supported version is 3.12 or newer
• Modern
Minimum supported version is 3.9, 3.10, or 3.11
Legacy
Supports 3.8 or older (or Python 2)
Unknown
No requires_python specified or unparseable
License categories
License
MIT
• Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
227 days ago
Total releases
51
Releases/year
5.2
Rapid
Last release within 365 days and > 12 releases/year
• Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
68
Monthly downloads
6,929,276
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
• Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
80
 
Issue Burden
641.9
per 1k stars
Discussions
6.8
per 1k stars
Fork Ratio
60.7%
contrib / forks
Stale Release
210d
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

Not all downloads include detailed metadata. Breakdowns reflect the subset that does.

Downloads by OS

Linux 169.1K
macOS 3.8K
Windows 2.9K

Python Versions

3.13
44.1% 76.7K
3.12
35.3% 61.4K
3.11
13.3% 23.2K
3.10
4.5% 7.8K
3.14
2.8% 4.9K

Top Countries

1. US US
129.7K
2. GB GB
18.9K
3. IE IE
5.2K
4. BE BE
3.7K
5. SG SG
3.3K
6. CN CN
2.9K
7. NL NL
2.9K
8. DE DE
2.4K
9. CA CA
1.5K
10. ID ID
1.3K

Package Information

License
MIT
First Release
September 19, 2016
Last Release
7 months ago
Last Commit
2 weeks ago
Latest Version
0.16.5
Total Releases
51
Contributors
68
Open PRs
29
Archived
No
Python Versions
3
Wheels
cp310 cp311 cp312 cp313 cp314 cp35 cp36 cp37 cp38 cp39
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links