PyRank
wolverdude

genson

GenSON is a powerful, user-friendly JSON Schema generator built in Python.
PyPI GitHub Verified repo
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

genson has 16.8M monthly downloads and 724 GitHub stars. Version 1.4.0, first published in 2014.

It is minimally maintained under a permissive license, last released in Jul 2026.

It is used by 93 tracked packages, including datamodel-code-generator, airbyte-cdk and outlines.

Downloads
Day
558.4K
Week
4.0M
Month
16.8M
Stars
724
Forks
74
Issues
19
Version
1.4.0

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
40
Popularity
58
Adoption
80
Community
40
Provenance
100
How the maintenance status was determined
Last commit
304 days ago
Monthly downloads
16,821,091
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
16,821,091
Stars
724
Stars per 1k downloads
0.04
• 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
573,364
Month daily avg
560,703
Momentum
+2.3%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
Not specified
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
Package does not declare a minimum Python version.
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
1 days ago
Total releases
13
Releases/year
1.1
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
13
Monthly downloads
16,821,091
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
44
 
Issue Burden
26.2
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
17.6%
contrib / forks
Stale Release
No
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

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

Downloads by OS

Linux 271.4K
Windows 3.3K
macOS 1.6K

Python Versions

3.12
30.3% 80.1K
3.11
21.5% 56.8K
3.13
17.6% 46.5K
3.10
15.5% 41.0K
3.14
15.2% 40.2K

Top Countries

1. US US
244.8K
2. DE DE
5.7K
3. NL NL
5.1K
4. BR BR
3.9K
5. IE IE
3.6K
6. GB GB
2.7K
7. CA CA
2.4K
8. SG SG
1.9K
9. BE BE
1.3K
10. JP JP
1.2K

Package Information

License
MIT
First Release
November 30, 2014
Last Release
2 days ago
Last Commit
10 months ago
Latest Version
1.4.0
Total Releases
13
Contributors
13
Open PRs
4
Archived
No
Author
Jon Wolverton
Python Versions
3 3.7 3.8 3.9 3.10 3.11 3.12
Wheels
py3
Keywords
json schema json-schema jsonschema object generate generator builder merge draft 7 validate validation
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links