PyRank
ultrajson

ujson

Ultra fast JSON decoder and encoder written in C with Python bindings
PyPI GitHub
Downloads
Day
1.6M
Week
18.4M
Month
73.8M
Stars
4.5K
Forks
382
Issues
34
Version
5.12.1

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
100
Popularity
76
Adoption
80
Community
60
How the maintenance status was determined
Last commit
6 days ago
Monthly downloads
73,781,253
• 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
73,781,253
Stars
4,482
Stars per 1k downloads
0.06
• 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
2,625,506
Month daily avg
2,459,375
Momentum
+6.8%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
>=3.10
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
BSD-3-Clause AND TCL
• 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
16 days ago
Total releases
41
Releases/year
2.7
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
76
Monthly downloads
73,781,253
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
61
 
Issue Burden
7.6
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
19.9%
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 3.2M
Windows 16.6K
macOS 10.2K

Python Versions

3.11
63.1% 2.0M
3.12
26.6% 827.7K
3.13
5.6% 174.3K
3.10
3.7% 116.7K
3.14
1.0% 31.4K

Top Countries

1. US US
3.1M
2. IE IE
14.2K
3. DE DE
13.5K
4. NL NL
12.6K
5. GB GB
12.0K
6. IN IN
10.1K
7. JP JP
7.3K
8. SG SG
6.4K
9. KR KR
6.1K
10. CN CN
5.0K

GitHub Topics

Tags from the package's GitHub repository describing what it does.

Package Information

License
BSD-3-Clause AND TCL
First Release
June 16, 2011
Last Release
2 weeks ago
Last Commit
6 days ago
Latest Version
5.12.1
Total Releases
41
Contributors
76
Open PRs
13
Archived
No
Author
Jonas Tarnstrom
Python Versions
3 3.10 3.11 3.12 3.13 3.14
Wheels
cp27 cp310 cp311 cp312 cp313 cp314 cp35 cp36 cp37 cp38 cp39 pp310 pp311 pp37 pp38 pp39
Tracking Since
January 6, 2026
Data Updated
May 17, 2026
Data Freshness
Fresh

Links