No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
orjson has 201.6M monthly downloads and 8K GitHub stars. Version 3.11.9 supports Python 3.10+, first published in 2018.
It is stably maintained under a permissive license, last released in May 2026.
It is used by 2,943 tracked packages, including sglang, langsmith and lmnr.
GitHub topics include json, rust and serialization.
Package Insights
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
80
Popularity
79
Adoption
70
Community
30
Provenance
100
How the maintenance status was determined
Last commit
63 days ago
Monthly downloads
201,570,954
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
201,570,954
Stars
8,146
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
6,361,747
Month daily avg
6,719,032
Momentum
-5.3%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python 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
MPL-2.0 AND (Apache-2.0 OR 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
62 days ago
Total releases
149
Releases/year
19.5
•
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
24
Monthly downloads
201,570,954
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
28
Issue Burden
0.0
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
7.8%
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
3.3M
Windows
106.4K
macOS
62.0K
Python Versions
3.12
36.6%
1.2M
3.11
22.2%
739.9K
3.13
20.3%
676.1K
3.10
13.1%
437.5K
3.14
7.9%
262.5K
Top Countries
1.
US
2.6M
US
2.
DE
106.6K
DE
3.
SG
99.7K
SG
4.
IN
84.5K
IN
5.
GB
81.0K
GB
6.
IE
75.3K
IE
7.
NL
67.6K
NL
8.
JP
50.6K
JP
9.
KR
29.8K
KR
10.
FR
27.2K
FR
Dependencies
0
No dependencies
Used By
2943
- sglang
- langsmith
- lmnr
- langgraph-sdk
- trino
- gradio
- chromadb
- prefect
- kaleido
- langgraph-api
- pinecone
- dlt
- langgraph-checkpoint-postgres
- openhands-ai
- dspy
- pymilvus
- turbopuffer
- airbyte-cdk
- policy-sentry
- dagster-dbt
- arize-phoenix
- dvc-data
- tensordict
- sqltrie
- camoufox
- homeassistant
- leanclient
- lean-lsp-mcp
- markdown-to-confluence
- nicegui
- skypilot
- maggma
- chromadb-client
- kedro-viz
- pipelinewise-singer-python
- langgraph-checkpoint-redis
- aider-chat
- edgartools
- airbyte
- scrapling
- anki
- tinker
- anki-release
- localstack-ext
- langserve
- pymatgen-core
- chalkpy
- plotly-resampler
- drf-orjson-renderer
- sglang-router
GitHub Topics
Tags from the package's GitHub repository describing what it does.
Package Information
License
MPL-2.0 AND (Apache-2.0 OR MIT)
First Release
November 23, 2018
Last Release
2 months ago
Last Commit
2 months ago
Latest Version
3.11.9
Total Releases
149
Contributors
24
Open PRs
0
Archived
No
Python Versions
3
3.10
3.11
3.12
3.13
3.14
3.15
Wheels
cp310
cp311
cp312
cp313
cp314
cp35
cp36
cp37
cp38
cp39
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh