ujson
Ultra fast JSON encoder and decoder for Python
ujson has been downloaded 1,258,188,479 times in total on PyPI, including 33,722,491 in the last 30 days. The latest version is 5.12.1, released May 5, 2026. It is distributed under the BSD-3-Clause AND TCL license.
Version5.12.1
Downloads
1.26G
LicenseBSD-3-Clause AND TCL
AuthorJonas Tarnstrom
Downloads
Weekly, last 90d.
Includes CI traffic.
VersionsTotal5.*4.*
Range
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Granularity
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CI traffic
Stack: OffCI: Included3 / 43 series
Selected total267.39M
1.3GAll-time
33.7MLast 30 days
1.3MLast 24 h
13.52/sPer second
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Version distribution
Share of downloads by released version. Computed over the last quarter.
- 0142.1%
5.12.1
57.0M downloadsDownloads57.0M42.1% - 0217.7%
5.13.0
24.0M downloadsDownloads24.0M17.7% - 0312.4%
5.12.0
16.8M downloadsDownloads16.8M12.4% - 049.7%
5.11.0
13.1M downloadsDownloads13.1M9.7% - 057.1%
5.10.0
9.6M downloadsDownloads9.6M7.1% - 062.0%
5.4.0
2.7M downloadsDownloads2.7M2.0% - 071.5%
1.34
2.1M downloadsDownloads2.1M1.5% - 081.5%
5.5.0
2.0M downloadsDownloads2.0M1.5% - 096.1%
Other
8.2M downloadsDownloads8.2M6.1%
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Thirteen recent days of ujson downloads. Drag the green handle on the right to guess where day fourteen lands.