NuGetNewtonsoft.
Newtonsoft.Json
Json.NET is a popular high-performance JSON framework for .NET
c-sharpjson
github.com/JamesNK/Newtonsoft.Jsonwww.newtonsoft.com/jsonMITJames Newton-King11.3k · 3.3k forks · 144 contributors
Release cadenceEvery 7 months
Last releaseSep 21, 2026
Open advisories0
Changelog quality61% curated
GitHub Releases, gaps for some releases
Release history Security
52 older or filtered releases not shown.
Upgrade guides
Breaking changes and a migration checklist for each major versionNewtonsoft.Json 12 → 1312.0.3 → 13.0.4Sep 16, 2025 BreakingBreaking2Security1New7Changed4Fixed22Newtonsoft.Json 11 → 1211.0.2 → 12.0.3Nov 9, 2019 UnknownDeprecated2New20Changed4Fixed30Newtonsoft.Json 10 → 1110.0.3 → 11.0.2Mar 24, 2018 BreakingBreaking1Deprecated1New13Changed12Fixed34Newtonsoft.Json 9 → 109.0.1 → 10.0.3Jun 18, 2017 BreakingBreaking6Platform1Deprecated5New24Changed9Fixed52Newtonsoft.Json 8 → 98.0.3 → 9.0.1Jun 22, 2016 UnknownNew2Changed2Fixed10Other1Newtonsoft.Json 7 → 87.0.1 → 8.0.3Mar 14, 2016 UnknownNew14Changed5Fixed34Newtonsoft.Json 6 → 76.0.8 → 7.0.1Jun 22, 2015 BreakingBreaking1Deprecated4New6Changed2Fixed19Newtonsoft.Json 5 → 65.0.8 → 6.0.8Jan 11, 2015 UnknownDeprecated2New35Changed13Fixed67Newtonsoft.Json 4 → 54.5.11 → 5.0.8Oct 17, 2013 BreakingBreaking3New24Changed11Fixed27Newtonsoft.Json 3 → 43.5.8 → 4.5.11Nov 20, 2012 BreakingBreaking6Security2New88Changed35Fixed114Other2
VersionChannelDateChangesSecurity
14.0.1-beta2 BetaSep 21, 2026No notes published14.0.1-beta1 BetaSep 21, 2026No notes published13.0.5-beta1 YankedOct 20, 2026No notes published13.0.4 StableSep 16, 2025New2Changed1Fixed413.0.4-beta1 YankedOct 20, 2026No notes published13.0.3 StableMar 8, 2023Fixed313.0.3-beta1 YankedOct 20, 2026No notes published13.0.2 StableNov 24, 2022New4Changed2Fixed713.0.2-beta3 YankedOct 20, 2026No notes published13.0.2-beta2 YankedOct 20, 2026No notes published13.0.2-beta1 YankedOct 20, 2026No notes published13.0.1 StableMar 22, 2021Breaking2Security1New1Changed1Fixed8Fix13.0.1-beta2 YankedOct 20, 2026No notes published13.0.1-beta1 YankedOct 20, 2026No notes published12.0.3 youStableNov 9, 2019New2Changed1Fixed1112.0.3-beta2 YankedOct 20, 2026No notes published12.0.3-beta1 YankedOct 20, 2026No notes published12.0.2 StableApr 22, 2019New4Changed1Fixed312.0.2-beta3 YankedOct 20, 2026No notes published12.0.2-beta2 YankedOct 20, 2026No notes published