--- title: A new experimental Go API for JSON | daily.dev description: Go 1.25 introduces experimental encoding/json/v2 and encoding/json/jsontext packages to address long-standing issues in the original encoding/json package. The... canonical: https://daily.dev/posts/wb64t17gi twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: A new experimental Go API for JSON | daily.dev og:description: Go 1.25 introduces experimental encoding/json/v2 and encoding/json/jsontext packages to address long-standing issues in the original encoding/json package. The... og:url: https://daily.dev/posts/wb64t17gi og:image: https://api.daily.dev/og/posts/WB64T17GI.png og:image:alt: Post cover image og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # A new experimental Go API for JSON **[Go Developers](https://daily.dev/sources/golangnuts)** · [@func25](https://daily.dev/func25) · 10 upvotes · 0 comments ## Summary Go 1.25 introduces experimental encoding/json/v2 and encoding/json/jsontext packages to address long-standing issues in the original encoding/json package. The new v2 API fixes behavioral flaws like invalid UTF-8 handling and duplicate JSON keys, improves performance especially for unmarshaling (up to 10x faster), and provides better streaming capabilities. The jsontext package handles JSON syntax while v2 manages semantics, offering new interfaces like MarshalerTo and UnmarshalerFrom for better performance. The original v1 package will be reimplemented using v2 under the hood, allowing gradual migration while maintaining backward compatibility. ## Full article daily.dev links to this article rather than hosting it. 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