This content originally appeared on DEV Community and was authored by Aleksei Aleinikov
Go’s new JSON stack landed in 2025 — but what really changed, and do you need to rewrite your code?
Here’s the short version:
•✅ Your old Marshal/Unmarshal still works (no big migration)
•⚡ New helpers: MarshalWrite, UnmarshalRead for direct I/O
•📡 Real streaming via jsontext.Encoder/Decoder
•🏷️ Smarter field tags (inline, format:DateOnly, unknown)
•🚀 Faster decoding + stricter defaults (catch bugs early)
Think of JSON v2 as a tightened toolkit: same foundations, but with better defaults, streaming, and performance.
👉 Full breakdown with practical examples here:
https://levelup.gitconnected.com/json-in-2025-what-actually-changed-in-v2-and-how-to-use-it-27d99efc5fcb
This content originally appeared on DEV Community and was authored by Aleksei Aleinikov
Aleksei Aleinikov | Sciencx (2025-08-21T03:39:32+00:00) 🌀 JSON v2 in Go (2025): What Actually Changed. Retrieved from https://www.scien.cx/2025/08/21/%f0%9f%8c%80-json-v2-in-go-2025-what-actually-changed/
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